US3493423A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coating carbon substrates with refractory metal carbides
Assignee: Union Carbide Corp
•
Filing: 1968-04-17
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Granted: 1970-02-03
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Expires: 1988-04-17
Abstract
No abstract record available.
Inventors
- 👤 Jurgen Hartwig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:55
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/80; C04B41/81; C04B41/85; C04B41/87; C04B41/45; C04B41/4505; C04B41/50; C04B41/5053; C04B41/5057
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2548897A
Cited
US2636856A
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US2910379A
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US2929741A
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US2996412A
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US3235346A
Cited
US3348967A
Cited
US3265528A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-02 | 1973-08-04 | 1974-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-02 | 1977-08-04 | 1978-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-02 | 1981-08-04 | 1982-02-03 | $7700.00 | Window Closed / Lapsed |