Azlactone copolymers
Abstract
Abstract A CROSS-LINKABLE AZLACTONE COPOLYMER CONSISTING ESSENTIALLY OF: (A) 0.5 TO 30 PRECENT OF AN AZLACTONE OF THE FORMULA 2-R3,4-R1,4-R2,5-(O=)-4,5-DIHYDROOXAZOLE WHEREIN R1 AND R2, TAKEN ALONE, ARE EACH THE SAME OR DIFFERENT ALKYL, CYCLOALKYL, ARYL, OR ARALKYL, OR, TAKEN TOGETHER WITH THE CARBON ATOM TO WHICH THEY ARE JOINED, FORM A CARBOCYCLIC OR HETEROCYCLIC RING, AND R3 IS A GROUP CONTAINING A POLYMERIZABLE ETHYLENIC BOND; AND (B) 99.5 TO 70 PRECENT OF ONE OR MORE OLEFINICALLY UNSATURATED MONOMERS COPOLYMERIZABLE THEREWITH, ALL PRECENTAGES BEING BY WEIGHT OF ALL COPOLYMERIZED MONOMERS. METHOD OF MAKING SUCH COPOLYMERS. METHOD OF CROSS-LINKING SAID COPOLYMERS. CROSS-LINKED PRODUCTS OF SAID COPOLYMERS.
Inventors
- 👤 Fritz Kollinsky
- 👤 Klaus Hubner
- 👤 Gerhard Market
Bibliographic Details
Claims Analysis
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-07 | 1974-12-07 | 1975-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-07 | 1978-12-07 | 1979-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-07 | 1982-12-07 | 1983-06-08 | $7700.00 | Window Closed / Lapsed |