US2601255A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acrylonitrile polymer solutions in a cyclic carbonate solvent containing a ketone as a discoloration inhibitor
Assignee: Industrial Rayon Corp
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Filing: 1949-08-13
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Granted: 1952-06-24
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Expires: 1969-08-13
Abstract
No abstract record available.
Inventors
- 👤 Herman A Bruson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:47
CPC Classifications
D; D01; D01F; D01F6/00; D01F6/02; D01F6/18; C; C08; C08K; C08K5/00; C08K5/04; C08K5/07; D01F6/28; D01F6/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
A COMPOSITION COMPRISING THE FOLLOWING: A POLYMER OF ACRYLONITRILE CONTAINING IN THE POLYMER MOLECULE AT LEAST 80% BY WEIGHT OF ACRYLONITRILE; AS A SOLVENT THEREFOR A COMPOUND SELECTED FROM THE GROUP CONSISTING OF THE CYCLIC CARBONATES OF 1,2-, 2,3-, AND 1,3-DIHYDRIC ALIPHATIC ALCOHOLS HAVING NO MORE THAN FOUR CARBON ATOMS IN THEIR ALKYLENE RADICAL; AND A RELATIVELY SMALL AMOUNT OF A COLORELESS KETONIC COMPOUND HAVING TWO KETONIC CARBONYL GROUPS, SAID KETONIC COMPOUND HAVING ONLY ONE HYDROGEN-BEARING CARBON ATOM BETWEEN ITS KETONIC GROUPS, AND THE REMAINDER OF SAID KETONIC COMPOUND CONSISTING OF CARBON AND HYDROGEN ATOMS.
Claim 2
Dependent Claim
95 words
A COMPOSITION COMPRISING THE FOLLOWING: A POLYMER OF ACRYLONITRILE CONTAINING IN THE POLYMER MOLECULE AT LEAST 80% BY WEIGHT OF ACRYLONITRILE; AS A SOLVENT THEREFOR A COMPOUND SELECTED FROM THE GROUP CONSISTING OF THE CYCLIC CARBONATES OF 1,2-, 2,3-, AND 1,3-DIHYDRIC ALIPHATIC ALCOHOLS HAVING NO MORE THAN FOUR CARBON ATOMS IN THEIR ALKYLENE RADICAL; AND A RELATIVELY SMALL AMOUNT OF A COLORELESS KETONIC COMPOUND HAVING TWO KETONIC CARBONYL GROUPS, SAID KETONIC COMPOUND HAVING ONLY ONE HYDROGEN-BEARING CARBON ATOM BETWEEN ITS KETONIC GROUPS, AND THE REMAINDER OF SAID KETONIC COMPOUND CONSISTING OF CARBON AND HYDROGEN ATOMS.
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) | 1955-06-24 | 1955-12-24 | 1956-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-06-24 | 1959-12-24 | 1960-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-06-24 | 1963-12-24 | 1964-06-24 | $7700.00 | Window Closed / Lapsed |