US3409039A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve member having conically tapered seating surface
Assignee: GW Murphy Industries Inc
•
Filing: 1963-04-22
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Granted: 1968-11-05
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Expires: 1983-04-22
Abstract
No abstract record available.
Inventors
- 👤 Claude L Griffin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:44
CPC Classifications
F; F16; F16K; F16K1/00; F16K1/32; F16K1/34; F16K1/36; F16K1/38; F16K1/385; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7866; Y10T137/7867; Y10T137/7868
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB190827909A
Cited
US2011547A
Cited
US2148850A
Cited
US2768643A
Cited
US2900999A
Cited
US2930401A
Cited
US2977974A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-11-05 | 1972-05-06 | 1972-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-05 | 1976-05-06 | 1976-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-05 | 1980-05-06 | 1980-11-05 | $7700.00 | Window Closed / Lapsed |