# The Director ofthe United States Patent and Trademark Office Has receivedan applicationfor apatent for a new and useful invention. The title and description ofthe invention are enclosed. The requirements oflaw have been complied with, and it has been determined that apatent 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 others from making, using, offering./01' sale, or selling the invention throughout the United States of America or importing the invention into the United States of America, and 

# ifthe invention is aprocess, o.fthe right to exclude others./i-om using, offeringfor sale or selling throughout the UnitedStates 

# 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 

# thepayment ofrnaintenancefees asprovided by 35 Us.c. 41 (b). 

# See the Maintenance Fee Notice on the inside of the 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>.327.866 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 ofPatent: 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 I 0/012041.1 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. R 152:1 and lheir mixlures as ahemativcs for R 12. Journal ofEngineeringThennol'hysics. I**5.~.** 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