US2722580A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure switch
Assignee: Cook Electric Co
•
Filing: 1949-12-02
•
Granted: 1955-11-01
•
Expires: 1969-12-02
Abstract
No abstract record available.
Inventors
- 👤 Walter C Hasselhorn
- 👤 John S Baker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:19
CPC Classifications
H; H01; H01H; H01H35/00; H01H35/24; H01H35/26; H01H35/2607; H01H35/2628
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1231561A
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US1932988A
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US2551489A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-10-31 | 1959-05-02 | 1959-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-31 | 1963-05-02 | 1963-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-31 | 1967-05-02 | 1967-11-01 | $7700.00 | Window Closed / Lapsed |