Patent US2959205A successfully refreshed from Google Patents.
Patent US2900997A successfully refreshed from Google Patents.
US2900997A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure responsive valve
Assignee: Otis Engineering Corp
•
Filing: 1953-07-17
•
Granted: 1959-08-25
•
Expires: 1973-07-17
Abstract
No abstract record available.
Inventors
- 👤 James H Bostock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:39
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/12; F16K31/36; F16K31/363; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7723; Y10T137/7725; Y10T137/7758; Y10T137/7762; Y10T137/7764
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
GB191001424A
Cited
US2205033A
Cited
US2268733A
Cited
US2421810A
Cited
US2555483A
Cited
US2583295A
Cited
US2583384A
Cited
US2679261A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-08-24 | 1963-02-23 | 1963-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-24 | 1967-02-23 | 1967-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-24 | 1971-02-23 | 1971-08-25 | $7700.00 | Window Closed / Lapsed |