US2485175A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of recovering hard metal carbides from sintered masses
Assignee: Individual
•
Filing: 1946-06-03
•
Granted: 1949-10-18
•
Expires: 1966-06-03
Abstract
No abstract record available.
Inventors
- 👤 Trapp George Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:55
CPC Classifications
C; C01; C01B; C01B32/00; C01B32/90; C01B32/914; C01B32/949; C01P; C01P2006/00; C01P2006/80
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2285909A
Cited
US2407752A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-10-17 | 1953-04-18 | 1953-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-10-17 | 1957-04-18 | 1957-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-10-17 | 1961-04-18 | 1961-10-18 | $7700.00 | Window Closed / Lapsed |