US3723318A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Propellants and refrigerants based on trifluoropropene
Assignee: Dow Silicones Corp
•
Filing: 1971-11-26
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Granted: 1973-03-27
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Expires: 1991-11-26
Abstract
Abstract Aerosol propellants and refrigerants based on trifluoropropene (CF3CH CH2) are disclosed.
Inventors
- 👤 A Butler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:43
CPC Classifications
C; C09; C09K; C09K3/00; C09K3/30; C09K5/00; C09K5/02; C09K5/04; C09K5/041; C09K5/044; C09K5/045; C09K2205/00; C09K2205/10; C09K2205/12; C09K2205/122; C09K2205/126
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
17 words
A refrigeration process as defined in claim 1 wherein the trifluoropropene constitutes 100 percent of the refrigerant.
Claim 2
Dependent Claim
19 words
A refrigeration process as defined in claim 1 wherein the trifluoropropene constitutes less than 100 percent of the refrigerant.
Claim 3
Dependent Claim
56 words
a composition consisting essentially of from 1 to 91 percent by weight of trifluoropropene, the balance of the composition being selected from the group consisting of fluorodichloromethane, difluorochloromethane, fluorotrichloromethane, difluorodichloromethane, 1,2,2-trifluoro-1,1,2-trichloroethane, 1,1,2,2-tetrafluoro-1,2-dichloroethane, 1,1,2,2,2-pentafluoro-1-chloroethane, 1,1-difluoro-1-chloroethane, 1,1-difluoroethane, octafluorocyclobutane, methylene chloride, 1,1,1-trichloroethane, tetrafluoroethylene, vinyl chloride, propane, n-butane, isobutane, ethylene, dimethyl ether, nitrogen, nitrous oxide, carbon dioxide and mixtures thereof.
References Cited (Backward Citations)
US3067263A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-03-26 | 1976-09-25 | 1977-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-26 | 1980-09-25 | 1981-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-26 | 1984-09-25 | 1985-03-27 | $7700.00 | Window Closed / Lapsed |