Patent US2816877A successfully refreshed from Google Patents.
US2816877A
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Free flowing thermoplastic vinyl ester copolymer granules and method of preparing same
Assignee: Shawinigan Resins Corp
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Filing: 1954-01-08
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Granted: 1957-12-17
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Expires: 1974-01-08
Abstract
No abstract record available.
Inventors
- 👤 Aubrey F Price
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:58
CPC Classifications
C; C08; C08L; C08L31/00; C08L31/02; C08L31/04; C08L35/00; C08L35/02; C08L35/06; C08L29/00; C08L29/02; C08L29/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
139 words
A COMPOSITION COMPRISING FREE FLOWING GRANULES OF AQUEOUS ALKALI SOLUBLE COPOLYMERS OF 10 MOLS OF A VINYL ESTER OF A SATURATED CARBOXYLIC ACID CONTAINING FROM 1 TO 6 CARBON ATOMS WITH FROM 0.05 TO 1.5 MOLS OF AN ACID TAKEN FROM THE CLASS CONSISTING OF UNSATURATED CARBOXYLIC ACIDS CONTAINING FROM 3 TO 6 CARBON ATOMS AND PARTIAL SALTS OF UNSATURATED CARBOXYLIC ACIDS CONTAINING FROM 3 TO 6 CARBON ATOMS, THE GRANULES BEING THOROUGHLY INTERMINGLED WITH FROM 0.1 TO 5% OF THEIR DRY WEIGHT OF A POWDERED AQUEOUS ALKALI-SOLUBLE COPOLYMER TAKEN FROM THE GROUP CONSISTING OF COPOLYMERS OF STYRENE-MALEIC ANHYDRIDE AND COPOLYMERS OF STYRENE WITH PARTIAL ESTERS OF MALEIC ACID, SAID PARTIAL ESTERS BEING THE REACTION PRODUCT OF ONE MOL OF MALEIC ACID WITH UP TO TOTAL OF ONE MOL OF ALKYL ALCOHOL CONTAINING FROM 1 TO 10 CARBONS ATOMS.
Claim 2
Dependent Claim
139 words
A COMPOSITION COMPRISING FREE FLOWING GRANULES OF AQUEOUS ALKALI SOLUBLE COPOLYMERS OF 10 MOLS OF A VINYL ESTER OF A SATURATED CARBOXYLIC ACID CONTAINING FROM 1 TO 6 CARBON ATOMS WITH FROM 0.05 TO 1.5 MOLS OF AN ACID TAKEN FROM THE CLASS CONSISTING OF UNSATURATED CARBOXYLIC ACIDS CONTAINING FROM 3 TO 6 CARBON ATOMS AND PARTIAL SALTS OF UNSATURATED CARBOXYLIC ACIDS CONTAINING FROM 3 TO 6 CARBON ATOMS, THE GRANULES BEING THOROUGHLY INTERMINGLED WITH FROM 0.1 TO 5% OF THEIR DRY WEIGHT OF A POWDERED AQUEOUS ALKALI-SOLUBLE COPOLYMER TAKEN FROM THE GROUP CONSISTING OF COPOLYMERS OF STYRENE-MALEIC ANHYDRIDE AND COPOLYMERS OF STYRENE WITH PARTIAL ESTERS OF MALEIC ACID, SAID PARTIAL ESTERS BEING THE REACTION PRODUCT OF ONE MOL OF MALEIC ACID WITH UP TO TOTAL OF ONE MOL OF ALKYL ALCOHOL CONTAINING FROM 1 TO 10 CARBONS ATOMS.
References Cited (Backward Citations)
US2419880A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-12-16 | 1961-06-17 | 1961-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-16 | 1965-06-17 | 1965-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-16 | 1969-06-17 | 1969-12-17 | $7700.00 | Window Closed / Lapsed |