US4017324A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Clay slurries
Assignee: IMC Chemical Group Inc
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Filing: 1974-02-19
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Granted: 1977-04-12
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Expires: 1994-02-19
Abstract
Abstract A clay slurry containing 50% or more of non-volatile solids comprising calcined kaolin clay and from 8 - 331/3% of hydrated kaolin clay based on the weight of the calcined clay. Additionally the slurry contains from 0.01% to 10% of a suspending agent such as bentonite clay, hydroxyethyl cellulose, methyl cellulose, carboxymethyl cellulose and a dispersant such as a non-ionic surfactant, an anionic surfactant or an alkanolamine.
Inventors
- 👤 Warren J. Eggers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:35
CPC Classifications
C; C04; C04B; C04B33/00; C04B33/02; C04B33/13; C09; C09D; C09D17/00; C09D17/004
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
55 words
An aqueous slurry of kaolin clay, water, a suspending agent and a dispersant and exhibiting minimum settling, the clay portion consisting essentially of calcined kaolin clay and hydrated kaolin clay in a ratio of about 2.75 parts of said calcined clay to one of said hydrated clay at a total clay content of about 75%.
Claim 2
Dependent Claim
55 words
An aqueous slurry of kaolin clay, water, a suspending agent and a dispersant and exhibiting minimum settling, the clay portion consisting essentially of calcined kaolin clay and hydrated kaolin clay in a ratio of about 2.75 parts of said calcined clay to one of said hydrated clay at a total clay content of about 75%.
Claim 3
Dependent Claim
50 words
An aqueous slurry of kaolin clay, water, a suspending agent and a dispersant and exhibiting minimum settling, the clay portion consisting essentially of calcined kaolin clay, about 245 parts, and hydrated kaolin clay, about 80 parts, for a ratio of about 3:1 at a total clay content of about 65%.
Claim 4
Dependent Claim
50 words
An aqueous slurry of kaolin clay, water, a suspending agent and a dispersant and exhibiting minimum settling, the clay portion consisting essentially of calcined kaolin clay, about 245 parts, and hydrated kaolin clay, about 80 parts, for a ratio of about 3:1 at a total clay content of about 65%.
Claim 5
Dependent Claim
50 words
An aqueous slurry of kaolin clay, water, a suspending agent and a dispersant and exhibiting minimum settling, the clay portion consisting essentially of calcined kaolin clay, about 262.5 parts, and hydrated kaolin clay, about 87.5 parts, for a ratio of about 3:1 at a total clay content of about 70%.
Claim 6
Dependent Claim
50 words
An aqueous slurry of kaolin clay, water, a suspending agent and a dispersant and exhibiting minimum settling, the clay portion consisting essentially of calcined kaolin clay, about 262.5 parts, and hydrated kaolin clay, about 87.5 parts, for a ratio of about 3:1 at a total clay content of about 70%.
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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) | 1980-04-11 | 1980-10-11 | 1981-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-04-11 | 1984-10-11 | 1985-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-04-11 | 1988-10-11 | 1989-04-12 | $7700.00 | Window Closed / Lapsed |