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US3513874A
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US
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Valve device having resilient response elements
Assignee: JAMES F DAVIS JR
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Filing: 1967-07-06
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Granted: 1970-05-26
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Expires: 1987-07-06
Abstract
No abstract record available.
Inventors
- 👤 James W Welsh
- 👤 James F Davis Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:21
CPC Classifications
F; F16; F16K; F16K1/00; F16K1/32; F16K1/34; F16K1/36; F16K1/40; Y; Y10; Y10S; Y10S251/00; Y10S251/902; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7879; Y10T137/8593; Y10T137/87096
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US935541A
Cited
US1165637A
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US2363279A
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US2369005A
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US3151628A
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US3399699A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-05-25 | 1973-11-24 | 1974-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-25 | 1977-11-24 | 1978-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-25 | 1981-11-24 | 1982-05-26 | $7700.00 | Window Closed / Lapsed |