US2494492A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of rutile titanium dioxide
Assignee: Wyeth Holdings LLC
•
Filing: 1942-01-31
•
Granted: 1950-01-10
•
Expires: 1962-01-31
Abstract
No abstract record available.
Inventors
- 👤 Lawrence E Ross
- 👤 Jr Charles A Tanner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 00:44
CPC Classifications
C; C01; C01G; C01G23/00; C01G23/04; C01G23/047; C01G23/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
A PROCESS FOR PREPARING A RUTILE SEEDING AGENT, WHICH COMPRISES TREATING AN ALKALI METAL TITANATE WITH A MONOBASIC ACID IN SUFFICIENT AMOUNT TO COMPLETELY CONVERT THE ALKALI METAL CONTENT TO THE SALT OF THE MONOBASIC ACID AND TO THEORETICALLY CONVERT ABOUT 20% TO 50% OF THE TITANIUM CONTENT TO THE SALT OF THE MONOBASIC ACID, AND BOILING THE RESULTANT MIXTURE FOR ABOUT ONE HOUR, WHEREBY THE TITANIUM CONTENT IS SUBSTANTIALLY CONVERTED TO A RUTILE CONVERSION SEED SHOWING RUTILE STRUCTURE UPON X-RAY ANALYSIS.
Claim 2
Dependent Claim
82 words
A PROCESS FOR PREPARING A RUTILE SEEDING AGENT, WHICH COMPRISES TREATING AN ALKALI METAL TITANATE WITH A MONOBASIC ACID IN SUFFICIENT AMOUNT TO COMPLETELY CONVERT THE ALKALI METAL CONTENT TO THE SALT OF THE MONOBASIC ACID AND TO THEORETICALLY CONVERT ABOUT 20% TO 50% OF THE TITANIUM CONTENT TO THE SALT OF THE MONOBASIC ACID, AND BOILING THE RESULTANT MIXTURE FOR ABOUT ONE HOUR, WHEREBY THE TITANIUM CONTENT IS SUBSTANTIALLY CONVERTED TO A RUTILE CONVERSION SEED SHOWING RUTILE STRUCTURE UPON X-RAY ANALYSIS.
References Cited (Backward Citations)
GB149316A
Cited
US1697929A
Cited
US1932087A
Cited
US1922328A
Cited
US1931682A
Cited
GB405669A
Cited
US2029881A
Cited
GB463996A
Cited
US2303306A
Cited
US2301412A
Cited
GB533227A
Cited
US2286882A
Cited
US2292507A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-01-09 | 1953-07-11 | 1954-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-09 | 1957-07-11 | 1958-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-09 | 1961-07-11 | 1962-01-10 | $7700.00 | Window Closed / Lapsed |