Patent US3644580A successfully refreshed from Google Patents.
US3644580A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copolymers of propylene and an amino-substituted acrylic comonomer
Assignee: Dart Industries Inc
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Filing: 1970-02-16
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Granted: 1972-02-22
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Expires: 1990-02-16
Abstract
Abstract A SUBSTANTIALLY LINEAR COPOLYMER OF PROPYLENE AND AN AMINO-SUBSTITUTED ACRYLIC COMONOMER IS DISCLOSED WHICH IS SUSCEPTIBLE TO DYEING AND PRINTING.THE COPOLYMER COMPRISES A FIRST SEGMENT WHICH IS A CRYSTALLINE PROPYLENE POLYMER AND HAVING ATTACHED TO AN END THEREOF A SECOND SEGMENT WHICH IS A POLYMER OF AN AMINO-SUBSTITUTED ACRYLIC MONOMER HAVING THE FORMULA CH2=C(-R)-COO-R''-N(-R")-R"'' WHEREIN R IS HYDROGEN OR A METHYL GROUP, R'' IS AN ALKYLENE GROUP HAVING 1 TO 8 CARBON ATOMS AND R" AND R"'' ARE HYDROGEN OR ALKYL GROUPS HAVING 1 TO 4 CARBON ATOMS.
Inventors
- 👤 William J Craven
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:11
CPC Classifications
C; C08; C08F; C08F293/00
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) | 1975-02-21 | 1975-08-23 | 1976-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-21 | 1979-08-23 | 1980-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-21 | 1983-08-23 | 1984-02-22 | $7700.00 | Window Closed / Lapsed |