Patent US2946699A successfully refreshed from Google Patents.
Patent US2769435A successfully refreshed from Google Patents.
US2769435A
Expired / Lapsed
US
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Two stroke cycle internal combustion engine with pump compression
Assignee: Individual
•
Filing: 1951-02-28
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Granted: 1956-11-06
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Expires: 1971-02-28
Abstract
No abstract record available.
Inventors
- 👤 Charles E Cass
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:20
CPC Classifications
F; F02; F02B; F02B1/00; F02B75/00; F02B75/02; F02B2075/022; F02B2075/025; F02B2700/00; F02B2700/02; F02B2700/023; F02B75/16; F02B75/18; F02B75/22
Claims Analysis
Total Claims: 0
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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) | 1959-11-06 | 1960-05-07 | 1960-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-06 | 1964-05-07 | 1964-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-06 | 1968-05-07 | 1968-11-06 | $7700.00 | Window Closed / Lapsed |