Patent US2489125A successfully refreshed from Google Patents.
Patent US2898193A successfully refreshed from Google Patents.
US2898193A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for making titanium nitride
Assignee: NL Industries Inc
•
Filing: 1952-09-16
•
Granted: 1959-08-04
•
Expires: 1972-09-16
Abstract
No abstract record available.
Inventors
- 👤 Espenschied Helmut
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:04
CPC Classifications
C; C01; C01B; C01B21/00; C01B21/06; C01B21/076; C01B21/0765; C01P; C01P2004/00; C01P2004/60; C01P2004/61
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
65 words
METHOD FOR THE PRODUCTION OF TITANIUM NITRIDE COMPRISING SLURRYING A MIXTURE OF AN UNCALCINED TITANIUM HYDRATE PULP, AS OBTAINED BY HYDROLYZING AN ACID TITANIUM SALT SOLUTION, AND FINELY DIVIDED CARBON AND HEATING SAID MIXTURE AT A TEMPERATURE OF FROM 1350* C. TO 1500* C. IN AN ATMOSPHERE OF NITROGEN TO PRODUCE TITANIUM NITRIDE OF A PARTICLE SIZE FROM ABOUT 1 MICRON TO ABOUT 15 MICRONS.
Claim 2
Dependent Claim
65 words
METHOD FOR THE PRODUCTION OF TITANIUM NITRIDE COMPRISING SLURRYING A MIXTURE OF AN UNCALCINED TITANIUM HYDRATE PULP, AS OBTAINED BY HYDROLYZING AN ACID TITANIUM SALT SOLUTION, AND FINELY DIVIDED CARBON AND HEATING SAID MIXTURE AT A TEMPERATURE OF FROM 1350* C. TO 1500* C. IN AN ATMOSPHERE OF NITROGEN TO PRODUCE TITANIUM NITRIDE OF A PARTICLE SIZE FROM ABOUT 1 MICRON TO ABOUT 15 MICRONS.
References Cited (Backward Citations)
GB189612471A
Cited
US957842A
Cited
GB115020A
Cited
US1333819A
Cited
GB122523A
Cited
US1391147A
Cited
US1969061A
Cited
US2166221A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-08-03 | 1963-02-02 | 1963-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-03 | 1967-02-02 | 1967-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-03 | 1971-02-02 | 1971-08-04 | $7700.00 | Window Closed / Lapsed |