US3679442A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hot-pressed titanium nitride-titanium carbide compositions
Assignee: EIDP Inc
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Filing: 1969-11-21
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Granted: 1972-07-25
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Expires: 1989-11-21
Abstract
Abstract SOLID SOLUTIONS OF FROM 10 TO 90 VOLUME PERCENT TITANIUM NITRIDE AND 90 TO 10 VOLUME PERCENT TITANIUM CARBIDE HAVING AN AVERAGE GRAIN SIZE OF LESS THAN 2 MICRONS AND A DENSITY OF AT LEAST 99 PERCENT OF THEORETICAL ARE PREPARED BY HOT-PRESSING AN INTIMATE MIXTURE OF FINE POWDERED TITANIUM NITRIDE AND TITANIUM CARBIDE AT A TEMPERATURE BETWEEN 1750* AND 1900*C. AND A PRESSURE BETWEEN 3000 AND 6000 POUNDS PER SQUARE INCH. THE DENSE COMPOSITIONS ARE VERY STRONG AND HARD AND POSSESS A VERY DESIRABLE COMBINATION OF OXIDATION RESISTANCE, WEAR-RESISTANCE, SCRATCH-RESISTANCE AND CORROSION RESISTANCE.
Inventors
- 👤 Horacio E Bergna
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 01:42
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/515; C04B35/56; C04B35/5607; C04B35/5611; C04B35/58; C04B35/58007; C04B35/58014; C04B35/58021; C04B35/622; C04B35/626; C04B35/62605; C04B35/6261; C04B35/64; C04B35/645; C04B2235/00; C04B2235/02; C04B2235/30; C04B2235/38; C04B2235/3817; C04B2235/3839; C04B2235/3843; C04B2235/3847; C04B2235/3852; C04B2235/3886; C04B2235/3895; C04B2235/50; C04B2235/54; C04B2235/5409; C04B2235/5418; C04B2235/5436; C04B2235/65; C04B2235/656; C04B2235/6565; C04B2235/6567; C04B2235/70; C04B2235/72; C04B2235/74; C04B2235/76; C04B2235/761; C04B2235/77; C04B2235/78; C04B2235/785; C04B2235/786; C04B2235/96; C04B2235/9669; C04B2235/9684
Claims Analysis
Total Claims: 0
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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) | 1975-07-25 | 1976-01-24 | 1976-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-25 | 1980-01-24 | 1980-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-25 | 1984-01-24 | 1984-07-25 | $7700.00 | Window Closed / Lapsed |