US2821592A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure actuated switch
Assignee: Individual
•
Filing: 1956-02-20
•
Granted: 1958-01-28
•
Expires: 1976-02-20
Abstract
No abstract record available.
Inventors
- 👤 Paul B Sagar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:29
CPC Classifications
H; H01; H01H; H01H29/00; H01H29/20; H01H35/00; H01H35/24; H01H35/40
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1292334A
Cited
US1398892A
Cited
US1693309A
Cited
US1653177A
Cited
US2214092A
Cited
US2470553A
Cited
US2679731A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-27 | 1961-07-29 | 1962-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-27 | 1965-07-29 | 1966-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-27 | 1969-07-29 | 1970-01-28 | $7700.00 | Window Closed / Lapsed |