Patent US2935996A successfully refreshed from Google Patents.
Patent US3351428A successfully refreshed from Google Patents.
US3351428A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of refractory hard metal materials
Assignee: Kaiser Aluminum and Chemical Corp
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Filing: 1962-01-29
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Granted: 1967-11-07
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Expires: 1982-01-29
Abstract
No abstract record available.
Inventors
- 👤 Titus Leslie
- 👤 John R Thornberry
- 👤 Richard G Breuer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:16
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/515; C04B35/56; C04B35/563; C01; C01B; C01B32/00; C01B32/90; C01B33/00; C01B33/06; C01B35/00; C01B35/02; C01B35/04; C04B35/5607; C04B35/5611; C04B35/58; C04B35/5805; C04B35/58064; C04B35/58071; C04B35/58078; C04B35/622; C04B35/626; C04B35/63; C04B35/632
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
152 words
IN THE PROCESS FOR THE PRODUCTION OF A HIGH MELTING, REFRACTORY HARD METAL MATERIAL CONSISTING ESSENTIALLY OF AT LEAST ONE OF THE COMPOUNDS SELECTED FROM THE GROUP CONSISTING OF THE CARBIDES OF TITANIUM, ZIRCONIUM, TANTALUM, NIOBIUM, HAFNIUM AND BORON, AND THE BORIDES OF TITANIUM, ZIRCONIUM, TANTALUM, NIOBIUM AND HAFNIUM, COMPRISING PREPARING A REACTION MASS INTO A SELF-SUPPORTING BODY FROM A MIXTURE OF AT LEAST ONE OXIDE FROM THE GROUP CONSISTING OF THE OXIDES OF TITANIUM, ZIRCONIUM, TANTALUM, NIOBIUM, HAFNIUM AND BORON, WITH CARBON, PASSING THE SELF-SUPPORTING BODY THROUGH A HEATING ZONE AND REMOVING REACTION PRODUCTS FROM THE HEATING ZONE, THE IMPROVEMENT WHICH COMPRISES: (A) FORMING THE REACTION MASS INTO A SELF-SUPPORTING HOLLOW-SHAPED BODY WITH A CENTRAL PASSAGEWAY HAVING A CROSS-SECTIONAL AREA OF FROM 0.04 TO 0.75 TIMES THE TOTAL CROSS-SECTIONAL AREA OF THE SHAPED SOLID BODY PLUS PASSAGEWAY, WHEREBY CO GAS FORMED DURING REACTION MAY BE READILY EXITED THROUGH SAID CENTRAL PASSAGEWAY.
Claim 2
Dependent Claim
152 words
IN THE PROCESS FOR THE PRODUCTION OF A HIGH MELTING, REFRACTORY HARD METAL MATERIAL CONSISTING ESSENTIALLY OF AT LEAST ONE OF THE COMPOUNDS SELECTED FROM THE GROUP CONSISTING OF THE CARBIDES OF TITANIUM, ZIRCONIUM, TANTALUM, NIOBIUM, HAFNIUM AND BORON, AND THE BORIDES OF TITANIUM, ZIRCONIUM, TANTALUM, NIOBIUM AND HAFNIUM, COMPRISING PREPARING A REACTION MASS INTO A SELF-SUPPORTING BODY FROM A MIXTURE OF AT LEAST ONE OXIDE FROM THE GROUP CONSISTING OF THE OXIDES OF TITANIUM, ZIRCONIUM, TANTALUM, NIOBIUM, HAFNIUM AND BORON, WITH CARBON, PASSING THE SELF-SUPPORTING BODY THROUGH A HEATING ZONE AND REMOVING REACTION PRODUCTS FROM THE HEATING ZONE, THE IMPROVEMENT WHICH COMPRISES: (A) FORMING THE REACTION MASS INTO A SELF-SUPPORTING HOLLOW-SHAPED BODY WITH A CENTRAL PASSAGEWAY HAVING A CROSS-SECTIONAL AREA OF FROM 0.04 TO 0.75 TIMES THE TOTAL CROSS-SECTIONAL AREA OF THE SHAPED SOLID BODY PLUS PASSAGEWAY, WHEREBY CO GAS FORMED DURING REACTION MAY BE READILY EXITED THROUGH SAID CENTRAL PASSAGEWAY.
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) | 1970-11-06 | 1971-05-08 | 1971-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-06 | 1975-05-08 | 1975-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-06 | 1979-05-08 | 1979-11-07 | $7700.00 | Window Closed / Lapsed |