US3725100A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for processing kaolin claycoating pigment and improved productthereof
Assignee: BASF Catalysts LLC
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Filing: 1971-02-17
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Granted: 1973-04-03
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Expires: 1991-02-17
Abstract
Abstract A SMALL AMOUNT OF BORIC ACID OR AN ACID-SOLUBLE BORATE SALT IS ADDED TO ACIDIC, BLEACHED KAOLIN CLAY IN THE PRESENCE OF ZINC ION BEFORE DEFLOCCULATING AN AQUEOUS SUSPENSION OF THE CLAY WITH A SODIUM CONDENSED PHOSPHATE SALT.
Inventors
- 👤 W Zentz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:24
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/40; C09C1/42; C01; C01P; C01P2004/00; C01P2004/60; C01P2004/62; C01P2004/80; C01P2006/00; C01P2006/22; C01P2006/60; C01P2006/80
Claims Analysis
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References Cited (Backward Citations)
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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) | 1976-04-02 | 1976-10-02 | 1977-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-02 | 1980-10-02 | 1981-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-02 | 1984-10-02 | 1985-04-03 | $7700.00 | Window Closed / Lapsed |