Patent US3328127A successfully refreshed from Google Patents.
US3328127A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of refractory hard metal borides
Assignee: Kaiser Aluminum and Chemical Corp
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Filing: 1962-01-31
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Granted: 1967-06-27
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Expires: 1982-01-31
Abstract
No abstract record available.
Inventors
- 👤 Alva C Byrns
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 10:58
CPC Classifications
C; C01; C01B; C01B35/00; C01B35/02; C01B35/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
183 words
A METHOD OF PRODUCING REFRACTORY HARD METAL BORIDES BY A TWO-STAGE PROCESS COMPRISING PREPARING A MIXTURE OF THE OXIDE OF AT LEAST ONE METAL SELECTED FROM THE GROUP CONSISTING OF TITANIUM, ZIRCONIUM, NIOBIUM, TANTALUM AND HAFNIUM OF WHICH THE BORIDE IS TO BE MADE, CARBON, AND A BORON COMPOUND FROM THE GROUP CONSISTING OF BORON OXIDE, BORON CARBIDE, AND BORIC ACID, CHARGING SAID MIXTURE INTO A HEATING ZONE WHEREIN SAID MIXTURE IS HEATED TO A TEMPERATURE WITHIN THE RANGE OF 1100-1500*C. AND OBTAINING CRUDE REFRACTORY HARD METAL BORIDE MATERIAL AS THE FIRST-STAGE PRODUCT, MIXING THE CRUDE BORIDE PRODUCT OF THE FIRST STAGE WITH AT LEAST ONE SUBSTANCE FROM THE GROUP CONSISTING OF AN OXIDE OF AT LEAST ONE METAL OF WHICH THE BORIDE IS TO BE MADE, BORON OXIDE, BORON CARBIDE, REFRACTORY HARD METAL CARBIDES, AND CARBON, IN SUFFICIENT AMOUNT TO PRODUCE SUBSTANTIALLY PURE REFRACTORY HARD METAL BORIDE MATERIAL AS THE FINAL PRODUCT OF THE SECOND STAGE, HEATING SAID LAST MENTIONED MIXTURE OF CRUDE BORIDE TO A TEMPERATURE IN THE RANGE OF 1600-1850*C., AND OBTAINING SUBSTANTIALLY PURE REFRACTORY HARD METAL BORIDE AS AFORESAID.
Claim 2
Independent Claim
183 words
A METHOD OF PRODUCING REFRACTORY HARD METAL BORIDES BY A TWO-STAGE PROCESS COMPRISING PREPARING A MIXTURE OF THE OXIDE OF AT LEAST ONE METAL SELECTED FROM THE GROUP CONSISTING OF TITANIUM, ZIRCONIUM, NIOBIUM, TANTALUM AND HAFNIUM OF WHICH THE BORIDE IS TO BE MADE, CARBON, AND A BORON COMPOUND FROM THE GROUP CONSISTING OF BORON OXIDE, BORON CARBIDE, AND BORIC ACID, CHARGING SAID MIXTURE INTO A HEATING ZONE WHEREIN SAID MIXTURE IS HEATED TO A TEMPERATURE WITHIN THE RANGE OF 1100-1500*C. AND OBTAINING CRUDE REFRACTORY HARD METAL BORIDE MATERIAL AS THE FIRST-STAGE PRODUCT, MIXING THE CRUDE BORIDE PRODUCT OF THE FIRST STAGE WITH AT LEAST ONE SUBSTANCE FROM THE GROUP CONSISTING OF AN OXIDE OF AT LEAST ONE METAL OF WHICH THE BORIDE IS TO BE MADE, BORON OXIDE, BORON CARBIDE, REFRACTORY HARD METAL CARBIDES, AND CARBON, IN SUFFICIENT AMOUNT TO PRODUCE SUBSTANTIALLY PURE REFRACTORY HARD METAL BORIDE MATERIAL AS THE FINAL PRODUCT OF THE SECOND STAGE, HEATING SAID LAST MENTIONED MIXTURE OF CRUDE BORIDE TO A TEMPERATURE IN THE RANGE OF 1600-1850*C., AND OBTAINING SUBSTANTIALLY PURE REFRACTORY HARD METAL BORIDE AS AFORESAID.
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) | 1970-06-26 | 1970-12-26 | 1971-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-06-26 | 1974-12-26 | 1975-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-06-26 | 1978-12-26 | 1979-06-27 | $7700.00 | Window Closed / Lapsed |