Patent US4996699A successfully refreshed from Google Patents.
Patent US2475770A successfully refreshed from Google Patents.
US2475770A
Expired / Lapsed
US
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Revolver-type reciprocating piston engine
Assignee: Hartford National Bank and Trust Co
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Filing: 1946-04-15
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Granted: 1949-07-12
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Expires: 1966-04-15
Abstract
No abstract record available.
Inventors
- 👤 Wijsman Johannes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:23
CPC Classifications
F; F02; F02G; F02G1/00; F02G1/04; F02G1/043; F02G1/044
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1669976A
Cited
US2095255A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-07-11 | 1953-01-10 | 1953-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-07-11 | 1957-01-10 | 1957-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-07-11 | 1961-01-10 | 1961-07-12 | $7700.00 | Window Closed / Lapsed |