US3410974A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure switch mechanism
Assignee: KELEK CO
•
Filing: 1967-01-30
•
Granted: 1968-11-12
•
Expires: 1987-01-30
Abstract
No abstract record available.
Inventors
- 👤 Edwin E Kussmaul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:27
CPC Classifications
H; H01; H01H; H01H1/00; H01H1/50; H01H1/502; H01H21/00; H01H21/02; H01H21/14
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-11-12 | 1972-05-13 | 1972-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-12 | 1976-05-13 | 1976-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-12 | 1980-05-13 | 1980-11-12 | $7700.00 | Window Closed / Lapsed |