US3458445A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Absorption refrigeration system containing solutions of monoethylamine with thiocyanates
Assignee: American Gas Association Inc
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Filing: 1967-05-05
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Granted: 1969-07-29
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Expires: 1987-05-05
Abstract
No abstract record available.
Inventors
- 👤 Robert A Macriss
- 👤 Sanford A Weil
- 👤 William F Rush
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:44
CPC Classifications
C; C09; C09K; C09K5/00; C09K5/02; C09K5/04; C09K5/047; F; F25; F25B; F25B15/00; F25B15/02; Y; Y02; Y02A; Y02A30/00; Y02A30/27; Y02B; Y02B30/00; Y02B30/62; Y02P; Y02P20/00; Y02P20/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1734278A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-07-28 | 1973-01-27 | 1973-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-28 | 1977-01-27 | 1977-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-28 | 1981-01-27 | 1981-07-29 | $7700.00 | Window Closed / Lapsed |