US2648648A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High acrylonitrile polymer solutions
Assignee: Dow Chemical Co
•
Filing: 1951-05-28
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Granted: 1953-08-11
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Expires: 1971-05-28
Abstract
No abstract record available.
Inventors
- 👤 George W Stanton
- 👤 Theodore B Lefferdink
- 👤 Clyde W Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:55
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/02; C08J3/03; D; D01; D01F; D01F6/00; D01F6/02; D01F6/18; C08J2333/00; C08J2333/18; C08J2333/20; Y; Y10; Y10S; Y10S526/00; Y10S526/914
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
A COMPOSITION OF MATTER, THE ESSENTIAL CONSTITUENTS OF WHICH ARE A POLYMER OF ACRYLONITRILE CONTAINING AT LEAST 85 PER CENT BY WEIGHT OF ACRYLONITRILE IN THE POLYMER MOLECULE AND FROM 5 TO 30 PER CENT OF ITS WEIGHT OF AN ORGANIC PEPTIZING AGENT THEREFOR, IN AN AQUEOUS SALINE SOLUTION CAPABLE OF DISSOLVING POLYACRYLONITRILE THE PRINCIPAL SALINE CONSTITUENT IN SAID SOLUTION BEING ONE WHOSE ANION IS AT LEAST AS HIGH AS ITS CATION IN THE APPENDED LYOTROPIC SERIES OF SOLVENTS FOR THE POLYMER:
Claim 2
Dependent Claim
82 words
A COMPOSITION OF MATTER, THE ESSENTIAL CONSTITUENTS OF WHICH ARE A POLYMER OF ACRYLONITRILE CONTAINING AT LEAST 85 PER CENT BY WEIGHT OF ACRYLONITRILE IN THE POLYMER MOLECULE AND FROM 5 TO 30 PER CENT OF ITS WEIGHT OF AN ORGANIC PEPTIZING AGENT THEREFOR, IN AN AQUEOUS SALINE SOLUTION CAPABLE OF DISSOLVING POLYACRYLONITRILE THE PRINCIPAL SALINE CONSTITUENT IN SAID SOLUTION BEING ONE WHOSE ANION IS AT LEAST AS HIGH AS ITS CATION IN THE APPENDED LYOTROPIC SERIES OF SOLVENTS FOR THE POLYMER:
References Cited (Backward Citations)
US2425191A
Cited
US2528710A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-10 | 1957-02-09 | 1957-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-10 | 1961-02-09 | 1961-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-10 | 1965-02-09 | 1965-08-11 | $7700.00 | Window Closed / Lapsed |