US2895822A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat-resistant alloys
Assignee: Renault SA
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Filing: 1954-03-09
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Granted: 1959-07-21
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Expires: 1974-03-09
Abstract
No abstract record available.
Inventors
- 👤 Peras Lucien
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:59
CPC Classifications
C; C22; C22C; C22C29/00; C22C29/02; C22C29/06; C22C29/10; B; B22; B22F; B22F2998/00; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12181
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
145 words
A METHOD OF PREPARING HARD, TOUGH ALLOYS HAVING A DENSITY OF LESS THAN 5.0 GM./CM.3 AND HAVING THE PROPERTTY OF RETAINING THEIR HARDNESS AND TOUGHNESS UP TO A TEMPERATURE OF 1200* C., WHICH COMPRISES INTIMATELY COMBINING TITANIUM HYDRIDE AND TITANIUM CARBIDE INTO A PULVERULENT MIXTURE, THE CARBON AND THE TITANIUM BEING IN SUBSTANTIALLY EQUIATOMIC PROPORTTIONS, AND THE PERCENTAGE OF TITANIUM HYDRIDE IN THE MIXTURE LYING BETWEEN 10% AND 35%, COMPRESSING THE PULVERULENT MIXTURE INTO BRIQUETTES OF SUFFICIENT COHESION TO BE HANDLED, HEATING THE BRIQUETTES TO A TEMPERATURE SUFFICIENT TO ELIMINATE HYDROGEN COMPLETELY FROM THE HYDRIDE, DISINTEGRATING THE THUS-HEATED BRIQUETTES, COMPRESSING THE PARTICLES OF THE DISINTEGRATED BRIQUETTES IN A MOLD, AND HEATING THE MATERIAL IN A MOLD IN AN INERT ATMOSPHERE TO A TEMPERATURE BETWEEN 1900 AND 2300* C., WHEREBY TO FORM A POLYCRYSTALLINE SUBSTANCE CONSISTING OF HOMOGENEOUS FINE GRAINS FREE FROM ANY INTERGRANULAR BINDING AGENT.
Claim 2
Independent Claim
145 words
A METHOD OF PREPARING HARD, TOUGH ALLOYS HAVING A DENSITY OF LESS THAN 5.0 GM./CM.3 AND HAVING THE PROPERTTY OF RETAINING THEIR HARDNESS AND TOUGHNESS UP TO A TEMPERATURE OF 1200* C., WHICH COMPRISES INTIMATELY COMBINING TITANIUM HYDRIDE AND TITANIUM CARBIDE INTO A PULVERULENT MIXTURE, THE CARBON AND THE TITANIUM BEING IN SUBSTANTIALLY EQUIATOMIC PROPORTTIONS, AND THE PERCENTAGE OF TITANIUM HYDRIDE IN THE MIXTURE LYING BETWEEN 10% AND 35%, COMPRESSING THE PULVERULENT MIXTURE INTO BRIQUETTES OF SUFFICIENT COHESION TO BE HANDLED, HEATING THE BRIQUETTES TO A TEMPERATURE SUFFICIENT TO ELIMINATE HYDROGEN COMPLETELY FROM THE HYDRIDE, DISINTEGRATING THE THUS-HEATED BRIQUETTES, COMPRESSING THE PARTICLES OF THE DISINTEGRATED BRIQUETTES IN A MOLD, AND HEATING THE MATERIAL IN A MOLD IN AN INERT ATMOSPHERE TO A TEMPERATURE BETWEEN 1900 AND 2300* C., WHEREBY TO FORM A POLYCRYSTALLINE SUBSTANCE CONSISTING OF HOMOGENEOUS FINE GRAINS FREE FROM ANY INTERGRANULAR BINDING AGENT.
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) | 1962-07-20 | 1963-01-19 | 1963-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-07-20 | 1967-01-19 | 1967-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-07-20 | 1971-01-19 | 1971-07-21 | $7700.00 | Window Closed / Lapsed |