Patent US4040555A successfully refreshed from Google Patents.
US1451201A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air-cooled internal-combustion engine and electric generator plant
Assignee: Individual
•
Filing: 1919-02-18
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Granted: 1923-04-10
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Expires: 1939-02-18
Abstract
No abstract record available.
Inventors
- 👤 Alexander T Brown
- 👤 Charles S Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:39
CPC Classifications
F; F01; F01P; F01P5/00; F01P5/02; F02; F02B; F02B63/00; F02B63/04; F02B63/044; F02B2063/045; F02B63/042
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) | 1926-04-09 | 1926-10-09 | 1927-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1930-04-09 | 1930-10-09 | 1931-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1934-04-09 | 1934-10-09 | 1935-04-10 | $7700.00 | Window Closed / Lapsed |