Patent US3271336A successfully refreshed from Google Patents.
US3271336A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vinyl ester copolymers
Assignee: Dunlop Rubber Co Ltd
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Filing: 1963-07-25
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Granted: 1966-09-06
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Expires: 1983-07-25
Abstract
No abstract record available.
Inventors
- 👤 Warson Henry
- 👤 Dargan Douglas Stuart William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:27
CPC Classifications
C; C08; C08F; C08F218/00; C08F218/02; C08F218/04; C08F24/00
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
38 words
A COPOLYMER OF A VINYL ESTER AND NOT MORE THAN 0.3% BASED ON THE TOTAL WEIGHT OF MONOMERS OF THE CONDENSATION REACTION PRODUCT OF ACOLEIN WITH A POLYHYDRIC ALCOHOL HAVING AT LEAST THREE HYDROXY GROUPS IN THE MOLECULE.
Claim 2
Dependent Claim
38 words
A COPOLYMER OF A VINYL ESTER AND NOT MORE THAN 0.3% BASED ON THE TOTAL WEIGHT OF MONOMERS OF THE CONDENSATION REACTION PRODUCT OF ACOLEIN WITH A POLYHYDRIC ALCOHOL HAVING AT LEAST THREE HYDROXY GROUPS IN THE MOLECULE.
Claim 3
Independent Claim
50 words
A METHOD FOR THE PRODUCTION OF A COPOLYMER WHICH COMPRISES HEATING AN AQUEOUS EMULSION OF A VINYL ESTER AND NOT MORE THAN 0.3% BASED ON THE TOTAL WEIGHT OF MONOMERS OF THE CONDENSATION REACTION PRODUCT OF ACROLEIN WITH A POLYHYDRIC ALCOHOL HAVING AT LEAST THREE HYDROXY GROUPS IN THE MOLECULLE.
Claim 4
Independent Claim
50 words
A METHOD FOR THE PRODUCTION OF A COPOLYMER WHICH COMPRISES HEATING AN AQUEOUS EMULSION OF A VINYL ESTER AND NOT MORE THAN 0.3% BASED ON THE TOTAL WEIGHT OF MONOMERS OF THE CONDENSATION REACTION PRODUCT OF ACROLEIN WITH A POLYHYDRIC ALCOHOL HAVING AT LEAST THREE HYDROXY GROUPS IN THE MOLECULLE.
Claim 5
Dependent Claim
15 words
A METHOD ACCORDING TO CLAIM 3 WHEREIN THE SAID AQUEOUS EMULLSION INCORPORATES A DISPERSING COLLOID.
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) | 1969-09-05 | 1970-03-07 | 1970-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-05 | 1974-03-07 | 1974-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-05 | 1978-03-07 | 1978-09-06 | $7700.00 | Window Closed / Lapsed |