US3519497A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the thermal treatment of steel rails
Assignee: Lorraine Escaut SA
•
Filing: 1966-04-28
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Granted: 1970-07-07
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Expires: 1986-04-28
Abstract
No abstract record available.
Inventors
- 👤 Jacques Pomey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:13
CPC Classifications
C; C21; C21D; C21D1/00; C21D1/34; C21D1/53; C21D9/00; C21D9/04; C22; C22C; C22C38/00; C22C38/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US368132A
Cited
US879634A
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US1827616A
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US2116070A
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US2576223A
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US3053704A
Cited
US3197346A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-07-06 | 1974-01-05 | 1974-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-06 | 1978-01-05 | 1978-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-06 | 1982-01-05 | 1982-07-07 | $7700.00 | Window Closed / Lapsed |