Patent US2989990A successfully refreshed from Google Patents.
US2989990A
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Assignee: General Dynamics Corp
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Filing: 1959-07-09
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Granted: 1961-06-27
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Expires: 1979-07-09
Abstract
No abstract record available.
Inventors
- 👤 Harold E Bass
- 👤 Ferry Gales
- 👤 Robert F White
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:00
CPC Classifications
F; F16; F16K; F16K5/00; F16K5/06; F16K5/0663; F16K5/0668; F16K5/08; F16K5/14; F16K5/20; F16K5/205; F16K5/208; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86831; Y10T137/86863; Y10T137/86871
Claims Analysis
Total Claims: 0
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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) | 1964-06-26 | 1964-12-26 | 1965-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-26 | 1968-12-26 | 1969-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-26 | 1972-12-26 | 1973-06-27 | $7700.00 | Window Closed / Lapsed |