US2768616A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two cycle opposed piston internal combustion engine
Assignee: THOMAS B DANCKWORTT
•
Filing: 1951-10-25
•
Granted: 1956-10-30
•
Expires: 1971-10-25
Abstract
No abstract record available.
Inventors
- 👤 Herbert J Venediger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:25
CPC Classifications
F; F01; F01B; F01B7/00; F01B7/02; F01B7/14; F02; F02B; F02B25/00; F02B75/00; F02B75/02; F02B2075/022; F02B2075/025; F02B2700/00; F02B2700/03; F02B2700/031; F02B75/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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GB360496A
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US2054232A
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US2170020A
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US2223898A
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US2359065A
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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) | 1959-10-30 | 1960-04-30 | 1960-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-30 | 1964-04-30 | 1964-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-30 | 1968-04-30 | 1968-10-30 | $7700.00 | Window Closed / Lapsed |