Patent US4076548A successfully refreshed from Google Patents.
US4076548A
Expired / Lapsed
US
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High bulking clay pigments and method of making the same
Assignee: Georgia Kaolin Co
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Filing: 1976-12-27
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Granted: 1978-02-28
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Expires: 1996-12-27
Abstract
Abstract A high bulk clay product and method of making the same are provided in which kaolinite is selectively flocculated to produce an ultra fine particle fraction in the presence of fine mica below 150 mesh in size and the resulting flocculant is collected and dried.
Inventors
- 👤 Wayne M. Bundy
- 👤 Joseph P. Berberich
- 👤 David Sastre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 03:01
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/40; C09C1/42; C01; C01P; C01P2004/00; C01P2004/60; C01P2004/61; C01P2006/00; C01P2006/60; Y; Y10; Y10S; Y10S106/00; Y10S106/03
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
73 words
A method of improving the opacity of kaolinite comprising the steps of: a. selectively flocculating a kaolinite in the presence of an effective amount of fine mica below 150 mesh in size to cause voids to occur between the particles of kaolinite to recover a mixture of ultrafine particle clay and mica mixture, and b. collecting and drying the selectively flocculated ultrafine kaolinite and mica mixture as a high bulking dry pigment material.
Claim 2
Independent Claim
73 words
A method of improving the opacity of kaolinite comprising the steps of: a. selectively flocculating a kaolinite in the presence of an effective amount of fine mica below 150 mesh in size to cause voids to occur between the particles of kaolinite to recover a mixture of ultrafine particle clay and mica mixture, and b. collecting and drying the selectively flocculated ultrafine kaolinite and mica mixture as a high bulking dry pigment material.
Claim 3
Dependent Claim
29 words
A method as claimed in claim 1 wherein selective flocculation of the kaolinite is carried out by the addition of an organic flocculant having a molecular weight below 1,000,000.
Claim 4
Dependent Claim
25 words
A method as claimed in claim 1 wherein selective flocculation of the kaolinite is carried out by the addition of a polyamine and citric acid.
Claim 5
Dependent Claim
22 words
A method as claimed in claim 1 wherein the selective flocculation was carried out with the addition of ethylenediamine and citric acid.
Claim 6
Dependent Claim
20 words
A high bulking kaolinite consisting essentially of fine particle size kaolinite admixed with mica having a size below 150 mesh.
Claim 7
Dependent Claim
20 words
A high bulking kaolinite consisting essentially of fine particle size kaolinite admixed with mica having a size below 150 mesh.
Claim 8
Dependent Claim
28 words
A high bulking kaolinite as claimed in claim 5 wherein the kaolinite is recovered by selective flocculation with an organic flocculant having a molecular weight less than 1,000,000.
Claim 9
Dependent Claim
24 words
A high bulking kaolinite as claimed in claim 5 wherein the kaolinite is recovered by selective flocculation with a polyamine and citric acid mixture.
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) | 1981-02-27 | 1981-08-29 | 1982-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-27 | 1985-08-29 | 1986-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-27 | 1989-08-29 | 1990-02-28 | $7700.00 | Window Closed / Lapsed |