Patent US2910998A successfully refreshed from Google Patents.
US2910998A
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Anti-corrosive valve having a rubber spring
Assignee: Individual
•
Filing: 1957-01-15
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Granted: 1959-11-03
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Expires: 1977-01-15
Abstract
No abstract record available.
Inventors
- 👤 Herbert B Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:18
CPC Classifications
F; F16; F16K; F16K27/00; F16K27/02; F16K15/00; F16K15/02; F16K15/06; F16K15/063; F16K2200/00; F16K2200/30; F16K2200/303; Y; Y10; Y10T; Y10T137/00; Y10T137/6851; Y10T137/7036; Y10T137/7722; Y10T137/7837; Y10T137/7904; Y10T137/7905; Y10T137/7922; Y10T137/7923
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1923306A
Cited
US1930098A
Cited
US2181900A
Cited
US2202735A
Cited
US2299079A
Cited
US2639141A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-11-02 | 1963-05-04 | 1963-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-02 | 1967-05-04 | 1967-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-02 | 1971-05-04 | 1971-11-03 | $7700.00 | Window Closed / Lapsed |