US3222278A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for improving the yield of an attapulgite clay
Assignee: Monsanto Co
•
Filing: 1962-04-20
•
Granted: 1965-12-07
•
Expires: 1982-04-20
Abstract
No abstract record available.
Inventors
- 👤 Paul D Harryman
- 👤 David T Oakes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:49
CPC Classifications
C; C04; C04B; C04B33/00; C04B33/02; C04B33/13; C04B33/1305; C09; C09K; C09K8/00; C09K8/02; C09K8/04; C09K8/14; C09K8/145; Y; Y10; Y10S; Y10S507/00; Y10S507/901
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
THE METHOD OF IMPROVING THE YIELD OF AN ATTAPULGITE CLAY WHICH COMPRISES DISPERSING SAID CLAY IN AN AQUEOUOS MEDIUM, AGING SAID DISPERSION FOR A PERIOD OF TIME SUFFICIENT TO AT LEAST PARTIALLY HYDRATE SAID CLAY, AND THEREAFTER ADDING TO SAID DISPERSION AN AMOUNT SUFFICIENT TO INCREASE THE YIELD OF SAID CLAY OF A WATER-SOLUBLE INTERPOLYMER COMPRISING AN OLEFIN HAVING 2 TO 4 CARBON ATOMS AND MALEIC ANHYDRIDE, SAID INTERPOLYMER HAVING A SPECIFIC VISCOSITY OF AT LEAST 0.3.
Claim 2
Independent Claim
77 words
THE METHOD OF IMPROVING THE YIELD OF AN ATTAPULGITE CLAY WHICH COMPRISES DISPERSING SAID CLAY IN AN AQUEOUOS MEDIUM, AGING SAID DISPERSION FOR A PERIOD OF TIME SUFFICIENT TO AT LEAST PARTIALLY HYDRATE SAID CLAY, AND THEREAFTER ADDING TO SAID DISPERSION AN AMOUNT SUFFICIENT TO INCREASE THE YIELD OF SAID CLAY OF A WATER-SOLUBLE INTERPOLYMER COMPRISING AN OLEFIN HAVING 2 TO 4 CARBON ATOMS AND MALEIC ANHYDRIDE, SAID INTERPOLYMER HAVING A SPECIFIC VISCOSITY OF AT LEAST 0.3.
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) | 1968-12-06 | 1969-06-07 | 1969-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-06 | 1973-06-07 | 1973-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-06 | 1977-06-07 | 1977-12-07 | $7700.00 | Window Closed / Lapsed |