The Director of the United States 

Patent and Trademark Office 

Has received an application for apatentfor 

a new and useful invention. The title and 

description of the invention are enclosed. 

The requirements of law have been complied with, and it has been determined that 

a patent on the invention shall be granted 

under the law. 

Therefore. this 

United States Patent 

Grants to the person(s) having title to this 

patent the righllo exclude othersfrom making, using, offering ./01' sale, or selling the 

invention throughout the United States of 

America or importing the invention into the 

United States ofAmerica, and ifthe invention is aprocess, o.fthe right to exclude others ./i-om using, offering for sale or selling 

throughout the United States 0.[America, or 

importing into the United States of 

America, products made by that process, 

for the term setforth in 35 Us. C. 154(a)(2) 

or (c)(1), subject to the payment ofrnaintenancefees as provided by 35 Us.c. 41 (b). 

See the Maintenance Fee Notice on the 

inside ofthe covel: 

Dep/lTy DlreclOr (~fthe United Statcs Patent and Trademark O/Jice 
( 121 United States Patent 

Maruya 

(54)	 REFRIGERANT COMPOSITION 

Inventor:	 Richard H. Maruya. Kancohe. III (liS) 

Assignee:	 A.S. Trust & HlIldin~s Inc.. Saipan 

(AEl 

( * ) NOlice:	 Suojecl to any disclaimer. lhe lerm of this 

palcnt is extcnded or adjusled undcr .~5

U.s.c. 154(h) oy 31<1 days. 

(21 ) Appl. No.:	 I.VI06,701 

(22) Fik~d:	 May 12.2011 

Prior Publication Data 

US 201210286193 A I Nov. 15.2012 

(51 ) Int. CI. 

C09K .5/04 (2006.01) 

CIID 7/24 (2006.01) 

(52)	 (J.s. CI. 

lJSPC 25'])67: 510/407 

Field or Classification Search 

USPC 25'"2167: 510/407 

See application file for complele search history. 

References Cited 

U.S. PATENT DOCUMENTS 

1.4<J7.t>15 A />/ 1')24 Thompson
 

1.97(,.2[)4 A 1011 <J14 Vanderveer el al.
 

4.336.046 A />/ 1982 Sl:horre el a1. 

5.287.703 A • 2/19'14 Hcmhard el al. . . 621627 

5..160566 A • I 1/19')4 Stcvt~nson 252/67 

5.705.471 A • 1/19911 Minorel al. 510/4011 

1>.24X.256 Ii I • t>/200 I Nagao el al. 252/61\ 

t>.3 27.866 Ii I • 12I::!OO I Novak t'l ..I. t>:!I114 

1>.330.3.13 HI 112002 Lindgren 

6.846.7'J2 B2 * 112005 Minor el al. .'i IO/40K 

6.Xt>3.X40 1i2' ,V2005 Gohle .. 252/67 

6.,)02.6X6 H2' 6nOO5 Maruya . 252/t>7 

7.41.1.675 H2' 11/20011 Minor 252/(,K 

USOOX721916B2 

\ 10) Patent No.: US 8,721,916 82 

(45) Date of Patent: May 13,2014 

2<X))/0051756 AI * 312005 Maruya .. 252173 

2lXl7/0275Xo5 A I * I 1/2007 Tagawa el ;11. 501114:1K 

2001\l(l1711617 A I 7f20011 Jones cl al. 

2010/0147024 A I />/20 I0 Rohcns cl al. 

20 I0/012041.1 A I 1212010 Maruya 

FOREIGN PATENT I)(XUMENTS 

CN 101157849 A 41200X 

1"1' I ()l)4 100 AI 4120() I 

Gli 2 22R 719 A WIlJ")O 

JP I0205x44 A • 1lI1<J<)1l 

KI< 2002070 I 77 1\ • ')12002 

unlER PlJBI.ICATIONS 

Y. S. Chang cl ;11.. "I'erfornmncc and hcallranslCr characlerislics of
 

hydrocamon n:frigcrants in II heal pump syslcm". Inlernational Jour­


nal of Refrigeralion. 2.1 (2000). 232·242. *
 

Wu cl al. TI Study of u~inl! hydroeartxllls. R152:1 and lheir mixlures
 

as ahemativcs for R12. Journal of Engineering Thennol'hysics. I5.~.
 

Aug. 1'194. 2.~3-216.·
 

English Imnslation (,f KR20(t2-(X)70177. SCI'. 5. 21J02.*
 

* cited oy examiner 

I'rimllT\' !::.wmi1lt'r Douglas Mc Ginty 

(74) Allom('.\~ Agt'tll. or Finn - I<ichard C. Litman 

AHSTRA':T 

The refrignanll'Omposilion is il hydnM.:ilrhnn-hascd composition thilt Illay oe lIsed as a refrigerant for air condilioners. 

refrigerators or the like. and further. which may hl: used as a 

de(ngenl fnr cleaning precision componen(s. such a.s semiclll1dm:tor chips. mOlherhoards or Ihc like. The refrigcrant 

COlllposilion prefcrahly includes. hy volume. hl:twccn 50% 

and 6Y';, propylene. hl:tween ~(y.I;' and 45'1' propane. and 

hl:lwecn 5% and I()iff, isooulane. In a preferred emoodiment. 

lht' refrigerant composilion conlains aooul -lOth, propane, 

aooul ."5'~, propylene. anti ahout 5% isohulanc (melhyl propane) oy volumc. 

I Claim. Nil Ilruwin:.:s