Patent US2756728A successfully refreshed from Google Patents.
US2756728A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drive mechanism for rotary engines and the like
Assignee: Individual
•
Filing: 1954-01-21
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Granted: 1956-07-31
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Expires: 1974-01-21
Abstract
No abstract record available.
Inventors
- 👤 George E Mallinckrodt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 20:49
CPC Classifications
F; F16; F16D; F16D31/00; F02; F02B; F02B53/00; F02B53/04; F02B53/06; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
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) | 1959-07-31 | 1960-01-30 | 1960-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-07-31 | 1964-01-30 | 1964-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-07-31 | 1968-01-30 | 1968-07-31 | $7700.00 | Window Closed / Lapsed |