US2985157A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Supercharged, port controlled opposed piston, two-cycle internal combustion engine
Assignee: THOMAS B DANCKWORTT
•
Filing: 1959-08-03
•
Granted: 1961-05-23
•
Expires: 1979-08-03
Abstract
No abstract record available.
Inventors
- 👤 Herbert J Venediger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:10
CPC Classifications
F; F02; F02B; F02B25/00; F02B25/02; F02B25/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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CH81671A
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US2431859A
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US2406404A
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US2768616A
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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) | 1964-05-22 | 1964-11-21 | 1965-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-22 | 1968-11-21 | 1969-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-22 | 1972-11-21 | 1973-05-23 | $7700.00 | Window Closed / Lapsed |