Patent US3236797A successfully refreshed from Google Patents.
US3236797A
Expired / Lapsed
US
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Dispersants for organic dispersions
Assignee: Monsanto Co
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Filing: 1960-12-29
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Granted: 1966-02-22
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Expires: 1980-12-29
Abstract
No abstract record available.
Inventors
- 👤 Charles R Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:38
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/44; C09; C09B; C09B67/00; C09B67/0071; C09B67/0084; C09B67/0085; C09B67/0086; Y; Y10; Y10S; Y10S516/00; Y10S516/01; Y10S516/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
IN A PROCESS FOR PREPARING DISPERSIONS OF WATER INSOLUBLE ORGANIC PIGMENTS IN AN AQUEOUS MEDIUM; THE IMPROVEMENT WHICH COMPRISES INCORPORATING IN THE AQUEOUS MEDIUM A SALT OF AN ALKYL ESTER OF AN OLEFIN-MALEIC ANHYDRIDE COPOLYMER IN THE AMOUNT OF 0.1-7.0 WEIGHT PERCENT BASED ON THE WEIGHT OF THE ORGANIC PIGMENT DISPERSED THEREIN; SAID SALT OF AN ALKYL ESTER OF AN OLEFINMALEIC ANHYDRIDE COPOLYMER HAVING IN ITS STRUCTURE A TOTAL OF 3-20 RECURRING GROUPS OF THE FORMULAE:
Claim 2
Dependent Claim
76 words
IN A PROCESS FOR PREPARING DISPERSIONS OF WATER INSOLUBLE ORGANIC PIGMENTS IN AN AQUEOUS MEDIUM; THE IMPROVEMENT WHICH COMPRISES INCORPORATING IN THE AQUEOUS MEDIUM A SALT OF AN ALKYL ESTER OF AN OLEFIN-MALEIC ANHYDRIDE COPOLYMER IN THE AMOUNT OF 0.1-7.0 WEIGHT PERCENT BASED ON THE WEIGHT OF THE ORGANIC PIGMENT DISPERSED THEREIN; SAID SALT OF AN ALKYL ESTER OF AN OLEFINMALEIC ANHYDRIDE COPOLYMER HAVING IN ITS STRUCTURE A TOTAL OF 3-20 RECURRING GROUPS OF THE FORMULAE:
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) | 1969-02-21 | 1969-08-23 | 1970-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-21 | 1973-08-23 | 1974-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-21 | 1977-08-23 | 1978-02-22 | $7700.00 | Window Closed / Lapsed |