US3301830A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sterol esters, methods for making same and uses
Assignee: GAF Chemicals Corp
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Filing: 1963-09-16
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Granted: 1967-01-31
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Expires: 1983-09-16
Abstract
No abstract record available.
Inventors
- 👤 Richard J Nelson
- 👤 George G Tauth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:44
CPC Classifications
A; A61; A61K; A61K9/00; A61K9/0012; A61K9/0014; A61K47/00; A61K47/06; A61K47/28; A61K47/30; A61K47/32; A61K8/00; A61K8/18; A61K8/30; A61K8/63; A61K8/72; A61K8/81; A61K8/8164; A61Q; A61Q19/00; A61K2800/00; A61K2800/40; A61K2800/57; A61Q5/00; A61Q5/06
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
98 words
A WATER-SOLUBLE PARTIAL ESTER OF (A) AN OXYALKYLATED STEROL CONTAINING AT LEAST ABOUT 40% BY WEIGHT CONDENSED ALKYLENE OXIDE OF FROM 2 TO 4 CARBON ATOMS, AND (B) AN ALKALI-SOLUBLE INTERPOLYMER OF AN A,B-UNSATURATED CARBOXYLIC ANHYDRIDE WITH A MONOETHYLENICALLY UNSATURATED MONOMER SELECTED FROM THE GROUP CONSISTING OF ALKYL VINYL ETHERS, OLEVINS, STYRENE, VINYL ESTERS, ACRYLIC ACID AND ACRYLIC ACID DERIVATIVES, THE SAID COMPONENTS OF THE INTERPOLYMER BEING PRESENT IN APPROXIMATELY EQUIMOLAR QUANTITIES AND IN ALTERNATING REPETITIVE ARRANGEMENT, SAID PARTIAL ESTER CONTAINING NOT MORE THAN ABOUT 25% OF THE CARBOXYL GROUP PRESENT AS ESTER GROUPS OF THE OXYALKYLATED STEROL.
Claim 2
Dependent Claim
98 words
A WATER-SOLUBLE PARTIAL ESTER OF (A) AN OXYALKYLATED STEROL CONTAINING AT LEAST ABOUT 40% BY WEIGHT CONDENSED ALKYLENE OXIDE OF FROM 2 TO 4 CARBON ATOMS, AND (B) AN ALKALI-SOLUBLE INTERPOLYMER OF AN A,B-UNSATURATED CARBOXYLIC ANHYDRIDE WITH A MONOETHYLENICALLY UNSATURATED MONOMER SELECTED FROM THE GROUP CONSISTING OF ALKYL VINYL ETHERS, OLEVINS, STYRENE, VINYL ESTERS, ACRYLIC ACID AND ACRYLIC ACID DERIVATIVES, THE SAID COMPONENTS OF THE INTERPOLYMER BEING PRESENT IN APPROXIMATELY EQUIMOLAR QUANTITIES AND IN ALTERNATING REPETITIVE ARRANGEMENT, SAID PARTIAL ESTER CONTAINING NOT MORE THAN ABOUT 25% OF THE CARBOXYL GROUP PRESENT AS ESTER GROUPS OF THE OXYALKYLATED STEROL.
Claim 3
Dependent Claim
43 words
A PROCESS FOR PREPARING PARTIAL ESTERS AS DEFINED IN CLAIM 1 WHICH COMPRISES ADDING THE INTERPOLYMER TO AN AQUEOUS DISPERSION OF THE OXYALKYLATED STEROL, THE LATTER BEING PRESENT IN AN AMOUNT OF AT LEAST 0.01 MOLE PERCENT BASED ON TOTAL MOLES OF REACTANTS.
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) | 1970-01-30 | 1970-08-01 | 1971-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-30 | 1974-08-01 | 1975-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-30 | 1978-08-01 | 1979-01-31 | $7700.00 | Window Closed / Lapsed |