US2521969A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical booster starting system
Assignee: Individual
•
Filing: 1948-02-28
•
Granted: 1950-09-12
•
Expires: 1968-02-28
Abstract
No abstract record available.
Inventors
- 👤 Thomas L Dugan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 01:29
CPC Classifications
F; F02; F02N; F02N11/00; F02N11/08; F02N11/0862; F02N11/0866; H; H01; H01H; H01H51/00; H01H51/02; H01H51/04; H01H51/06; H01H51/065
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2152405A
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US2344568A
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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) | 1953-09-11 | 1954-03-13 | 1954-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-11 | 1958-03-13 | 1958-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-11 | 1962-03-13 | 1962-09-12 | $7700.00 | Window Closed / Lapsed |