US2495055A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for flame hardening and annealing
Assignee: Airco Inc
•
Filing: 1944-11-07
•
Granted: 1950-01-17
•
Expires: 1964-11-07
Abstract
No abstract record available.
Inventors
- 👤 John J Crowe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:58
CPC Classifications
C; C21; C21D; C21D1/00; C21D1/06; C21D1/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1359128A
Cited
US2076515A
Cited
US2181095A
Cited
US2181937A
Cited
US2282942A
Cited
US2257605A
Cited
US2346923A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-01-16 | 1953-07-18 | 1954-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-16 | 1957-07-18 | 1958-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-16 | 1961-07-18 | 1962-01-17 | $7700.00 | Window Closed / Lapsed |