Patent US2998302A successfully refreshed from Google Patents.
US2998302A
Expired / Lapsed
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Preparation of titanium diboride
Assignee: Union Carbide Corp
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Filing: 1958-06-25
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Granted: 1961-08-29
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Expires: 1978-06-25
Abstract
No abstract record available.
Inventors
- 👤 Robert A Mercuri
- 👤 Jr John M Fian
- 👤 Edwin M Nelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:27
CPC Classifications
C; C01; C01B; C01B35/00; C01B35/02; C01B35/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
A PROCESS OF MAKING FINE PARTICLE TITANIUM DIBORIDE COMPRISING BLENDING TITANIUM DIOXIDE OF A PARTICLE SIZE SMALLER THAN ABOUT 100 MESH WITH BORIC OXIDE OF A PARTICLE SIZE AT MOST ABOUT 60 MESH, ADDING SAID BLEND TO A MOLTEN SODIUM BATH AT A TEMPERATURE BETWEEN 450* C. AND 880*C. AGITATING SAID BATH UNTIL THE REACTION IS COMPLETE, COOLING THE REACTION MIXTURE AND RECOVERING LESS THAN ABOUT 50 MICRON PARTICLE SIZE TITANIUM DIBORIDE OF AT LEAST 95% PURITY.
Claim 2
Dependent Claim
77 words
A PROCESS OF MAKING FINE PARTICLE TITANIUM DIBORIDE COMPRISING BLENDING TITANIUM DIOXIDE OF A PARTICLE SIZE SMALLER THAN ABOUT 100 MESH WITH BORIC OXIDE OF A PARTICLE SIZE AT MOST ABOUT 60 MESH, ADDING SAID BLEND TO A MOLTEN SODIUM BATH AT A TEMPERATURE BETWEEN 450* C. AND 880*C. AGITATING SAID BATH UNTIL THE REACTION IS COMPLETE, COOLING THE REACTION MIXTURE AND RECOVERING LESS THAN ABOUT 50 MICRON PARTICLE SIZE TITANIUM DIBORIDE OF AT LEAST 95% PURITY.
References Cited (Backward Citations)
US2735155A
Cited
US2678870A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-08-28 | 1965-02-27 | 1965-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-28 | 1969-02-27 | 1969-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-28 | 1973-02-27 | 1973-08-29 | $7700.00 | Window Closed / Lapsed |