Patent US2146226A successfully refreshed from Google Patents.
US3379503A
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Process for preparing tungsten monocarbide
Assignee: Kennametal Inc
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Filing: 1965-11-12
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Granted: 1968-04-23
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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 08:10
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
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References Cited (Backward Citations)
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US2370610A
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US2532295A
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US2529778A
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GB729162A
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GB740547A
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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 |