US2705877A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat transfer apparatus
Assignee: General Electric Co
•
Filing: 1951-09-22
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Granted: 1955-04-12
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Expires: 1971-09-22
Abstract
No abstract record available.
Inventors
- 👤 Ralph E King
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:02
CPC Classifications
F; F25; F25B; F25B39/00; F25B39/04; F28; F28D; F28D1/00; F28D1/02; F28D1/04; F28D1/047; F28D1/0477; F28F; F28F1/00; F28F1/10; F28F1/12; F28F1/122; F25D; F25D23/00; F25D23/006
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1516430A
Cited
US2040174A
Cited
GB452231A
Cited
US2378524A
Cited
US2469635A
Cited
US2620170A
Cited
US2667762A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-04-11 | 1958-10-11 | 1959-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-04-11 | 1962-10-11 | 1963-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-04-11 | 1966-10-11 | 1967-04-12 | $7700.00 | Window Closed / Lapsed |