US2844679A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure responsive switch
Assignee: Individual
•
Filing: 1954-03-01
•
Granted: 1958-07-22
•
Expires: 1974-03-01
Abstract
No abstract record available.
Inventors
- 👤 Selby W Brewer
- 👤 Ivan J Umbarger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:35
CPC Classifications
H; H01; H01H; H01H35/00; H01H35/24; H01H35/26; H01H35/2607; H01H35/2614
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1421940A
Cited
US1900229A
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US1936821A
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US1950049A
Cited
US2239348A
Cited
US2431674A
Cited
US2395007A
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US2640977A
Cited
US2759061A
Cited
US2736778A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-07-21 | 1962-01-20 | 1962-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-21 | 1966-01-20 | 1966-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-21 | 1970-01-20 | 1970-07-22 | $7700.00 | Window Closed / Lapsed |