baber/WOPTO huggingface dataset:
Patent NO-913418-L (NO)
Inventor: WOJCIK HENDRICUS TADEUSZ
IPC: A47B88/493
Filed: 1991-09-02
Abstract: A telescopic rail mainly consisting of three, substantially C-shaped sections of which the inner or drawer section (3) is slidably mounted in the intermediate section (2) with interposition of a first ball cage and the intermediate section (2) is slidably mounted in the outer or cabinet section (1) with interposition of a second ball cage (7). Mounted at one end of the intermediate section (2) is a stop block (5) with resilient fingers (13) which can be brought into a coupling position wherein the inner section (3) is coupled to the intermediate section (2) and into a pass position wherein the inner section (3) can move independently of the intermediate section (2). The inner section (3) at one end thereof is provided with inwardly pointing projections (11) facing each other, which can cooperate with outwardly pointing projections (12) facing away from each other, provided on the resilient fingers (13) of the stop block (5), which projections (12) in the coupled position of the sections are disposed in the path of travel of the projections (11) of the inner section (3). Arranged between the free ends of the resilient fingers (13) is a locking member (6) which can be moved in the axial direction of the telescopic rail. <IMAGE>
Patent NO-914954-L (NO)
Inventor: COMMANDEUR RAYMOND
IPC: B41M5/337
Filed: 1991-12-16
Abstract: Heat-sensitive recording materials consisting of a substrate which has a layer containing a dye precursor and a developer which are heat-sensitive, the said layer also containing a polyphenylmethane of formula 
<IMAGE>
 in which: 
 
  R1 and R2, which are identical or different, are chosen from halogens, NO2, CN, OCH3, H or an alkyl containing up to 5 carbon atoms 
  n has the value of 3, 4 or 5 
  p has the value of 1, 2 or 3 
  q has the value of 0 or 1 and p + q has a value not exceeding 2 
  and such that the melting point is higher than 50 DEG C, 
 and these polyphenylmethanes per se (the case q=0, p=1, R1=ortho-CH3, R2=halogen or H is excluded).
Patent NO-921932-L (NO)
Title: Flytende sperring
Inventor: BERG LEIF
IPC: E02B15/04
Filed: 1992-05-15
Abstract: En flytende sperring omfatter et luftholdig oppdriftselement (13) og et teppe opphengt i oppdriftselementet (13), hvor teppet holdes i en omtrent vertikal stilling i vannet av et ballastelement (9) forbundet til teppet og oppdrifts- elementet og teppet består av et hylster dannet av en fleksibel film med nedre kant (7) forbundet med ballastelementet (9) og hvor hylsteret inneholder luft i en vesentlig mindre mengde enn mengden som er nødvendig for å blåse opp hylsteret, men tilstrekkelig til å holde hylsteret og ballasten flytende i vannet med en del av hylsteret ragende over vannflaten.
Patent NO-922452-L (NO)
Title: Fremgangsmaate for fjerning av forurensninger fra materialoverflater
Inventor: SLUGA ROBERT M
IPC: C23G5/00
Filed: 1992-06-19
Abstract: En fremgangsmåte for opprett- holdelse av et brennbart oppløsnings- middel i en ikke-brennbar omgivelse omfatter at det brennbare oppløsnings- middel dekkes med et ikke-brennbart dampteppe tilveiebrakt av et ikke- brennbart oppløsningsmiddel, slik at damp fra de brennbare og ikke-brennbare oppløsningsmidler danner en ikke-brenn- bar gassblanding i teppet. En slik fremgangsmåte anvendes ved fjerning av både oljebaserte og polare forurens- ninger for å kontrollere brennbarhets- potensialet av et alkoholisk oppløs- ningsmiddel. En apparatur (10) for ren- gjøring av gjenstander ved anvendelse av fluorkarbon og alkohol som oppløs- ningsmidler inkluderer et kammer (20) med flere rom (26, 28, 30) for innhold av oppløsningsmidlene og et begrenset dampområde (24 ). Minst ett av rommene inneholder flytende fluorkarbon og minst ett annet rom inneholder flytende alkohol. Oppløsningsmidlene fordamper over i det begrensede dampområde (24) for å tilveiebringe et ikke-brennbart dampteppe over det alkoholinneholdende rom (28 ). Fordampet alkohol blandes med det fordampede fluorkarbon for å danne en ikke-brennbar blanding som renses og atskilles, og det gjenvunne fluorkarbon kan anvendes på nytt i etterfølgende rengjøringsoperasjoner.
