US2820120A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric switch
Assignee: Motors Liquidation Co
•
Filing: 1954-11-18
•
Granted: 1958-01-14
•
Expires: 1974-11-18
Abstract
No abstract record available.
Inventors
- 👤 Flatt James Howard
- 👤 Harold J Cromwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 03:46
CPC Classifications
H; H01; H01H; H01H61/00; H01H61/06; H01H61/066
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2166498A
Cited
US2141775A
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US2225558A
Cited
US2299767A
Cited
US2600609A
Cited
US2672563A
Cited
GB711348A
Cited
US2687459A
Cited
US2700083A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-13 | 1961-07-15 | 1962-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-13 | 1965-07-15 | 1966-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-13 | 1969-07-15 | 1970-01-14 | $7700.00 | Window Closed / Lapsed |