US2653209A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic timer
Assignee: Westinghouse Electric Corp
•
Filing: 1950-08-19
•
Granted: 1953-09-22
•
Expires: 1970-08-19
Abstract
No abstract record available.
Inventors
- 👤 Edward C Hartwig
- 👤 Hubert W Van Ness
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:30
CPC Classifications
H; H05; H05B; H05B7/00; H05B7/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2146889A
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US2306791A
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US2354140A
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US2390981A
Cited
US2404643A
Cited
US2532111A
Cited
US2573360A
Cited
US2574939A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-09-21 | 1957-03-23 | 1957-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-09-21 | 1961-03-23 | 1961-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-09-21 | 1965-03-23 | 1965-09-22 | $7700.00 | Window Closed / Lapsed |