Patent US4097567A successfully refreshed from Google Patents.
US4097567A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Titanium diboride shapes
Assignee: Alcoa Corp
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Filing: 1976-08-25
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Granted: 1978-06-27
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Expires: 1996-08-25
Abstract
Abstract The method including blending 90 parts by weight titanium diboride and 10 parts by weight boron nitride, cold isostatically pressing the blend to a shape at 60,000 pounds per square inch pressure, and sintering the shape at 1975 DEG C in an inert atmosphere.
Inventors
- 👤 Walter S. Cebulak
- 👤 John D. Weyand
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:33
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/515; C04B35/58; C04B35/5805; C04B35/58064; C04B35/58071
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
52 words
The method comprising blending a mixture consisting of 90 parts by weight titanium diboride and 10 parts by weight boron nitride, cold isostatically pressing the blend to a shape at 60,000 pounds per square inch pressure, and sintering the shape at 1975° C in an inert atmosphere in the absence of pressure.
Claim 2
Independent Claim
52 words
The method comprising blending a mixture consisting of 90 parts by weight titanium diboride and 10 parts by weight boron nitride, cold isostatically pressing the blend to a shape at 60,000 pounds per square inch pressure, and sintering the shape at 1975° C in an inert atmosphere in the absence of pressure.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-06-26 | 1981-12-26 | 1982-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-06-26 | 1985-12-26 | 1986-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-06-26 | 1989-12-26 | 1990-06-27 | $7700.00 | Window Closed / Lapsed |