US2685889A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve of the check valve type
Assignee: Marmac Products Inc
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Filing: 1953-03-23
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Granted: 1954-08-10
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Expires: 1973-03-23
Abstract
No abstract record available.
Inventors
- 👤 Leighton Francis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 02:51
CPC Classifications
F; F16; F16K; F16K15/00; F16K15/02; F16K15/06; F16K15/025; F16K15/026; F16K1/00; F16K1/12; F16K1/126; F16K15/063; G; G05; G05D; G05D16/00; G05D16/04; G05D16/10; G05D16/103; G05D16/106; F16K2200/00; F16K2200/30; F16K2200/303; Y; Y10; Y10T; Y10T137/00; Y10T137/3367; Y10T137/7722; Y10T137/7837; Y10T137/7904; Y10T137/7922; Y10T137/7923
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) | 1957-08-09 | 1958-02-08 | 1958-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-09 | 1962-02-08 | 1962-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-09 | 1966-02-08 | 1966-08-10 | $7700.00 | Window Closed / Lapsed |