Patent US3389977A successfully refreshed from Google Patents.
US3389977A
Expired / Lapsed
US
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Tungsten carbide coated article of manufacture
Assignee: Texas Instruments Inc
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Filing: 1964-08-05
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Granted: 1968-06-25
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Expires: 1984-08-05
Abstract
No abstract record available.
Inventors
- 👤 Donald A Tarver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:58
CPC Classifications
C; C23; C23C; C23C16/00; C23C16/22; C23C16/30; C23C16/32; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9265; Y10S428/933; Y10S428/9335; Y10S428/938; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12535; Y10T428/12576; Y10T428/12771; Y10T428/12806; Y10T428/12826; Y10T428/1284
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1812357A
Cited
US2134305A
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US2113171A
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US2450007A
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US2601023A
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US2714563A
Cited
US2963782A
Cited
US3023490A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-06-25 | 1971-12-25 | 1972-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-06-25 | 1975-12-25 | 1976-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-06-25 | 1979-12-25 | 1980-06-25 | $7700.00 | Window Closed / Lapsed |