Washington sentinel., 1856-03-20
WOOD GAs.-CAUTION.

WOOD GAS.-CAUTION.
he IL known that 1, the subscriber OBJ
ID tanned letters patent in December, 1881, for
an apparatus Tor the destructive dstillation OF
wood aud the making therefrom OF tar or pitch al
pleasure, and gas; and that in the Judgment Of
competent persons the invention Of an appar-
tus recently patented by w. d. Porter cannot be
used by him or any other person wtnoui nfring-
iur nv said patent. And, further that what IS
patented by said Porter rightfuly belongs 10 me,
as | expect TO prove ere long before the United
States Patent Office and, further, that the use OF
said Porter's invention involves also process
which am now claiming before the United States
Patent Office, and which has been adjudged TO be
patentabe 10 the first inventor thereof and which
said w. ID. Porter has formally disclaimed, as ap-
pears upon the public records OF said office, OF
which an official copy is hereto annexed, and also
a copy of his claims.
In the National InteLtgsnc OF the 10th instant
Mr. Porter announces that he has secured by
patent the .exclusiye right 10 making gas from
- Ssss fsssiS No. sSs u sssisisni asi
comports with the fact of my patent Of December,
1851 and how far the threat can intimidate under
such circumstances? Mr. Porter's claim is based
upon movable perforated diaphragm, and was
so understood by the Patent Office, as il appears
from the records of the Patent Office that his
claim was al first refused as interfering with a
prior patent TO Robert FOULS, of Canada, for an
equivalent contriyance. This claim, as given be-
low, aud in which the perforated diaphragm is the
sa wing clause is what MT. Porter calls securing
the texclusive right 10 making gas from wood"
The statement carries absurdity on lis front, and
is a libel on the good sense of the Patent Once
If such claim right had been granted, II would
forbid every coal-kin and charcoal mandatory
IN the country.
The following copies Of correspondence and
extracts from the records Of the Patent Office will
show the true state of the case
UNIrEs STATES PATEST OFFICE,
August 25, 1854.
SIR In reply 10 your letter OF ihis date, asking
g if any patent has been granted TO w. ID. Porter,
dated 22d August, 1854 or AT any other time, or
10 any other person or persons securing to him
or them " tie ezeinsive right Of making gas from
,ooodn and whether any such claim was made py
w. ID. Porter, under his application Tor patent,
which letters patent We're issued bearing tae
above date you are informed that w. D. Porter's
claims are believed TO be mined TO his appara-
tus; and, further, this office is not aware that
patent has been granted heretofore for the ercln-
size right of making gas from a0osa II Wouid
however be uniustifable 10 expect me to make
an extended investigation TO answer your re-
quest.
am, respectfully, your obedient servant,
c. MASON Commissioner of Patents
w. p. MCDONALD, Esq,
Care of Prof. G.. G. Page, Washington, u. Y.
Tbs U,.itsd States Patent To all persons 10
achonp 1tese prese,its shall come, grating:
This is 10 certify that the annexed is true copy
from the files of this Office of an extract from
paper filed in the matter OF the apphcation oi ".
ID Porter for letters patent, in accordance win
which application letters patent were issued TO tha
said W. ID. Porter the 22d day OF August,
eighteen hundred and fity-four
In testimony whereof, /. Charles Mason, Com.
missioner Of Patents, have caused the sea-
of the Patent Office 10 he herennto aftxed
H. ST. this 25th day of August, in the year OF our
Lord one thousand eight hundred and hfty-
four. and of the Independence OF the United
States the seventy-ninib. Y. MASON
Conn Of diseLainseref w. ID. Porter sn h's appf'ea
ION for aan inproped sfW for making ioood
gas,"fled August 5, 1854. Letters patent ISSUED
Augusta 1854.
al do not claim as my invention and discovery
the improvements in making gas from WOOD, VIZ;
subiectng the products oil destrucuve aislaov .avi
tberetrom TO high degree OF heat, substantially
as has been described and for the purposes sci
forth in the specification of w. p. Mcdonnell
tn. Ir,,,,,d States Patent ORoe-To all persons 10
,ohops these presents shall come grsa'ng
This il 10 certify that the annexed Is true copy
from the records ofths Office of an extract from
The specification of w. d. Porers patent, issued
in the twenty second day OF August, eighteen
hundred and fhy-tour.
In testimony whereof, /, Charles Mason, Som-
missioner Of Patents, have caused the
zeal Of The Patent Office TO be hereunto
affixed this twenty 6fth day OF August,
IL 5. ,he wear Of our Lord one thousand
eight hundred and fhy-four, and OF the
Independence of the United States the
seventy ninth. y. MASON.
Eaaract from Specification Of " " asTfsr ~ e. on
,cbieh Lttsrs patent pers issHsd August 22, 1904.
CLAIM.-What | claim my invention and de-
sire TO secure by letters patent Is:
"The construction Of q gas apparatus or sum-
consisting Of a metallic or other cylinder b the
cones and d, diaphrsm plate 9, and exit pipe
r. substantially as described in the foregoing spe
cifcation, and shown in the accompanying draw
ings.n
he records OF the Patent Office, TO which all have
WIN. p. MCCONNELL,
Nv his attorney CHAS. q. PAGE.