US3131089A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carbon article coated with boron carbide and boron nitride, and process of making the same
Assignee: Union Carbide Corp
•
Filing: 1961-01-25
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Granted: 1964-04-28
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Expires: 1981-01-25
Abstract
No abstract record available.
Inventors
- 👤 Carl A Grulke
- 👤 Willie H Watts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:25
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/009; C04B35/00; C04B35/515; C04B35/52; C04B41/45; C04B41/50; C04B41/5053; C04B41/5062; C04B41/5064; C04B41/80; C04B41/81; C04B41/85; C04B41/87; Y; Y10; Y10T; Y10T428/00; Y10T428/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
25 words
A CARBON ARTICLE HAVING A CONTINUOUS OUTER COATING OF BORON NITRIDE AND AN INTERMEDIATE CONTINUOUS REGION OF BORON CARBIDE BETWEEN SAID CARBON AND BORON NITRIDE.
Claim 2
Dependent Claim
25 words
A CARBON ARTICLE HAVING A CONTINUOUS OUTER COATING OF BORON NITRIDE AND AN INTERMEDIATE CONTINUOUS REGION OF BORON CARBIDE BETWEEN SAID CARBON AND BORON NITRIDE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-04-28 | 1967-10-28 | 1968-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-28 | 1971-10-28 | 1972-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-28 | 1975-10-28 | 1976-04-28 | $7700.00 | Window Closed / Lapsed |