US3035808A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure responsive valve
Assignee: Hydril LLC
•
Filing: 1956-08-30
•
Granted: 1962-05-22
•
Expires: 1976-08-30
Abstract
No abstract record available.
Inventors
- 👤 Granville S Knox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 18:27
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/12; F16K31/16; E; E21; E21B; E21B34/00; E21B34/06; E21B34/10; E21B34/16; E21B2200/00; E21B2200/03; E21B2200/04; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7723; Y10T137/7725; Y10T137/7758; Y10T137/7762; Y10T137/7769; Y10T137/777; Y10T137/7781; Y10T137/7782; Y10T137/7783; Y10T137/7837; Y10T137/7869; Y10T137/7871
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US543220A
Cited
US2125330A
Cited
US2238609A
Cited
US2908330A
Cited
US2708563A
Cited
US2963089A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-05-21 | 1965-11-20 | 1966-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-05-21 | 1969-11-20 | 1970-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-05-21 | 1973-11-20 | 1974-05-22 | $7700.00 | Window Closed / Lapsed |