Patent NO-924672-L (NO)
Inventor: REICHERT PAUL
IPC: A61K38/00
Filed: 1992-12-03
Abstract: A method for making crystals of zinc interferon alpha-2, and the use thereof in depot formulations, are disclosed.
Patent NO-930087-L (NO)
Inventor: HOUSSIN EMMANUEL
IPC: E04D13/16
Filed: 1993-01-11
Abstract: Watertight roof covering device, comprising a bearing element (4) consisting of an assembly of contiguous metal sheets (5), an insulating layer (8) applied against the outer face of the bearing element, and an outer leakproofing covering (10) arranged against the insulating layer, as well as mechanical connection means (11) bearing on the outer covering and passing through the insulating layer and, if appropriate, the opposite sheet. 
<??>According to the invention, the contiguous sheets (5) of the said bearing element (4) comprise edges (18, 19) which are mutually superimposed in a marginal covering zone, these sheets comprising, at least in these edges, ribs (20, 21) whose heights are different, respectively, in the edge of a first sheet and in the adjacent edge of a second sheet covered by the first one, in such a way as to delimit between these ribs a closed seat (22) in which the end part (13, 24) of the connection means extends. 
<IMAGE>
Patent NO-931854-L (NO)
Inventor: HIPPER AUGUST
IPC: F26B15/18
Filed: 1993-05-21
Abstract: Wooden planks (2) are clamped on both sides in a drying apparatus with linear pressure transversely to the grain direction. <IMAGE>
Patent NO-931877-L (NO)
Title: Apparat for mating av råmateriale til aluminium-elektrolyse
Inventor: KUMPULAINEN VESA
IPC: C25C3/14
Filed: 1993-05-24
Abstract: Det er beskrevet et apparat for mating av pulverformet råmateriale som for eksempel aluminiumoksyd til en elektrolyse som produserer aluminium. Elektrolysen Innbefatter et anode- og katodeapparat (l, 2) og organ med hvilket pulverformet råmateriale overføres fra en silo (5) eller tilsvarende til et mateapparat (10, 11, 12, 13, 14, 15) med hvilket råmaterialet mates inn i elektrolyttsmelten (23). Mateapparatet innbefatter en boks (15) som kontrollerer matingen av råmateriale, til hvilken boks et materør (14) for råmateriale er forbundet. Mateorganet tllvelebragt med et mateorgan (13) anordnet til å operere inne l boksen 15, forbundet med en stempelstang (11) eller tilsvarende til en vibrator (10), med hvilken det tilveiebringes en hovedsakllg vertikal vibrasjon (V) av mateorganet. Den åpne nedre enden til boksen (15) er plassert i nærheten av overflaten (22) til elektrolyttsmelten (23) over denne, for å kunne operere inne i elektrolyttskorpen (25).
Patent NO-932286-L (NO)
Title: Stereoselektiv anion-glykosyleringsprosess
Inventor: CHOU TA-SEN
IPC: C07H19/16
Filed: 1993-06-21
Abstract: En Stereoselektiv anlon-glykosyleringsprosess for fremstilling av 6-anomeranriket 2'-deoksy-2',2'-dl- fluornukleosider ved reaksjon av a-anomeranriket 2- deoksy-fluor-1-halo-karbohydrat med minst en molar ekvivalent av et nukleobasesalt i et inert oppløsnings- middel.
Patent NO-933118-L (NO)
Title: Dyrkningsbeholder for cellekulturer
Inventor: FALKENBERG FRANK W
IPC: C12M1/12
Filed: 1993-09-01
Abstract: Dyrkningsbeholdere for cellekulturer med minst en cellekulturbeholder inneholdene cellekulturen som blir separert av en dialysemembran fra et nærlngsmedlum som skal bli tilsatt, idet næringsmidlene blir transportert gjennom dialysemembranen Inn i cellekulturbeholderen og de metaboliske produktene blir transportert ut av cellekulturbeholderen inn i næringsbeholderen og hvor et tilførsels- og fjerningssystem for gasser er nødvendig og blir dannet i løpet av celledyrkningen, er beskrevet. For å gjøre tilgjengelig en dyrknlngs- beholder for å danne cellekulturer med en høy celle- tetthet som er økonomisk å fremstille og lett å håndtere og hvor faren for infeksjoner er redusert er det foreslått at en gassutvekslingsraembran som er upermeabel for væsker og for mikroorganismer som kontaminerer cellekulturene som delvis reduserer cellekulturbeholderen blir tilveiebragt som et gasstilførsels- og fJerningssystem.
