Patent US3032431A successfully refreshed from Google Patents.
US3032431A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Kaolin clay coated with salt of polymerizable acid
Assignee: Minerals and Chemicals Philipp Corp
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Filing: 1960-01-12
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Granted: 1962-05-01
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Expires: 1980-01-12
Abstract
No abstract record available.
Inventors
- 👤 Thomas H Ferrigno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:15
CPC Classifications
C; C04; C04B; C04B20/00; C04B20/10; C04B20/1018; C08; C08K; C08K9/00; C08K9/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
62 words
FRACTIONATED KAOLIN CLAY WHICH IS SUBSTANTIALLY FREE FROM PARTICLES LARGER THAN 44 MICRONS AND HAS AN AVERAGE EQUIVALENT SPHERICAL DIAMETER OF AT LEAST 1.5 MICRONS, THE PARTICLES OF SAID CLAY BEING UNIFORMLY COATED WITH FROM 0.25 PERCENT TO 5.0 PERCENT BY WEIGHT OF A DIVALENT METAL SALT OF A POLYMERIZABLE ACID SELECTED FROM THE GROUP CONSISTING OF ACRYLIC, CROTONIC, METHACRYLIC AND SORBIC.
Claim 2
Dependent Claim
62 words
FRACTIONATED KAOLIN CLAY WHICH IS SUBSTANTIALLY FREE FROM PARTICLES LARGER THAN 44 MICRONS AND HAS AN AVERAGE EQUIVALENT SPHERICAL DIAMETER OF AT LEAST 1.5 MICRONS, THE PARTICLES OF SAID CLAY BEING UNIFORMLY COATED WITH FROM 0.25 PERCENT TO 5.0 PERCENT BY WEIGHT OF A DIVALENT METAL SALT OF A POLYMERIZABLE ACID SELECTED FROM THE GROUP CONSISTING OF ACRYLIC, CROTONIC, METHACRYLIC AND SORBIC.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-04-30 | 1965-10-30 | 1966-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-30 | 1969-10-30 | 1970-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-30 | 1973-10-30 | 1974-05-01 | $7700.00 | Window Closed / Lapsed |