Patent US3552939A successfully refreshed from Google Patents.
US3552939A
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Metal carbide coatings on metal substrates
Assignee: Texas Instruments Inc
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Filing: 1967-12-06
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Granted: 1971-01-05
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Expires: 1987-12-06
Abstract
Abstract A METAL SUBSTRATE SELECTED FROM STEEL, NICKEL AND NICKELBASE ALLOYS HAVING A REFRACTORY METAL DIFFUSED INTO A SUBFACE REGION THEREOF IS PROVIDED WITH A COHERENT COAT OF A REFRACTORY METAL CARBIDE ADHERENTYL BONDED TO THE DIFFUSED SURFACE REGION OF THE SUBSTRATE.
Inventors
- 👤 James R Darnell
- 👤 Donald A Tarver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:35
CPC Classifications
C; C23; C23C; C23C28/00; B; B41; B41F; B41F19/00; B41F19/08; C23C10/00; C23C10/60; C23C16/00; C23C16/02; C23C16/0272; C23C16/0281; C23C16/22; C23C16/30; C23C16/32; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12535; Y10T428/12576; Y10T428/12583; Y10T428/12771; Y10T428/12806; Y10T428/12812; Y10T428/12861; Y10T428/12931
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |