US2648649A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acrylonitrile polymers plasticized with aqueous inroganic salt solutions
Assignee: Dow Chemical Co
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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
- 👤 Thomas C Spence
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:59
CPC Classifications
D; D01; D01F; D01F6/00; D01F6/02; D01F6/18; C; C08; C08K; C08K3/00; C08K3/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
137 words
A COMPOSITION OF MATTER CONSISTING ESSENTIALLY OF (1) A POLYMER OF AT LEAST 85 PER CENT ACRYLONITRILE, ANY BALANCE BEING A COPOLYMERIZED MONOETHYLENICALLY UNSATURATED COMPOUND, (2) FROM ABOUT 6 TO 20 PER CENT, BASED ON THE WEIGHT OF POLYMER, OF A HUMECTANT SELECTED FROM THE GROUP CONSISTING OF (A) AN INORGANIC, HYGROSCOPIC WATER-SOLUBLE METAL SALT WHOSE ANION IS AT LEAST AS HIGH AS ITS CATION IN THE APPENDED LYOTROPIC SERIES OF SOLVENTS FOR THE POLYMER, AND (B) WATERSOLUBLE MIXTURES OF FROM 30 TO 50 PARTS OF SUCH SALT WITH FROM 5 TO 25 PARTS OF A SALT WHOSE ANION IS LOWER IN SAID SERIES THAN ITS CATION, IN PROPORTIONS TO MAKE AT LEAST 55 PARTS BY WEIGHT, AND (3) AN AMOUNT OF WATER FROM 0.5 TO 2 TIMES THE WEIGHT OF SAID SALT, SAID LYOTROPIC SERIES BEING:
Claim 2
Dependent Claim
137 words
A COMPOSITION OF MATTER CONSISTING ESSENTIALLY OF (1) A POLYMER OF AT LEAST 85 PER CENT ACRYLONITRILE, ANY BALANCE BEING A COPOLYMERIZED MONOETHYLENICALLY UNSATURATED COMPOUND, (2) FROM ABOUT 6 TO 20 PER CENT, BASED ON THE WEIGHT OF POLYMER, OF A HUMECTANT SELECTED FROM THE GROUP CONSISTING OF (A) AN INORGANIC, HYGROSCOPIC WATER-SOLUBLE METAL SALT WHOSE ANION IS AT LEAST AS HIGH AS ITS CATION IN THE APPENDED LYOTROPIC SERIES OF SOLVENTS FOR THE POLYMER, AND (B) WATERSOLUBLE MIXTURES OF FROM 30 TO 50 PARTS OF SUCH SALT WITH FROM 5 TO 25 PARTS OF A SALT WHOSE ANION IS LOWER IN SAID SERIES THAN ITS CATION, IN PROPORTIONS TO MAKE AT LEAST 55 PARTS BY WEIGHT, AND (3) AN AMOUNT OF WATER FROM 0.5 TO 2 TIMES THE WEIGHT OF SAID SALT, SAID LYOTROPIC SERIES BEING:
References Cited (Backward Citations)
US2140921A
Cited
US2425192A
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 |