Patent NO-941022-L (NO)
Inventor: HOLTON ROBERT A
IPC: C07C233/87
Filed: 1994-03-22
Abstract: Prepn. of a substd. isoserine ester (I) comprises reacting a beta-lactam of (II) with a metal alkoxide MOCE1E2E3 (III). In the formulae, R1 = OR6, SR7, or NR8R9; R2 = H, 1-15C alkyl, 2-15C alkenyl, 2-15C alkynyl, 6-15C aryl, or heteroaryl (all opt. substd.); R3, R4 = as R2, or acyl, provided that R3 and R4 are not both acyl; R5 = COR10, COOR10, COSR10, CONR8R10, SO2R11, or POR12R13; R6 = as R2, OH protecting gp., or gp. to increase water solubility in a taxane deriv.; R7 = as R2 (but not H), or SH protecting gp.; R8 = as R2; R9 = amino protecting gp.; R10 = as R2 (but not H); R11-R13 = as R2 (but not H), OR10 or NR8R14; R14 = as R2; and E1-E3 = H, hydrocarbon, or cyclic; provided that at least one of E1-E3 is other than H. Prepn. of a taxane deriv. comprises the above process, in which one of E1-E3 = H and CE1E2E3 = a polycyclic skeleton, to form an intermediate; and converting this into the taxane deriv.
Patent NO-943765-L (NO)
Title: Aryloksybenzen-herbicidmidler
Inventor: CONDON MICHAEL EDWARD
IPC: C07D213/63
Filed: 1994-10-06
Abstract: Foreliggende oppfinnelse tilveiebringer aryloksybenzen- forbindelser med formel I ArO (D Videre tilveiebringes blandinger og fremgangsmåter som innbefatter disse forbindelser for bekjempelse av uønskede plantearter.
Patent NO-944575-L (NO)
Inventor: RIESS GUNTER
IPC: C07H11/04
Filed: 1994-11-29
Abstract: Moenomycin and its derivatives are suitable for preparation of medicaments for the treatment of stomach ulcers and for the control of Helicobacter pylori.
Patent NO-951929-L (NO)
Title: Avluftinnretning
Inventor: SCHOTTLER HANS-JURGEN
IPC: F24F/
Filed: 1995-05-16
Abstract: Avluftlnnretning (4;4a,4b) for utlufting av et Innerrom (2) mot et ytterrom (1), med en styreenhet (7;7c,7d; 1.0) som er tilordnet en fuktighetssensor (SA;1.41, 1,42) for registrering av Innerromfuktlgheten som måleverdl og som Innbefatter en bearbeldelsesenhet (71a-71d;1.2) for tilveiebringelse av et styreslgnal fra måleverdien, samt et med styreslgnalet pådratt styreledd (72c,72d,l.11;411) for endring av en transporterte luftmengde l avhengighet av styre- slgnalet, idet styreenheten (7;7c,7d;10.1;40) er utformet som en mikroprosessor-/lagerprogramerbar styring og denne minst er tilordnet en ytterligere slgnalopptager (5b;6;l.611,1.612,1.613) for selvstendig :registrering av en ytterligere måleverdl og/eller en j tidsmessig eller av brukeren av innerrommet på forhånd !. gitt styreverdl (apparatinnstllllng), idet styreenheten :(7;7c,7d;l .0) innbefatter en logisk bearbeldelsesenhet (1.81), hvor tilveiebringelsen av styresignalet på basis av de l det minste to måle-/styreverdier utføres slik at ved overskridelsen av en gitt verdi for innerromfuktlgheten avleveres det et styreslgnal for l det minste intervallmessig drift av avluftlnnretnlngen (4;4a,4b) for redusering av Innerromfuktlgheten til under den gitte verdi, mens styreslgnalet forøvrlg tilveiebringes ved hjelp av gitte sammenknytninger mellom er- henholdsvis styreverdlene.
