US2850357A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Digestion of titanium dioxide slags
Assignee: Wyeth Holdings LLC
•
Filing: 1953-05-11
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Granted: 1958-09-02
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Expires: 1973-05-11
Abstract
No abstract record available.
Inventors
- 👤 Myron L Myers
- 👤 Seldon P Todd
- 👤 Edward W Galloway
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:59
CPC Classifications
C; C22; C22B; C22B34/00; C22B34/10; C22B34/12; C22B34/1236; C22B34/124; C22B34/125
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
63 words
A METHOD OF REDUCING THE TITANOUS SULFATE CONTENT AND CORRESPONDINGLY INCREASING THE TITANIC SULFATE CONTENT OF DIGESTION CAKES PRODUCED BY THE SULFURIC ACID DIGESTION OF TITANIFEROUS SLAGS HAVING A SUBSTANTIAL CONTENT OF TITANOUS COMPOUNDS WHICH COMPRISES DIGESTING SAID SLAGS WITH STRONG SULFURIC ACID AT DIGESTION TEMPERATURES ABOVE ABOUT 150*C. IN THE PRESENCE OF A CARBONACEOUS CATALYST PROMOTING THE OXIDIZING ACTION OF SAID ACID.
Claim 2
Independent Claim
63 words
A METHOD OF REDUCING THE TITANOUS SULFATE CONTENT AND CORRESPONDINGLY INCREASING THE TITANIC SULFATE CONTENT OF DIGESTION CAKES PRODUCED BY THE SULFURIC ACID DIGESTION OF TITANIFEROUS SLAGS HAVING A SUBSTANTIAL CONTENT OF TITANOUS COMPOUNDS WHICH COMPRISES DIGESTING SAID SLAGS WITH STRONG SULFURIC ACID AT DIGESTION TEMPERATURES ABOVE ABOUT 150*C. IN THE PRESENCE OF A CARBONACEOUS CATALYST PROMOTING THE OXIDIZING ACTION OF SAID ACID.
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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) | 1961-09-01 | 1962-03-03 | 1962-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-01 | 1966-03-03 | 1966-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-01 | 1970-03-03 | 1970-09-02 | $7700.00 | Window Closed / Lapsed |