US3379503A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing tungsten monocarbide
Assignee: Kennametal Inc
•
Filing: 1965-11-12
•
Granted: 1968-04-23
•
Expires: 1985-11-12
Abstract
No abstract record available.
Inventors
- 👤 Mckenna Philip Mowry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 01:16
CPC Classifications
C; C22; C22B; C22B34/00; C22B34/30; C22B34/36; C01; C01B; C01B32/00; C01B32/90; C01B32/914; C01B32/949
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2178773A
Cited
US2158520A
Cited
US2370610A
Cited
US2532295A
Cited
US2529778A
Cited
GB729162A
Cited
GB740547A
Cited
US2886454A
Cited
US3106456A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-04-23 | 1971-10-23 | 1972-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-23 | 1975-10-23 | 1976-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-23 | 1979-10-23 | 1980-04-23 | $7700.00 | Window Closed / Lapsed |