US2529252A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure actuated control mechanism
Assignee: Individual
•
Filing: 1945-01-08
•
Granted: 1950-11-07
•
Expires: 1965-01-08
Abstract
No abstract record available.
Inventors
- 👤 Harper Esther Pardee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:48
CPC Classifications
G; G05; G05D; G05D16/00; G05D16/04; G05D16/12; C; C02; C02F; C02F1/00; C02F1/72; C02F1/76; C02F1/763; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2514; Y10T137/2559; Y10T137/2564; Y10T137/2572; Y10T137/7287; Y10T137/7358; Y10T137/7439; Y10T137/7485
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2137204A
Cited
US2158976A
Cited
US2158985A
Cited
US2391060A
Cited
US2300642A
Cited
US2459700A
Cited
US2469230A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-11-06 | 1954-05-08 | 1954-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-06 | 1958-05-08 | 1958-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-06 | 1962-05-08 | 1962-11-07 | $7700.00 | Window Closed / Lapsed |