US3702773A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alkanolamine stabilized high solids titanium dioxide slurry
Assignee: EIDP Inc
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Filing: 1971-07-21
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Granted: 1972-11-14
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Expires: 1991-07-21
Abstract
Abstract A STABILIZED AQUEOUS TITANIUM DIOXIDE PIGMENT SLURRY OF FROM ABOUT 60 TO 82 PERCENT BY WEIGHT TITANIUM DIOXIDE IS USEFUL IN THE MANUFACTURE OF PAPER. ABOUT FROM 10 TO 45 PERCENT OF THE TOTAL TITANIUM, DIOXIDE IN THE SLURRY IS A FIRST PORTION TITANIUM DIOXIDE WHICH IS ALUMINA TREATED POLYPHOSPHATE DISPERSED TITANIUM DIOXIDE; A SECOND PORTION TITANIUM DIOXIDE COMPRISING THE REMAINDER OF THE TOTAL TITANIUM DIOXIDE IS DRY FINISHED TITANIUM DIOXIDE WHICH HAS BEEN GROUND IN THE PRESENCE OF AN ALKANOLAMINE. THE SLURRY IS THEN TREATED WITH A SECOND ALKANOLAMINE. PERFERABLY, THE SLURRY IS SUBJECTED TO HIGH SHEAR MILLING.
Inventors
- 👤 Elmer Linwood Hall
- 👤 John Thomas Looby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:44
CPC Classifications
C; C09; C09D; C09D17/00; C09D17/004; C09D17/007; C09D17/008
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-11-14 | 1976-05-15 | 1976-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-11-14 | 1980-05-15 | 1980-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-11-14 | 1984-05-15 | 1984-11-14 | $7700.00 | Window Closed / Lapsed |