US2834651A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of boron carbide
Assignee: Individual
•
Filing: 1953-05-21
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Granted: 1958-05-13
•
Expires: 1973-05-21
Abstract
No abstract record available.
Inventors
- 👤 Gray Edgar Garry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:05
CPC Classifications
C; C01; C01B; C01B32/00; C01B32/90; C01B32/914; C01B32/991
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
A PROCESS FOR THE PRODUCTION OF BORON CARBIDE POWDERS OF DESIRED PARTICLE SIZE, INCLUDING THE STEPS OF HEATING TO A TEMPERATURE WITHIN THE RANGE OF 930*C. TO 2000* C. A CHARGE CONTAINING CARBON, A MATERIAL SELECTED FROM THE GROUP CONSISTING OF BORIC OXIDE (B2O3), ALKALI METAL TETRABORATE, AND ALKALI EARTH METAL TETRABORATE; AND A REDUCING AGENT CONSISTING ESSENTIALLY OF METALLIC MAGNESIUM, AND SUBSEQUENTLY SEPARATING THE BORON CARBIDE BY A LEACHING TREATMENT.
Claim 2
Dependent Claim
71 words
A PROCESS FOR THE PRODUCTION OF BORON CARBIDE POWDERS OF DESIRED PARTICLE SIZE, INCLUDING THE STEPS OF HEATING TO A TEMPERATURE WITHIN THE RANGE OF 930*C. TO 2000* C. A CHARGE CONTAINING CARBON, A MATERIAL SELECTED FROM THE GROUP CONSISTING OF BORIC OXIDE (B2O3), ALKALI METAL TETRABORATE, AND ALKALI EARTH METAL TETRABORATE; AND A REDUCING AGENT CONSISTING ESSENTIALLY OF METALLIC MAGNESIUM, AND SUBSEQUENTLY SEPARATING THE BORON CARBIDE BY A LEACHING TREATMENT.
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) | 1961-05-12 | 1961-11-11 | 1962-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-12 | 1965-11-11 | 1966-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-12 | 1969-11-11 | 1970-05-13 | $7700.00 | Window Closed / Lapsed |