US3007669A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve
Assignee: Otis Engineering Corp
•
Filing: 1956-09-13
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Granted: 1961-11-07
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Expires: 1976-09-13
Abstract
No abstract record available.
Inventors
- 👤 John V Fredd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:13
CPC Classifications
E; E21; E21B; E21B34/00; E21B34/06; E21B34/12; E21B34/10; F; F16; F16K; F16K5/00; F16K5/06; E21B2200/00; E21B2200/04; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7781; Y10T137/7793; Y10T137/7831
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1759060A
Cited
US2645448A
Cited
US2908330A
Cited
US2708563A
Cited
US2785755A
Cited
US2963089A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-11-06 | 1965-05-08 | 1965-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-11-06 | 1969-05-08 | 1969-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-11-06 | 1973-05-08 | 1973-11-07 | $7700.00 | Window Closed / Lapsed |