Patent US2957754A successfully refreshed from Google Patents.
US2957754A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making metal borides
Assignee: Unifrax I LLC
•
Filing: 1951-10-19
•
Granted: 1960-10-25
•
Expires: 1971-10-19
Abstract
No abstract record available.
Inventors
- 👤 Kenneth C Nicholson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:38
CPC Classifications
C; C01; C01B; C01B35/00; C01B35/02; C01B35/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
51 words
A METHOD OF MAKING METAL BORIDES WHICH COMPRISES PREPARING A STARTING MIXTURE OF BORON CARBIDE, CARBON AND AN OXIDE OF THE METAL THE BORIDE OF WHICH IS TO BE MADE, AND HEATING SAID MIXTURE IN AN INERT ATMOSPHER TO REACT THE INGREDIENTS OF SAID MIXTURE AND FORM THE DESIRED METAL BORIDE.
Claim 2
Independent Claim
51 words
A METHOD OF MAKING METAL BORIDES WHICH COMPRISES PREPARING A STARTING MIXTURE OF BORON CARBIDE, CARBON AND AN OXIDE OF THE METAL THE BORIDE OF WHICH IS TO BE MADE, AND HEATING SAID MIXTURE IN AN INERT ATMOSPHER TO REACT THE INGREDIENTS OF SAID MIXTURE AND FORM THE DESIRED METAL BORIDE.
References Cited (Backward Citations)
US1074672A
Cited
US1913373A
Cited
US1858413A
Cited
GB435754A
Cited
US2088838A
Cited
GB440764A
Cited
US2141617A
Cited
US2201150A
Cited
US2200258A
Cited
GB574170A
Cited
US2456891A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-10-25 | 1964-04-25 | 1964-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-25 | 1968-04-25 | 1968-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-25 | 1972-04-25 | 1972-10-25 | $7700.00 | Window Closed / Lapsed |