US3679642A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydroxyl containing copolymers
Assignee: Whittaker Corp
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Filing: 1970-10-08
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Granted: 1972-07-25
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Expires: 1990-10-08
Abstract
Abstract POLYMERS OF ETHYLENICALLY UNSATURATED MONOMERS, CONTAINING (A) AT LEAST 5% BY WEIGHT OF THE TOTAL POLYMER OF ETHYLENICALLY UNSTURATED CARBOXYLIC ACID MONOMER UNITS HAVING ACTIVE HYDROEN ATOMS REPLACED WITH -CH2-CH(-OH)-CH2-OOC-R, AND HO-CH2-CH2-CH2-OOC-R RADICALS, WHEREIN R IS A TERTIARY ALIPHATIC HYDROCARBON RADICAL HAVING THE STRUCTURE -C(-R1)(-R2)-R3 WHERE R1 IS-CH3 AND R2 AND R3 ARE ALKYL GROUPS OF 1-12 CARBON ATOMS; AND (B) UP THROUGH 10% BY WEIGHT OF THE TOTAL POLYMER OF VINYL PYRROLIDONE UNITS, AND COATING COMPOSITIOS CONTAINING SUCH POLYMERS.
Inventors
- 👤 Joseph A Vasta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:02
CPC Classifications
C; C09; C09D; C09D125/00; C09D125/02; C09D125/04; C09D125/08; C09D125/14; C08; C08L; C08L61/00; C08L61/20; C08L63/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-25 | 1976-01-24 | 1976-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-25 | 1980-01-24 | 1980-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-25 | 1984-01-24 | 1984-07-25 | $7700.00 | Window Closed / Lapsed |