US3756841A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chloride tio2 pigments suited for high solids low viscosity slurries
Assignee: EIDP Inc
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Filing: 1971-06-30
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Granted: 1973-09-04
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Expires: 1991-06-30
Abstract
Abstract CHLORIDE TIO2 PIGMENTS ARE GIVEN A TREATMENT TO RENDER THEM SUITABLE FOR PREPARING OF HIGH SOLIDS, LOW VIS COSITY AQUEOUS SLURRIES, I.E., SO THAT THEY ARE SUITABLE FOR THE PAPERMAKING INDUSTRY. THE TREATMENT INVOLVES CALCINATION OF THE CHLORIDE TIO2 PARTICLES IN THE PRESENCE OF PARTICULAR QUANITITIES OF ALKALI METAL AND PHOSPHORUS FOLLOWED BY DRY MILLING WITH AN AMINE DISPERSING AGENT.
Inventors
- 👤 T Beliveau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:25
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/36; C09C1/3692; C09C3/00; C09C3/006; C09C3/04; C09C3/041; C09C3/043; C09C3/08; C01; C01P; C01P2006/00; C01P2006/20
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) | 1976-09-03 | 1977-03-05 | 1977-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-03 | 1981-03-05 | 1981-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-03 | 1985-03-05 | 1985-09-04 | $7700.00 | Window Closed / Lapsed |