Patent NO-961682-L (NO)
Inventor: PHAM PETE PHONG
IPC: A61M25/01
Filed: 1996-04-26
Abstract: This invention is an apparatus for endovascular occlusion through the formation of thrombi in arteries, veins, aneurysms, vascular malformations, and arteriovenous fistulas. In particular, it deals with an improved sacrificial link (141) between an endovascular device (104) which is introduced to and is intended to remain at the desired thrombus formation site and the device (137) used to introduce the device (104). The discrete sacrificial link (141) is a groove produced by laser scoring through a polymer coating. The invention further includes a method for introduction of the device and its electrolytic separation. <IMAGE>
Patent NO-961818-L (NO)
Inventor: KIRTLEY NEIL
IPC: C08F292/00
Filed: 1996-05-03
Abstract: PCT No. PCT/GB94/02404 Sec. 371 Date Oct. 4, 1996 Sec. 102(e) Date Oct. 4, 1996 PCT Filed Nov. 2, 1994 PCT Pub. No. WO95/12621 PCT Pub. Date May 11, 1995A highly filled, curable composition comprising (A) an addition polymerizable organic liquid which on curing forms a solid polymer, (B) 20 to 80% by volume of a finely divided particulate inorganic filler having a weight average particle size of less than 50 microns but not having a BET surface area of more than 30 m2xcm-3, and (C) 0.05 to 0.5% by weight of a polydimethylsiloxane and molded composite articles produced therefrom are disclosed. Such articles exhibit improved resilience to thermal shock.
Patent NO-961838-L (NO)
Inventor: MERO CHRISTOPHER J
IPC: B65D37/00
Filed: 1996-05-07
Abstract: The present invention relates to a blow molded plastic container whose thin wall shoulder (12) portion has a plurality of rib-like protrusions (15). Each of said rib-like protrusions are, in axial cross-section, configured with multiple radii of curvature (R1,R2,R3) having a specifically defined relationship. The protrusions so formed do not adversely affect the integrity of the shoulder portion wall structure and do not distort upon internal pressurization of the container. <IMAGE>
Patent NO-970112-L (NO)
Title: Testing av lagerinnhold
Inventor: KEYES EDWARD PATRICK
IPC: G11C29/08
Filed: 1997-01-10
Abstract: Fremgangsinåte for å teste et lager assosiert med en mikroprosessor, spesielt for bruk ved smartkort. Fremgangsmåten omfatter å sammenligne utdata fra lageret (2) og videreført langs en lesebane (10), med forhåndsbestemte datasignaler som er generert eksternt og videreført via en port (7) langs en lesebane (9). Sammenligningen utføres i en sammen- ligningsinnretning (3) som eksempelvis kan være en mikroprosessor med passende programmering. Utgangen fra sanimenligningsinnretningen (3) utgjør et enkelt riktig/uriktig verifikasjonssignal som påtrykkes en port (5). De lagrede data som rommes i lageret (2), kan være permanent lagrede data, som f.eks. i en ROM, eller (når lageret kan endres) kan leses inn spesielt til lageret for testens formål.
Patent NO-971952-L (NO)
Inventor: DOLPHIN DAVID
IPC: C07F13/00
Filed: 1997-04-25
Abstract: A  beta , beta '-dihydroxy meso-substituted chlorin, bacteriochlorin or isobacteriochlorin compound having the formula (I) or (II):    <IMAGE>  (I)  or   <IMAGE>  (II)  wherein M is a metal. A novel method for synthesizing the compound of formula (I) or (II) comprises the steps of: a. osmylating a  beta . beta '-unsubstituted, meso-substituted porphyrin to form an osmate ester at the  beta , beta '-position, and b. reducing the osmate ester to form the corresponding  beta , beta '-dihydroxy meso-substituted chlorin, bacteriochlorin or isobacteriochlorin of formula (I) or (II).
Patent NO-980004-L (NO)
Title: Beholder for medisinske fluider
Inventor: ANDERSSON GUNNAR
IPC: A61J1/14
Filed: 1998-01-02
Abstract: En sammenfallbar medisinsk behol- der som har et integrert ikke-sammen- fallbart kapillarrør formet av produksjons- verktøyene under formblåsing av beholderen, for å bestemme nivået av gjenværende fluid under tildelingen til pasienten.
