Patent US2052677A successfully refreshed from Google Patents.
US3490901A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing a titanium carbide-containing hard metallic composition of high toughness
Assignee: Nachi Fujikoshi Corp
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Filing: 1967-12-04
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Granted: 1970-01-20
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Expires: 1987-12-04
Abstract
No abstract record available.
Inventors
- 👤 Takeji Hachisuka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:43
CPC Classifications
C; C22; C22C; C22C29/00; C22C29/02; C22C29/06; C22C29/10
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-19 | 1973-07-21 | 1974-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-19 | 1977-07-21 | 1978-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-19 | 1981-07-21 | 1982-01-20 | $7700.00 | Window Closed / Lapsed |