US2837895A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hot air engine
Assignee: CLARA M LONG
•
Filing: 1953-09-28
•
Granted: 1958-06-10
•
Expires: 1973-09-28
Abstract
No abstract record available.
Inventors
- 👤 Leon C Webb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:33
CPC Classifications
F; F02; F02G; F02G1/00; F02G1/04; F02G1/043; F02G3/00; F02G2244/00; F02G2270/00; F02G2270/85
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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CH213793A
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US2628015A
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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) | 1961-06-09 | 1961-12-09 | 1962-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-09 | 1965-12-09 | 1966-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-09 | 1969-12-09 | 1970-06-10 | $7700.00 | Window Closed / Lapsed |