US2299138A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat treating of steel
Assignee: Westinghouse Electric Corp
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Filing: 1941-10-04
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Granted: 1942-10-20
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Expires: 1961-10-04
Abstract
No abstract record available.
Inventors
- 👤 Jr John R Gier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:11
CPC Classifications
C; C23; C23C; C23C8/00; C23C8/06; C23C8/28; C23C8/30; C23C8/32; C21; C21D; C21D1/00; C21D1/74; C21D1/76; Y; Y10; Y10S; Y10S411/00; Y10S411/955; Y10S411/965; Y10S411/966
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1945-10-19 | 1946-04-20 | 1946-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-10-19 | 1950-04-20 | 1950-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-10-19 | 1954-04-20 | 1954-10-20 | $7700.00 | Window Closed / Lapsed |