US3141897A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reaction product of maleic anhydride unsaturated fatty acid adduct and polyethylene glycol
Assignee: Ecolab Inc
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Filing: 1961-10-09
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Granted: 1964-07-21
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Expires: 1981-10-09
Abstract
No abstract record available.
Inventors
- 👤 Samuel B Crecelius
- 👤 Thomas E Brunelle
- 👤 Larry M Rue
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:57
CPC Classifications
C; C11; C11C; C11C3/00; C11C3/003; C11D; C11D1/00; C11D1/008; Y; Y10; Y10S; Y10S516/00; Y10S516/01; Y10S516/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
AS A COMPOSITION OF MATTER, A MONOESTER OF SUBSTANTIALLY EQUIMOLAR PROPORTIONS OF A MALEIC ANHYDRIDE UNSATURATED ORGANIC AT LEAST 10 CARBON ATOM CONTAINING FATTY ACID ADDUCT AND A POLYETHYLENE GLYCOL HAVING A MOLECULAR WEIGHT FROM ABOUT 300 TO ABOUT 800, THE SAID MONOESTER BEING FORMED BY OPENING OF THE ANHYDRIDE FUNCTIONAL GROUP OF THE SAID ADDUCT AND REACTION OF THE POLYETHYLENE GLYCOL THEREWITH TO FORM SIMULTANEOUSLY THE MONOESTER AND A FREE CARBOXYL GROUP.
Claim 2
Dependent Claim
73 words
AS A COMPOSITION OF MATTER, A MONOESTER OF SUBSTANTIALLY EQUIMOLAR PROPORTIONS OF A MALEIC ANHYDRIDE UNSATURATED ORGANIC AT LEAST 10 CARBON ATOM CONTAINING FATTY ACID ADDUCT AND A POLYETHYLENE GLYCOL HAVING A MOLECULAR WEIGHT FROM ABOUT 300 TO ABOUT 800, THE SAID MONOESTER BEING FORMED BY OPENING OF THE ANHYDRIDE FUNCTIONAL GROUP OF THE SAID ADDUCT AND REACTION OF THE POLYETHYLENE GLYCOL THEREWITH TO FORM SIMULTANEOUSLY THE MONOESTER AND A FREE CARBOXYL GROUP.
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) | 1967-07-21 | 1968-01-20 | 1968-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-21 | 1972-01-20 | 1972-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-21 | 1976-01-20 | 1976-07-21 | $7700.00 | Window Closed / Lapsed |