Patent US2012721A successfully refreshed from Google Patents.
US2012721A
Expired / Lapsed
US
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Internal combustion engine primer
Assignee: Individual
•
Filing: 1934-11-23
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Granted: 1935-08-27
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Expires: 1954-11-23
Abstract
No abstract record available.
Inventors
- 👤 James P Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:23
CPC Classifications
F; F02; F02N; F02N99/00; F02N99/002; F02N99/006; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/85978; Y10T137/86099
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1938-08-26 | 1939-02-25 | 1939-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-08-26 | 1943-02-25 | 1943-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-08-26 | 1947-02-25 | 1947-08-27 | $7700.00 | Window Closed / Lapsed |