Patent US4246903A successfully refreshed from Google Patents.
Patent US2604464A successfully refreshed from Google Patents.
US2604464A
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Reaction product of diphenylolpropane diglycidyl ether with styrene-acrylic acid copolymers
Assignee: PPG Architectural Coatings Canada Inc
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Filing: 1951-05-31
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Granted: 1952-07-22
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Expires: 1971-05-31
Abstract
No abstract record available.
Inventors
- 👤 Segall Gordon Hart
- 👤 Dixon John Francis Clemow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:49
CPC Classifications
C; C08; C08L; C08L63/00; C09; C09D; C09D125/00; C09D125/02; C09D125/04; C09D125/08
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
123 words
A PROCESS FOR THE PREPARATION OF THERMOSET, INFUSIBLE, SOLVENT INSOLUBLE POLYMERS OF STYRENE SUITABLE AS PROTECTIVE COATINGS, WHICH COMPRISES HEATING A THERMOPLASTIC, FUSIBLE, SOLVENT SOLUBLE COPOLYMER OF MORE THAN 50 PARTS OF STYRENE AND AT LEAST 5 PARTS OF AN ACID SELECTED FROM THE GROUP CONSISTING OF ACRYLIC ACID AND METHACRYLIC ACID AND AT LEAST 15 PARTS OF A LOWER ALKYL ESTER OF ACRYLIC ACID, THE TOTAL PARTS BEING 100, WITH ONE MOL OF DIPHENYLOLPROPANE DIGLYCIDYL ETHER FOR EACH TWO FREE CARBOXYLIC ACID GROUPS OF THE COPOLYMER, AT A TEMPERATURE OF ABOUT 150* C. AND IN THE PRESENCE OF AT LEAST 0.5%, BY WEIGHT OF THE COPOLYMER, OF AN ORGANIC BASIC CATALYST SELECTED FROM THE GROUP CONSISTING OF AMINES AND QUATERNARY AMMONIUM COMPOUNDS.
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) | 1955-07-22 | 1956-01-21 | 1956-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-22 | 1960-01-21 | 1960-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-22 | 1964-01-21 | 1964-07-22 | $7700.00 | Window Closed / Lapsed |