US2912383A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compression refrigeration working fluid
Assignee: Sunoco Inc
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Filing: 1956-06-01
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Granted: 1959-11-10
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Expires: 1976-06-01
Abstract
No abstract record available.
Inventors
- 👤 William J Huth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:32
CPC Classifications
C; C10; C10M; C10M171/00; C10M2205/00; C10M2205/04; C10M2211/00; C10M2211/02; C10M2211/022; C10M2211/06; C10N; C10N2040/00; C10N2040/30; C10N2040/32; C10N2040/34; C10N2040/36; C10N2040/38; C10N2040/40; C10N2040/42; C10N2040/44; C10N2040/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
45 words
COMPRESSION REFRIGERATION WORKING FLUID CONSISTING ESSENTIALLY OF A HALOGENATED HYDROCARBON REFRIGERANT, A MINERAL OIL COMPRESSION REFRIGERATION LUBRICANT, AND FROM 5 TO 20 PERCENT BY VOLUME, BASED ON SAID LUBRICANT, OF A SOLUBLE POLYMERIC STYRENE, HAVING AVERAGE MOLECULAR WEIGHT IN THE RANGE OF 200 TO 100,000.
Claim 2
Dependent Claim
45 words
COMPRESSION REFRIGERATION WORKING FLUID CONSISTING ESSENTIALLY OF A HALOGENATED HYDROCARBON REFRIGERANT, A MINERAL OIL COMPRESSION REFRIGERATION LUBRICANT, AND FROM 5 TO 20 PERCENT BY VOLUME, BASED ON SAID LUBRICANT, OF A SOLUBLE POLYMERIC STYRENE, HAVING AVERAGE MOLECULAR WEIGHT IN THE RANGE OF 200 TO 100,000.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-11-09 | 1963-05-11 | 1963-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-09 | 1967-05-11 | 1967-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-09 | 1971-05-11 | 1971-11-10 | $7700.00 | Window Closed / Lapsed |