US2902557A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure-responsive switches
Assignee: Individual
•
Filing: 1956-07-11
•
Granted: 1959-09-01
•
Expires: 1976-07-11
Abstract
No abstract record available.
Inventors
- 👤 Brockman Carl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:56
CPC Classifications
H; H01; H01H; H01H35/00; H01H35/24; H01H35/38; H01H35/34
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1960662A
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US1593222A
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US1774801A
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US2058553A
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US2435143A
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US2418508A
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US2472984A
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US2492261A
Cited
US2721913A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-08-31 | 1963-03-02 | 1963-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-31 | 1967-03-02 | 1967-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-31 | 1971-03-02 | 1971-09-01 | $7700.00 | Window Closed / Lapsed |