US3249546A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Azeotrope refrigerant compositions
Assignee: EIDP Inc
•
Filing: 1964-06-25
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Granted: 1966-05-03
•
Expires: 1984-06-25
Abstract
No abstract record available.
Inventors
- 👤 Jr Bernhardt J Eiseman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:00
CPC Classifications
C; C09; C09K; C09K5/00; C09K5/02; C09K5/04; C09K5/041; C09K5/044; C23; C23G; C23G5/00; C23G5/02; C23G5/028; C23G5/02809; C23G5/02812; C09K2205/00; C09K2205/10; C09K2205/12; C09K2205/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
33 words
AN AZEOTROPIC COMPOSITION HAVING A BOILING POINT OF ABOUT 74.5*F. AT 760 MM. HG PRESSURE AND CONSISTING OF (A) ABOUT 92% BY WEIGHT OF TRICHLOROMONOFLUOROMETHANE AND (B) ABOUT 8% BY WEIGHT OF ISOPENTANE.
Claim 2
Dependent Claim
33 words
AN AZEOTROPIC COMPOSITION HAVING A BOILING POINT OF ABOUT 74.5*F. AT 760 MM. HG PRESSURE AND CONSISTING OF (A) ABOUT 92% BY WEIGHT OF TRICHLOROMONOFLUOROMETHANE AND (B) ABOUT 8% BY WEIGHT OF ISOPENTANE.
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) | 1969-05-02 | 1969-11-01 | 1970-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-02 | 1973-11-01 | 1974-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-02 | 1977-11-01 | 1978-05-03 | $7700.00 | Window Closed / Lapsed |