Patent NO-983819-L (NO)
Inventor: BARTEL STEFAN
IPC: A01N43/90
Filed: 1998-08-20
Abstract: The present invention relates to novel optionally substituted 8-cyano-1-cyclo-propyl-7-(2,8-diazabicyclo[4.3.0]nonan-8-yl)-6-fluoro-1,4-dihydro-4-oxo-3-quinolinecarboxylic acids and their derivatives, of the general formula (I)in whichR1 represents hydrogen, C1-C4-alkyl which is optionally substituted by hydroxyl, methoxy, amino, methylamino or dimethylamino, or (5-methyl-2-oxo-1,3-dioxol-4-yl)methyl,R2 represents hydrogen, benzyl, C1-C3-alkyl, (5-methyl-2-oxo-1,3-dioxol-4-yl)methyl, radicals having the structures -CH=CH-COOR3, -CH2CH2COOR3, -CH2CH2CN, -CH2CH2COCH3 or -CH2COCH3, in which R3 represents methyl or ethyl, or a radical of the general structure R4-(NH-CHR5-CO)n-, in which R4 represents hydrogen, C1-C3-alkyl or the radical -COO-tert-butyl, R5 represents hydrogen, C1-C4-alkyl, hydroxyalkyl, aminoalkyl, thioalkyl, carboxyalkyl or benzyl and n is 1 or 2, andY is oxygen or sulfur,the process for their preparation and their use in antibacterial compositions.
Patent NO-991397-L (NO)
Inventor: COX RONALD J
IPC: A62B35/00
Filed: 1999-03-23
Abstract: A safety harness comprises a strap portion for extending over a portion of a person's body to retain the person within the safety harness. The strap portion is fabricated from a flexible material having an elastic extension in the range of approximately 3 to approximately 15% under a tensile load of approximately 10 pounds. The material of the strap portion also has a ultimate tensile load of at least approximately 5,000 lbs.
Patent NO-993094-L (NO)
Inventor: HABERLANDER ALBERT
IPC: F04B49/06
Filed: 1999-06-22
Abstract: PCT No. PCT/EP97/07038 Sec. 371 Date Jun. 23, 1999 Sec. 102(e) Date Jun. 23, 1999 PCT Filed Dec. 15, 1997 PCT Pub. No. WO98/28539 PCT Pub. Date Jul. 2, 1998The invention relates to a method for enhancing the dosing precision of a dosing pump which is driven by an asynchronous motor via an eccentric gear. The supply of the motor is cut off approximately half a cycle time before a desired dosing pause period or stoppage. The motor freewheels afterwards for part of the cycle time, before a direct voltage is applied to it for approximately a quarter cycle time, such that an eddy current is induced in the rotor, which produces an antipolarized magnetic field which brakes the rotor.
Patent NO-994386-L (NO)
Title: 2-substituerte benzoylcykloalkyl-1-karboksylsyrederivater
Inventor: VARASI MARIO
IPC: C07C69/743
Filed: 1999-09-10
Abstract: 2-(substituert benzoyl)-cykloalkyl-l-karboksylsyrer av formel (I) (I) hvor E er en Ci-C4 alkylenkjede i hvilken et karbonatom er eventuelt substituert; hver av R og R,, som er like eller forskjellige, er hydrogen, halogen, hydroksy, trifluormetyl, cyano, nitro, fenyl, benzyl, Ci-C6 alkyl, C,-C6 alkoksy, d-C6 alkyltio, SOR» eller S02R4; R2 er hydrogen eller -N(R7Rs) hvor hver av R7 og R« uavhengig er hydrogen, C]-C6 alkyl, benzyl, fenyl, hydroksy, CrC6 alkoksy, benzyloksy eller en av R7 og Rg er hydrogen og den andre er COR9; R3 er hydroksy, CrC6 alkoksy, fenoksy, benzyloksy eller en gruppe -N(Ri2Ri3); og farmasøytisk akseptable salter derav, har kynurenin-3- hydroksylasenzyminhibitoraktivitet.
Patent NO-994413-L (NO)
Inventor: MCDONALD DONALD M
IPC: A61K49/00
Filed: 1999-09-10
Abstract: Angiogenic endothelial cells are selectively targeted with lipid/DNA complexes or cationic liposomes containing a substance which affects the targeted cells by inhibiting or promoting their growth. A site of angiogenesis can be precisely located by administering cationic liposomes containing a detectable label. The complexes may comprise nucleotide constructs which are comprised of promoters which are selectively and exclusively activated in the environment of an angiogenic endothelial cell.
