US3312640A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Colloidal clay coated with acrylic acid-polyallyl sucrose copolymer
Assignee: Minerals and Chemicals Philipp Corp
•
Filing: 1963-05-21
•
Granted: 1967-04-04
•
Expires: 1983-05-21
Abstract
No abstract record available.
Inventors
- 👤 Thomas H Ferrigno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:00
CPC Classifications
C; C04; C04B; C04B33/00; C04B33/02; C04B33/13; C04B33/1305; B; B01; B01J; B01J19/00; B01J19/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
65 words
A SOLID PARTICULATE COMPOSITION FOR THICKENING AQUEOUS LIQUIDS COMPRISING PARTICLES OF COLLOIDAL ATTAPULGITE CLAY THE SURFACE OF WHICH IS UNIFORMLY COATED WITH A SMALL AMOUNT JOF A COLLOIDALLY DISPERSIBLE POLYMER OF ACRYLIC ACID CROSSLINKED WITH FROM ABOUT 0.75% TO ABOUT 2.0% BY WEIGHT OF POLYALKYL SUCROSE AND A MINOR WEIGHT PERCENT, AS COMPARED WITH THE AMOUNT OF SAID POLYMER, OF A SHORT CHAIN ALKYL AMINE.
Claim 2
Dependent Claim
65 words
A SOLID PARTICULATE COMPOSITION FOR THICKENING AQUEOUS LIQUIDS COMPRISING PARTICLES OF COLLOIDAL ATTAPULGITE CLAY THE SURFACE OF WHICH IS UNIFORMLY COATED WITH A SMALL AMOUNT JOF A COLLOIDALLY DISPERSIBLE POLYMER OF ACRYLIC ACID CROSSLINKED WITH FROM ABOUT 0.75% TO ABOUT 2.0% BY WEIGHT OF POLYALKYL SUCROSE AND A MINOR WEIGHT PERCENT, AS COMPARED WITH THE AMOUNT OF SAID POLYMER, OF A SHORT CHAIN ALKYL AMINE.
References Cited (Backward Citations)
US2923692A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-04-03 | 1970-10-03 | 1971-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-04-03 | 1974-10-03 | 1975-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-04-03 | 1978-10-03 | 1979-04-04 | $7700.00 | Window Closed / Lapsed |