US2501724A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for thermochemically cutting metal
Assignee: Airco Inc
•
Filing: 1946-02-15
•
Granted: 1950-03-28
•
Expires: 1966-02-15
Abstract
No abstract record available.
Inventors
- 👤 Howard G Hughey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:55
CPC Classifications
F; F23; F23D; F23D14/00; F23D14/38; F23D14/42
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1352381A
Cited
US1879346A
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US2221788A
Cited
DE694191C
Cited
US2277472A
Cited
US2398884A
Cited
US2418533A
Cited
US2417412A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-03-27 | 1953-09-26 | 1954-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-27 | 1957-09-26 | 1958-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-27 | 1961-09-26 | 1962-03-28 | $7700.00 | Window Closed / Lapsed |