US2524645A
Expired / Lapsed
US
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Assignee: Airkem Inc
•
Filing: 1946-11-13
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Granted: 1950-10-03
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Expires: 1966-11-13
Abstract
No abstract record available.
Inventors
- 👤 Furman S Abbott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:58
CPC Classifications
F; F04; F04B; F04B19/00; F04B19/02; F04B19/022; F04B17/00; F04B17/03; F04B17/04; F04B17/046; F04B23/00; F04B23/02; F04B23/021; F04B23/023
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) | 1953-10-02 | 1954-04-03 | 1954-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-10-02 | 1958-04-03 | 1958-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-10-02 | 1962-04-03 | 1962-10-03 | $7700.00 | Window Closed / Lapsed |