Patent US2501867A successfully refreshed from Google Patents.
US2501867A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid pressure operated switch
Assignee: Individual
•
Filing: 1947-09-17
•
Granted: 1950-03-28
•
Expires: 1967-09-17
Abstract
No abstract record available.
Inventors
- 👤 Richard T Gleisen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:47
CPC Classifications
H; H01; H01H; H01H35/00; H01H35/24; B; B60; B60R; B60R25/00; B60R25/10; B60R25/1004
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1414912A
Cited
US1223060A
Cited
US1245239A
Cited
US1589523A
Cited
US1620493A
Cited
US2406719A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-03-27 | 1953-09-26 | 1954-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-27 | 1957-09-26 | 1958-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-27 | 1961-09-26 | 1962-03-28 | $7700.00 | Window Closed / Lapsed |