Patent SE-0000112-L (SE)
Inventor: ERIKSSON ESBJOERN
IPC: H01G4/015
Filed: 2000-01-14
Abstract: A capacitor element for a power capacitor having a plurality of films of dielectric material forming two adjacent dielectric layers, and also a plurality of electrodes of metal material, two of which are situated between the two adjacent dielectric layers spaced from and beside each other to produce and area which is free from metal material. According to the invention a permanent connection of a dielectric material is arranged in the area and unites the dielectric layers with each other. The invention also relates to a method for producing such a capacitor element, and a power capacitor having such a capacitor element.
Patent SE-0102756-L (SE)
Inventor: HOEGLUND ANDERS
IPC: F02M59/10
Filed: 2001-08-17
Abstract: The invention relates to a method of controlling the fuel injection to a combustion chamber (4), comprising the steps of: supplying fuel to a pump (2), which has a piston (7) reciprocating in a cylinder (6), pressurizing the fuel by applying a force onto the piston (7) by means of an actuator (8), so that the piston (7) is displaced from a first end position (9) towards a second end position (10), injection of fuel corresponding to a partial volume of the fuel pressurized in the cylinder (6), into the combustion chamber (4), and returning the piston (7) towards the first end position (9) by means of the pressurized fuel, so that the piston (7) acts with a driving force on the actuator (8). The invention also relates to a fuel injection device for carrying out the method.
Patent SE-0202839-L (SE)
Inventor: ROESBERG MIKAEL
IPC: A61L2/26
Filed: 2002-09-26
Abstract: This invention relates to a device for use in disinfection of a bag containing body fluid, the device comprising a bag-carrying element (1) and an element (8) for making a hole in the bag for the purpose of removing the body fluid from the same. The bag-carrying element (1) is adapted to carry a bag (2) lying on its extended side (5), wherein the bag-carrying element (1) allows the hole-making element (8) access to the underside of the bag at a hole-making place, the bag-carrying element (1) having an effective supporting surface (6) sloping to the hole-making place. The device further comprises a means (11) for injecting cleaning and/or disinfecting fluid, such as one or more of water, vapour or some other disinfectant, said means (11) being adapted to be inserted into the bag on the upper side thereof.
Patent SE-0202960-L (SE)
Inventor: JOHANSSON ROBERT
IPC: B65G/
Filed: 2002-10-04
Abstract: The lockable conveyor belt is for an overhead transporter and is supported and driven by rollers. The belt (1) is endless, has two longitudinal edges (2,3) and is arranged with a narrowing thickened part (4,5). The thickened parts have a first surface (8,9) and a corresponding second surface (10,11). These second surfaces have a main part with a linear cross-section.  At least one of the first surfaces has a convex, curved shaped cross-section, so that when the first surfaces are brought into contact with each other for creation of a material supporting part (6) of the belt, a gap (14) is formed between the first surfaces at a thinner part of the thickened parts.
Patent SE-0302470-L (SE)
Inventor: MEYER KNUT
IPC: F04B9/117
Filed: 2003-09-16
Abstract: The water conduit system (1) is connected to at least two water cylinders (3, 4), each of which uses its piston (11, 12) to deliver high-pressure water into the system. The pistons are connected to a drive unit (19, 20) for moving the pistons in and out of the cylinders in order to maintain the desired water pressure. The drive unit comprises a hydraulic device with a drive cylinder for each water cylinder.
Patent SE-0302765-L (SE)
Inventor: JOENSSON SVEN
IPC: B63B3/20
Filed: 2003-10-20
Abstract: A ship hull comprises an inner hull made of steel or aluminum built on a supporting structure of frames, stringers, longitudinals; and an outer hull made of a high strength steel. Between the inner and outer hull, a cellular plastic material is applied having chiefly closed cells for improved buoyancy and energy absorbing capability. At external strain, the outer hull and plastic material jointly constitute an energy absorbing deformation zone. - An INDEPENDENT CLAIM is also included for a method of manufacturing the inventive ship hull comprising attaching a layer of cellular plastic material having closed cells to the inner hull and a high strength steel layer acting as the outer hull.