Patent US3021295A successfully refreshed from Google Patents.
US3021295A
Expired / Lapsed
US
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Process for removing haziness from an aqueous solution of a blend of polymers
Assignee: Wyeth Holdings LLC
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Filing: 1960-03-16
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Granted: 1962-02-13
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Expires: 1980-03-16
Abstract
No abstract record available.
Inventors
- 👤 Saxon Robert
- 👤 Tzeng J Suen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:46
CPC Classifications
C; C08; C08F; C08F6/00; C08F6/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
116 words
A PROCESS FOR REMOVING HAZINESS FROM A HAZY, AQUEOUS RESINOUS SOLUTION COMPRISING PASSING A GAS, THAT IS SUBSTANTIALLY INERT TO THE CONSTITUENTS IN SAID SOLUTION, THROUGH SAID SOLUTION AT A TEMPERATURE BETWEEN ABOUT 3*C. AND REFLUX UNTIL THE HAZE HAS BEEN SUBSTANTIALLY COMPLETELY DISSIPATED, WHEREIN SAID RESINOUS SOLUTION IN A MIXTURE OF (1) 50% TO 10% BY WEIGHT OF A WATER-SOLUBLE POTENTIALLY THERMOSETTING POLYMETHYL ETHER OF A POLYMETHYLOL MELAMINE AND (2) 50% TO 90% BY WEIGHT OF A WATER SOLUBLE AMMONIUM SALT OF A COPOLYMER COMPRISING (A) 5% TO 50% BY WEIGHT OF AN ETHYLENICALLY UNSATURATED CARBOXYLIC ACID AND (B) 50% TO 95% BY WEIGHT OF AN ALKYL ESTER OF AN ALPHA, BETA-ETHYLENICALLY UNSATURATED MONOCARBOXYLIC ACID.
Claim 2
Dependent Claim
116 words
A PROCESS FOR REMOVING HAZINESS FROM A HAZY, AQUEOUS RESINOUS SOLUTION COMPRISING PASSING A GAS, THAT IS SUBSTANTIALLY INERT TO THE CONSTITUENTS IN SAID SOLUTION, THROUGH SAID SOLUTION AT A TEMPERATURE BETWEEN ABOUT 3*C. AND REFLUX UNTIL THE HAZE HAS BEEN SUBSTANTIALLY COMPLETELY DISSIPATED, WHEREIN SAID RESINOUS SOLUTION IN A MIXTURE OF (1) 50% TO 10% BY WEIGHT OF A WATER-SOLUBLE POTENTIALLY THERMOSETTING POLYMETHYL ETHER OF A POLYMETHYLOL MELAMINE AND (2) 50% TO 90% BY WEIGHT OF A WATER SOLUBLE AMMONIUM SALT OF A COPOLYMER COMPRISING (A) 5% TO 50% BY WEIGHT OF AN ETHYLENICALLY UNSATURATED CARBOXYLIC ACID AND (B) 50% TO 95% BY WEIGHT OF AN ALKYL ESTER OF AN ALPHA, BETA-ETHYLENICALLY UNSATURATED MONOCARBOXYLIC ACID.
References Cited (Backward Citations)
US2906724A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-02-12 | 1965-08-14 | 1966-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-12 | 1969-08-14 | 1970-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-12 | 1973-08-14 | 1974-02-13 | $7700.00 | Window Closed / Lapsed |