Patent US3069390A successfully refreshed from Google Patents.
US3069390A
Expired / Lapsed
US
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Polymeric amides from polymeric acrylic acid esters and n-aminoalkyl alkanol amines and reaction products therefrom
Assignee: Hexion Inc
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Filing: 1959-07-17
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Granted: 1962-12-18
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Expires: 1979-07-17
Abstract
No abstract record available.
Inventors
- 👤 Milton W Kline
- 👤 Robert B Dean
- 👤 Loshaek Samuel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:46
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/30; C08F8/32; C08F8/28; C08F2800/00; C08F2800/20; C08F2810/00; C08F2810/20; Y; Y10; Y10S; Y10S424/00; Y10S424/01; Y10S424/02
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
131 words
IN MAKING A POLYMERIC AMIDE, THE PROCESS WHICH COMPRISES DISSOLVING A POLYMER OF A C1-C4 ALKYL ESTER OF AN ACID SELECTED FROM THE GROUP CONSISTING OF ACRYLIC AND METHACRYLIC ACIDS AND AN N-AMINOALKYL ALKANOL AMINE, THE AMINE HAVING 2-8 CARBON ATOMS IN EACH OF THE AMINOALKYL AND ALKANOL RADICALS, CONTAINING PRIMARY AND SECONDARY AMINE GROUPS, AND BEING USED IN AMOUNT PROVIDING IN EXCESS OF 1 AMINE GROUP FOR 1 MOLE OF THE SAID ESTER, IN A LIQUID CHEMICALLY INERT TO AND A SOLVENT FOR THE SAID AMINE AND ESTER AND A NON-SOLVENT FOR THE REACTION PRODUCT THEREOF,HEATING THE RESULTING SOLUTION UNTIL A REACTION PRODUCT PRECIPITATES AND UNTIL THE PRECIPITATION SUBSTANTIALLY CEASES, AND THEN REMOVING THE SAID LIQUID FROM THE SAID PRECIPITATED PRODUCT, THE SAID PRODUCT BEING A WATER SOLUBLE POLYMERIC AMIDE.
Claim 2
Dependent Claim
131 words
IN MAKING A POLYMERIC AMIDE, THE PROCESS WHICH COMPRISES DISSOLVING A POLYMER OF A C1-C4 ALKYL ESTER OF AN ACID SELECTED FROM THE GROUP CONSISTING OF ACRYLIC AND METHACRYLIC ACIDS AND AN N-AMINOALKYL ALKANOL AMINE, THE AMINE HAVING 2-8 CARBON ATOMS IN EACH OF THE AMINOALKYL AND ALKANOL RADICALS, CONTAINING PRIMARY AND SECONDARY AMINE GROUPS, AND BEING USED IN AMOUNT PROVIDING IN EXCESS OF 1 AMINE GROUP FOR 1 MOLE OF THE SAID ESTER, IN A LIQUID CHEMICALLY INERT TO AND A SOLVENT FOR THE SAID AMINE AND ESTER AND A NON-SOLVENT FOR THE REACTION PRODUCT THEREOF,HEATING THE RESULTING SOLUTION UNTIL A REACTION PRODUCT PRECIPITATES AND UNTIL THE PRECIPITATION SUBSTANTIALLY CEASES, AND THEN REMOVING THE SAID LIQUID FROM THE SAID PRECIPITATED PRODUCT, THE SAID PRODUCT BEING A WATER SOLUBLE POLYMERIC AMIDE.
Claim 3
Dependent Claim
54 words
IN MAKING A POLYMERIC AMIDE THE PROCESS WHICH COMPRISES REACTING THE FINAL POLYMERIC AMIDE PRODUCT OF CLAIM 1 WITH AQUEOUS FORMALDEHYDE IN THE PROPORTION OF ABOUT 1-5 MOLES FOR EACH AMIDE GROUP IN THE SAID PRODUCT, AT A PH OF 4-7 AND A TEMPERATURE OF ABOUT 25*-100*C. AND DISCONTINUING THE REACTION BEFORE GELATION OCCURS.
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) | 1965-12-17 | 1966-06-18 | 1966-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-17 | 1970-06-18 | 1970-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-17 | 1974-06-18 | 1974-12-18 | $7700.00 | Window Closed / Lapsed |