US3250734A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydroxy interpolymers prepared from partially esterified carboxyl interpolymers and mono-1, 2-epoxides
Assignee: DESOTO CHEMICAL COATINGS Inc
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Filing: 1962-10-10
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Granted: 1966-05-10
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Expires: 1982-10-10
Abstract
No abstract record available.
Inventors
- 👤 Sekmakas Kazys
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:21
CPC Classifications
C; C09; C09D; C09D135/00; C09D135/02; C08; C08F; C08F22/00; C08F22/04; C08F8/00; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/52; C08G63/56; C08G63/58; C09D167/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
156 words
A METHOD OF PRODUCING A STORAGE-STABLE, SOLVENTSOLUBLE NON-GELLED INTERPOLYMER CONTAINING A MALEIC ANHYDRIDE HYDROXY ESTER INTERPOLYMERIZED THEREIN COMPRISING, REACTING A PREFORMED ANHYDRIDE-CONTAINING ADDITION INTERPOLYMER OF A MALEIC ANHYDRIDE WITH ETHYLENICALLY UNSATURATED MATERIAL COPOLYMERIZABLE THEREWITH WITH MONOHYDRIC ALIPHATIC ORGANIC COMPOUND CONTAINING A SINGLE HYDROXYL GROUP AS THE SOLE FUNCTIONAL GROUP THEREOF TO PARTIALLY ESTERIFY ANHYDRIDE GROUPS AND THEREBY FORM SECONDARY CARBOXYL GROUPS, AND REACTING SAID SECONDARY CARBOXYL GROUPS IN THE PRESENCE OF EXCESS MONOHYDRIC ALIPHATIC ORGANIC COMPOUND WITH ORGANIC MONOEPOXIDE CONTAINING A SINGLE OXIRANE GROUP AS THE SOLE FUNCTIONAL GROUP THEREOF, SAID MONOHYDRIC COMPOUND BEING REACTED WITH SAID COPOLYMER TO AN EXTENT OF FROM 90-110% OF HALF ESTERIFICATION OF THE ANHYDRIDE GROUPS OF SAID COPOLYMER, AND SAID MONOEPOXIDE BEING REACTED WITH AT LEAST 20% OF THE SECONDARY CARBOXYL GROUPS MADE AVAILABLE BY REACTION WITH SAID MONOHYDRIC COMPOUND, SAID REACTIONS BEING CONDUCTED AT ELEVATED TEMPERATURE IN THE PRESENCE OF A CATALYTIC PROPORTION OF ALKALI METAL ORGANIC ACID SALT.
Claim 2
Independent Claim
156 words
A METHOD OF PRODUCING A STORAGE-STABLE, SOLVENTSOLUBLE NON-GELLED INTERPOLYMER CONTAINING A MALEIC ANHYDRIDE HYDROXY ESTER INTERPOLYMERIZED THEREIN COMPRISING, REACTING A PREFORMED ANHYDRIDE-CONTAINING ADDITION INTERPOLYMER OF A MALEIC ANHYDRIDE WITH ETHYLENICALLY UNSATURATED MATERIAL COPOLYMERIZABLE THEREWITH WITH MONOHYDRIC ALIPHATIC ORGANIC COMPOUND CONTAINING A SINGLE HYDROXYL GROUP AS THE SOLE FUNCTIONAL GROUP THEREOF TO PARTIALLY ESTERIFY ANHYDRIDE GROUPS AND THEREBY FORM SECONDARY CARBOXYL GROUPS, AND REACTING SAID SECONDARY CARBOXYL GROUPS IN THE PRESENCE OF EXCESS MONOHYDRIC ALIPHATIC ORGANIC COMPOUND WITH ORGANIC MONOEPOXIDE CONTAINING A SINGLE OXIRANE GROUP AS THE SOLE FUNCTIONAL GROUP THEREOF, SAID MONOHYDRIC COMPOUND BEING REACTED WITH SAID COPOLYMER TO AN EXTENT OF FROM 90-110% OF HALF ESTERIFICATION OF THE ANHYDRIDE GROUPS OF SAID COPOLYMER, AND SAID MONOEPOXIDE BEING REACTED WITH AT LEAST 20% OF THE SECONDARY CARBOXYL GROUPS MADE AVAILABLE BY REACTION WITH SAID MONOHYDRIC COMPOUND, SAID REACTIONS BEING CONDUCTED AT ELEVATED TEMPERATURE IN THE PRESENCE OF A CATALYTIC PROPORTION OF ALKALI METAL ORGANIC ACID SALT.
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) | 1969-05-09 | 1969-11-08 | 1970-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-09 | 1973-11-08 | 1974-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-09 | 1977-11-08 | 1978-05-10 | $7700.00 | Window Closed / Lapsed |