Patent US3280381A successfully refreshed from Google Patents.
Patent US2884290A successfully refreshed from Google Patents.
US2884290A
Expired / Lapsed
US
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Expandable piston for internal combustion engines
Assignee: Individual
•
Filing: 1957-07-12
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Granted: 1959-04-28
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Expires: 1977-07-12
Abstract
No abstract record available.
Inventors
- 👤 Morrow Joseph Homer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:10
CPC Classifications
F; F16; F16J; F16J1/00; F16J1/04; F16J1/06; F02; F02F; F02F1/00; F02F1/18; F02F1/183
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-04-27 | 1962-10-27 | 1963-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-27 | 1966-10-27 | 1967-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-27 | 1970-10-27 | 1971-04-28 | $7700.00 | Window Closed / Lapsed |