US5032305A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubricant for refrigerant
Assignee: Adeka Corp
•
Filing: 1990-04-13
•
Granted: 1991-07-16
•
Expires: 2010-04-13
Abstract
Abstract A lubricant composition for refrigerators characterised by comprising at least 80 percent by weight of a compound having a kinematic viscosity of 6 to 500 cSt at 40 degrees centigrade and represented by the formula (1): <CHEM> wherein the radicals CmH2m+1 and CnH2n+1 may be straight or branched and wherein m represents an integer of 1 to 8, n represents an integer of 1 to 8, p represents an integer of 1 to 80, q represents an integer of 0 to 60, and r represents 0 or 1, with the proviso that the relationships: 2 </= m + n </= 9 and <MATH> are both satisfied. The invention also relates to refrigerant compositions comprising the above lubricant composition and Flon 134a.
Inventors
- 👤 Tamiji Kamakura
- 👤 Yuzi Baba
- 👤 Kimiyoshi Namiwa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:25
CPC Classifications
C; C10; C10M; C10M111/00; C10M111/04; C10M105/00; C10M105/50; C10M105/52; C10M107/00; C10M107/20; C10M107/30; C10M107/32; C10M107/34; C10M129/00; C10M129/02; C10M129/16; C10M129/18; C10M129/66; C10M133/00; C10M133/02; C10M133/04; C10M133/12; C10M135/00; C10M135/32; C10M135/36; C10M137/00; C10M137/02; C10M137/04; C10M159/00; C10M159/12; C10M159/18; C10M169/00; C10M169/04; C10M169/045; C10M171/00; C10M171/008; C10M2207/00; C10M2207/04; C10M2207/042; C10M2207/09; C10M2207/10; C10M2207/24; C10M2207/40; C10M2207/404; C10M2209/00; C10M2209/10; C10M2209/103; C10M2209/1033; C10M2209/104; C10M2209/1045; C10M2209/105; C10M2209/1055; C10M2209/106; C10M2209/1065; C10M2209/107; C10M2209/1075; C10M2209/108; C10M2209/1085; C10M2209/109; C10M2209/1095; C10M2211/00; C10M2211/02; C10M2211/0206; C10M2211/022; C10M2211/0225; C10M2211/024; C10M2211/0245; C10M2211/06; C10M2215/00; C10M2215/02; C10M2215/06; C10M2215/064; C10M2215/065; C10M2215/066; C10M2215/067; C10M2215/068; C10M2219/00; C10M2219/10; C10M2219/104; C10M2219/106; C10M2219/108; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/041; C10M2223/042; C10M2223/049; C10M2223/10; C10M2227/00; C10M2227/08; C10M2227/083; C10M2227/09; C10N; C10N2020/00; C10N2020/01; C10N2040/00; C10N2040/30; C10N2040/32; C10N2040/34; C10N2040/36; C10N2040/38; C10N2040/40; C10N2040/42; C10N2040/44; C10N2040/50
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
69 words
A refrigerant composition comprising a compound of formula (1) having a kinematic viscosity of 6 to 500 cSt at 40° C.: ##STR4## wherein m is an integer of 1-8, n is an integer of 1-8, p is an integer of 1-80, q is an integer of 0-60 and r is 0 or 1, with the provisos that ##EQU3## and 1,1,1,2-tetrafluoroethane in a weight ratio of from 1:99 to 99:1.
Claim 2
Dependent Claim
69 words
A refrigerant composition comprising a compound of formula (1) having a kinematic viscosity of 6 to 500 cSt at 40° C.: ##STR4## wherein m is an integer of 1-8, n is an integer of 1-8, p is an integer of 1-80, q is an integer of 0-60 and r is 0 or 1, with the provisos that ##EQU3## and 1,1,1,2-tetrafluoroethane in a weight ratio of from 1:99 to 99:1.
Claim 3
Dependent Claim
12 words
A refrigerant composition according to claim 1, wherein said compound is ##STR5##
Claim 4
Dependent Claim
12 words
A refrigerant composition according to claim 1, wherein said compound is ##STR6##
Claim 5
Dependent Claim
12 words
A refrigerant composition according to claim 1, wherein said compound is ##STR7##
Claim 6
Dependent Claim
12 words
A refrigerant composition according to claim 1, wherein said compound is ##STR8##
Claim 7
Dependent Claim
12 words
A refrigerant composition according to claim 1, wherein said compound is ##STR9##
Claim 8
Dependent Claim
12 words
A refrigerant composition according to claim 1, wherein said compound is ##STR10##
Claim 9
Dependent Claim
12 words
A refrigerant composition according to claim 1, wherein said compound is ##STR11##
Claim 10
Dependent Claim
12 words
A refrigerant composition according to claim 1, wherein said compound is ##STR12##
Claim 11
Independent Claim
77 words
A method of making a refrigerant composition comprising the step of combining 1,1,1,2-tetrafluoroethane and a compound of formula (1) having a kinematic viscosity of 6 to 500 cSt at 40° C.: ##STR13## wherein m is an integer of 1-8, n is an integer of 1-8, p is an integer of 1-80, q is an integer of 0-60 and r is 0 or 1, with the provisos that ##EQU4## in a weight ratio of from 1:99 to 99:1.
Claim 12
Independent Claim
77 words
A method of making a refrigerant composition comprising the step of combining 1,1,1,2-tetrafluoroethane and a compound of formula (1) having a kinematic viscosity of 6 to 500 cSt at 40° C.: ##STR13## wherein m is an integer of 1-8, n is an integer of 1-8, p is an integer of 1-80, q is an integer of 0-60 and r is 0 or 1, with the provisos that ##EQU4## in a weight ratio of from 1:99 to 99:1.
References Cited (Backward Citations)
US2717242A
Cited
US2796423A
Cited
US2801968A
Cited
US2839468A
Cited
US4301083A
Cited
DE2943446A1
Cited
EP0017072A2
Cited
US4755316A
Cited
US4898992A
Cited
US4851144A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-07-15 | 1995-01-14 | 1995-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-07-15 | 1999-01-14 | 1999-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-07-15 | 2003-01-14 | 2003-07-16 | $7700.00 | Window Closed / Lapsed |