US2500943A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combination range
Assignee: Individual
•
Filing: 1945-12-22
•
Granted: 1950-03-21
•
Expires: 1965-12-22
Abstract
No abstract record available.
Inventors
- 👤 Lewis J Haines
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:48
CPC Classifications
F; F24; F24C; F24C5/00; F24C5/02; F24C15/00; F24C15/32
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2007297A
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US2072276A
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US2089816A
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US2136666A
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US2201913A
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US2219623A
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US2353689A
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US2330496A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-03-20 | 1953-09-19 | 1954-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-20 | 1957-09-19 | 1958-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-20 | 1961-09-19 | 1962-03-21 | $7700.00 | Window Closed / Lapsed |