US3024776A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means to feed supplementary air to internal combustion engines
Assignee: Individual
•
Filing: 1961-05-15
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Granted: 1962-03-13
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Expires: 1981-05-15
Abstract
No abstract record available.
Inventors
- 👤 William M Skirvin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:24
CPC Classifications
F; F02; F02M; F02M21/00; F02M2700/00; F02M2700/13; F02M2700/1305
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-03-12 | 1965-09-11 | 1966-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-03-12 | 1969-09-11 | 1970-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-03-12 | 1973-09-11 | 1974-03-13 | $7700.00 | Window Closed / Lapsed |