US2562140A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gelled dispersions of copolymer resins
Assignee: Wyeth Holdings LLC
•
Filing: 1947-06-28
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Granted: 1951-07-24
•
Expires: 1967-06-28
Abstract
No abstract record available.
Inventors
- 👤 Jr Edwin H Dafter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:02
CPC Classifications
C; C08; C08F; C08F283/00; C08F283/01
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
A PROCESS FOR PREPARING A LIQUID DISPERSION OF A STABLE GELLED COPOLYMER WHICH COMPRISES PARTIALLY COPOLYMERIZING 50%-66% OF A MIXTURE OF (1) AN ALKYD RESIN COMPRISING THE ESTERIFICATION PRODUCT OF A POLYHYDRIC ALCOHOL AND AN ALPHA BETA UNSATURATED DICARBOXYL ACID AND (2) A REACTIVE MATERIAL HAVING A CH2=C< GROUP AND HAVING A BOILING POINT OF AT LEAST 100* C., IN THE PERSENCE OF 34% TO 50% OF A VOLATILE INERT ORGANIC SOLVENT AND A POLYMERIZATION CATALYST, AGITATING SAID MIXTURE, SOLVENT AND CATALYST UNTIL THE MIXTURE HAS GELLED AND A VISCOSITY OF 300 TO 800 POISES HAS BEEN OBTAINED, THEREAFTER STABILIZING THE GELLED COPOLYMER BY THE ADDITION OF A POLYMERIZATION INHIBITOR.
Claim 2
Dependent Claim
110 words
A PROCESS FOR PREPARING A LIQUID DISPERSION OF A STABLE GELLED COPOLYMER WHICH COMPRISES PARTIALLY COPOLYMERIZING 50%-66% OF A MIXTURE OF (1) AN ALKYD RESIN COMPRISING THE ESTERIFICATION PRODUCT OF A POLYHYDRIC ALCOHOL AND AN ALPHA BETA UNSATURATED DICARBOXYL ACID AND (2) A REACTIVE MATERIAL HAVING A CH2=C< GROUP AND HAVING A BOILING POINT OF AT LEAST 100* C., IN THE PERSENCE OF 34% TO 50% OF A VOLATILE INERT ORGANIC SOLVENT AND A POLYMERIZATION CATALYST, AGITATING SAID MIXTURE, SOLVENT AND CATALYST UNTIL THE MIXTURE HAS GELLED AND A VISCOSITY OF 300 TO 800 POISES HAS BEEN OBTAINED, THEREAFTER STABILIZING THE GELLED COPOLYMER BY THE ADDITION OF A POLYMERIZATION INHIBITOR.
References Cited (Backward Citations)
US2057766A
Cited
US1922272A
Cited
US2318959A
Cited
US2361019A
Cited
US2409633A
Cited
US2429060A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-07-23 | 1955-01-22 | 1955-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-23 | 1959-01-22 | 1959-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-23 | 1963-01-22 | 1963-07-24 | $7700.00 | Window Closed / Lapsed |