Patent US4034730A successfully refreshed from Google Patents.
Patent US2494492A successfully refreshed from Google Patents.
US2494492A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of rutile titanium dioxide
Assignee: Wyeth Holdings LLC
•
Filing: 1942-01-31
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Granted: 1950-01-10
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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 07:38
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.
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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) | 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 |