US2963878A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compressor surge prevention and drive motor cooling system
Assignee: RTX Corp
•
Filing: 1959-06-19
•
Granted: 1960-12-13
•
Expires: 1979-06-19
Abstract
No abstract record available.
Inventors
- 👤 John C Beggs
- 👤 Fred M Rosenbush
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:26
CPC Classifications
F; F25; F25B; F25B1/00; F25B1/04; F25B1/053; F25B31/00; F25B31/006; F25B31/008; F25B49/00; F25B49/02; F25B49/022; Y; Y10; Y10S; Y10S62/00; Y10S62/05
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2080288A
Cited
US2247950A
Cited
US2178425A
Cited
US2363273A
Cited
US2776542A
Cited
US2891391A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-12-13 | 1964-06-13 | 1964-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-13 | 1968-06-13 | 1968-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-13 | 1972-06-13 | 1972-12-13 | $7700.00 | Window Closed / Lapsed |