US2740766A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acrylonitrile polymers stabilized with certain alkyl sulfones
Assignee: Dow Chemical Co
•
Filing: 1952-09-04
•
Granted: 1956-04-03
•
Expires: 1972-09-04
Abstract
No abstract record available.
Inventors
- 👤 George W Stanton
- 👤 Forrest A Ehlers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:51
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/36; C08K5/41
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
A COMPOSITION OF MATTER THE ESSENTIAL CONSTITUENTS OF WHICH ARE A POLYMERIC BODY CONTAINING AT LEAST 60 PER CENT BY WEIGHT OF ACRYLONITRILE POLYMERIZED IN THE POLYMER MOLECULE, ANY BALANCE BEING ANOTHER MONOETHYLENICALLY UNSATURATED COMPOUND COPOLYMERIZED WITH ACRYLONITRILE, AND, AS A STABILIZING AGENT THEREFOR, FROM 1 TO 20 PER CENT OF AN ALKYL SULFONE IN WHICH THE ALKYL GROUPS ARE LINEAR, DO NOT INDIVIDUALLY CONTAIN OVER 4 CARBON ATOMS, AND THE SUM OF THE CARBON ATOMS IN BOTH ALKYL GROUPS IS FROM 5 TO 8, INCLUSIVE.
Claim 2
Dependent Claim
86 words
A COMPOSITION OF MATTER THE ESSENTIAL CONSTITUENTS OF WHICH ARE A POLYMERIC BODY CONTAINING AT LEAST 60 PER CENT BY WEIGHT OF ACRYLONITRILE POLYMERIZED IN THE POLYMER MOLECULE, ANY BALANCE BEING ANOTHER MONOETHYLENICALLY UNSATURATED COMPOUND COPOLYMERIZED WITH ACRYLONITRILE, AND, AS A STABILIZING AGENT THEREFOR, FROM 1 TO 20 PER CENT OF AN ALKYL SULFONE IN WHICH THE ALKYL GROUPS ARE LINEAR, DO NOT INDIVIDUALLY CONTAIN OVER 4 CARBON ATOMS, AND THE SUM OF THE CARBON ATOMS IN BOTH ALKYL GROUPS IS FROM 5 TO 8, INCLUSIVE.
References Cited (Backward Citations)
US2404717A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-04-03 | 1959-10-03 | 1960-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-04-03 | 1963-10-03 | 1964-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-04-03 | 1967-10-03 | 1968-04-03 | $7700.00 | Window Closed / Lapsed |