Patent US3440147A successfully refreshed from Google Patents.
US3440147A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combined heat load cooler and sea water desalination still
Assignee: RTX Corp
•
Filing: 1966-07-14
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Granted: 1969-04-22
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Expires: 1986-07-14
Abstract
No abstract record available.
Inventors
- 👤 George C Rannenberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:14
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/02; C02F1/04; C02F1/16; Y; Y02; Y02A; Y02A20/00; Y02A20/124; Y10; Y10S; Y10S203/00; Y10S203/11; Y10S203/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2389064A
Cited
US2637684A
Cited
US2619453A
Cited
US2777514A
Cited
US2759882A
Cited
US3248305A
Cited
US3347753A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-21 | 1972-10-21 | 1973-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-21 | 1976-10-21 | 1977-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-21 | 1980-10-21 | 1981-04-22 | $7700.00 | Window Closed / Lapsed |