Patent US2560680A successfully refreshed from Google Patents.
US2560680A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acrylonitrile copolymers
Assignee: Akzo Nobel UK PLC
•
Filing: 1948-09-03
•
Granted: 1951-07-17
•
Expires: 1968-09-03
Abstract
No abstract record available.
Inventors
- 👤 Arthur L Allewelt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:33
CPC Classifications
C; C08; C08F; C08F220/00; C08F220/02; C08F220/42; C08F220/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
THE PROCESS OF COPOLYMERIZING ACRYLONITRILE WITH AN MONO-AMIDE, HAVING A SINGLE UNSATURATED CARBON TO CARBON BOND AND A SINGLE CARBONYL GROUP ATTACHED TO THEN ATOM, OF AN ACID OF THE GROUP CONSISTING OF ACRYLIC ACID AND ALPHA-ALKYLSUBSTITUTED ACRYLIC ACIDS, IN ISOPROPYL ALCOHOL IN THE PRESENCE OF A CATALYST, THE MONOMER TO SOLVENT DILUTION RATIO BEING IN THE RANGE OF 10:8 TO 10:20 PARTS BY WEIGHT AND THE ACRYLONITRILE BEING PRESENT IN A PROPORTION BETWEEN ABOUT 55 AND ABOUT 93% BY WEIGHT OF THE TOTAL WEIGHT OF THE MONOMERS.
Claim 2
Dependent Claim
88 words
THE PROCESS OF COPOLYMERIZING ACRYLONITRILE WITH AN MONO-AMIDE, HAVING A SINGLE UNSATURATED CARBON TO CARBON BOND AND A SINGLE CARBONYL GROUP ATTACHED TO THEN ATOM, OF AN ACID OF THE GROUP CONSISTING OF ACRYLIC ACID AND ALPHA-ALKYLSUBSTITUTED ACRYLIC ACIDS, IN ISOPROPYL ALCOHOL IN THE PRESENCE OF A CATALYST, THE MONOMER TO SOLVENT DILUTION RATIO BEING IN THE RANGE OF 10:8 TO 10:20 PARTS BY WEIGHT AND THE ACRYLONITRILE BEING PRESENT IN A PROPORTION BETWEEN ABOUT 55 AND ABOUT 93% BY WEIGHT OF THE TOTAL WEIGHT OF THE MONOMERS.
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) | 1954-07-16 | 1955-01-15 | 1955-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-16 | 1959-01-15 | 1959-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-16 | 1963-01-15 | 1963-07-17 | $7700.00 | Window Closed / Lapsed |