US2983098A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas lubricated free piston engines with supercharging arrangements
Assignee: Individual
•
Filing: 1955-01-25
•
Granted: 1961-05-09
•
Expires: 1975-01-25
Abstract
No abstract record available.
Inventors
- 👤 Bush Vannevar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 03:57
CPC Classifications
F; F02; F02B; F02B71/00; F02B71/04; F02B71/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2083680A
Cited
US1343536A
Cited
US1291458A
Cited
US1615133A
Cited
US1614962A
Cited
US1820878A
Cited
US1930786A
Cited
GB467423A
Cited
US2200892A
Cited
GB502758A
Cited
US2344058A
Cited
FR896233A
Cited
US2470231A
Cited
US2469739A
Cited
US2414745A
Cited
US2479856A
Cited
US2600251A
Cited
US2671606A
Cited
US2703560A
Cited
US2703651A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-08 | 1964-11-07 | 1965-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-08 | 1968-11-07 | 1969-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-08 | 1972-11-07 | 1973-05-09 | $7700.00 | Window Closed / Lapsed |