US2853097A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anti-corrosive valve structure
Assignee: Individual
•
Filing: 1955-08-11
•
Granted: 1958-09-23
•
Expires: 1975-08-11
Abstract
No abstract record available.
Inventors
- 👤 Herbert B Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:56
CPC Classifications
F; F16; F16K; F16K25/00; F16K25/04; F16K15/00; F16K15/02; F16K15/06; F16K15/063; F16K15/066; Y; Y10; Y10T; Y10T137/00; Y10T137/1624; Y10T137/1632; Y10T137/1789; Y10T137/7722; Y10T137/7837; Y10T137/7838; Y10T137/7854; Y10T137/7904; Y10T137/7905; Y10T137/7922; Y10T137/7923
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US661603A
Cited
US957347A
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US1515999A
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US2118300A
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US2295774A
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US2401237A
Cited
US2628062A
Cited
US2675204A
Cited
US2699801A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-22 | 1962-03-24 | 1962-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-22 | 1966-03-24 | 1966-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-22 | 1970-03-24 | 1970-09-23 | $7700.00 | Window Closed / Lapsed |