US2492805A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Casehardening composition
Assignee: EIDP Inc
•
Filing: 1946-12-26
•
Granted: 1949-12-27
•
Expires: 1966-12-26
Abstract
No abstract record available.
Inventors
- 👤 Paul M Leininger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:08
CPC Classifications
C; C23; C23C; C23C8/00; C23C8/40; C23C8/42; C23C8/44; C23C8/46
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1736457A
Cited
US1804454A
Cited
US1980152A
Cited
US2095188A
Cited
US2210622A
Cited
US2339223A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-12-26 | 1953-06-27 | 1953-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-26 | 1957-06-27 | 1957-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-26 | 1961-06-27 | 1961-12-27 | $7700.00 | Window Closed / Lapsed |