US3674529A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pigments
Assignee: Imerys Minerals Ltd
•
Filing: 1970-09-08
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Granted: 1972-07-04
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Expires: 1990-09-08
Abstract
Abstract A METHOD OF PREPARING A MIXED PIGMENT WHICH COMPRISES BLENDING TOGETHER (A) AN AQUEOUS SUSPENSION OF A DEFLOCCULATED CALCIUM CARBONATE PIGMENT, AND (B) AN AQUEOUS SUSPENSION OF A FLOCCULATED CLAY PIGMENT, AND DEWATERING THE BLENDED AQUEOUS SUSPENSIONS TO OBTAIN A CAKE OF THE DESIRED MIXED PIGMENT.
Inventors
- 👤 Gerald Lance Toms
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:13
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/40; C09C1/42; C01; C01P; C01P2004/00; C01P2004/60; C01P2004/61; C01P2004/80; C01P2006/00; C01P2006/22
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) | 1975-07-04 | 1976-01-03 | 1976-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-04 | 1980-01-03 | 1980-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-04 | 1984-01-03 | 1984-07-04 | $7700.00 | Window Closed / Lapsed |