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US2565360A
Expired / Lapsed
US
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Method for nitriding
Assignee: Individual
•
Filing: 1947-12-15
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Granted: 1951-08-21
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Expires: 1967-12-15
Abstract
No abstract record available.
Inventors
- 👤 Leon G Dufilho
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:01
CPC Classifications
C; C23; C23C; C23C8/00; C23C8/06; C23C8/08; C23C8/24; C23C8/26; C23C8/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1726431A
Cited
US1930388A
Cited
US1907183A
Cited
US1916015A
Cited
US2012039A
Cited
US2172428A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-08-20 | 1955-02-19 | 1955-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-08-20 | 1959-02-19 | 1959-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-08-20 | 1963-02-19 | 1963-08-21 | $7700.00 | Window Closed / Lapsed |