US2706185A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solutions of acrylonitrile polymers in solvent mixtures comprising a dihydric phenol and a dicarboxylic acid or anhydride
Assignee: Acordis UK Ltd
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Filing: 1952-02-19
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Granted: 1955-04-12
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Expires: 1972-02-19
Abstract
No abstract record available.
Inventors
- 👤 Kowolik Ernest Jan
- 👤 Downing John
- 👤 Drewitt James Gordon Napier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:19
CPC Classifications
D; D06; D06P; D06P3/00; D06P3/70; D06P3/74; C; C08; C08F; C08F8/00; C08F8/46; C08K; C08K5/00; C08K5/16; C08K5/17
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
COMPOSITIONS COMPRISING AN ACRYLONITRILE POLYMER CONTAINING AT LEAST 85% BY WEIGHT OF ACRYLONITRILE DISSOLVED IN A SOLVENT MIXTURE COMPRISING 5 TO 95% BY WEIGHT OF A DIHYDRIC PHENOL CONTAINING AT MOST SEVEN CARBON ATOMS AND 95 TO 5% BY WEIGHT OF A COMPOUND SELECTED FROM THE GROUP WHICH CONSISTS OF DICARBOXYLIC ACIDS CONTAINING 2 TO 5 CARBON ATOMS IN THE MOLECULE AND CYCLE ANHYDRIDES OF SUCH ACIDS.
Claim 2
Dependent Claim
67 words
COMPOSITIONS COMPRISING AN ACRYLONITRILE POLYMER CONTAINING AT LEAST 85% BY WEIGHT OF ACRYLONITRILE DISSOLVED IN A SOLVENT MIXTURE COMPRISING 5 TO 95% BY WEIGHT OF A DIHYDRIC PHENOL CONTAINING AT MOST SEVEN CARBON ATOMS AND 95 TO 5% BY WEIGHT OF A COMPOUND SELECTED FROM THE GROUP WHICH CONSISTS OF DICARBOXYLIC ACIDS CONTAINING 2 TO 5 CARBON ATOMS IN THE MOLECULE AND CYCLE ANHYDRIDES OF SUCH ACIDS.
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) | 1958-04-11 | 1958-10-11 | 1959-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-04-11 | 1962-10-11 | 1963-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-04-11 | 1966-10-11 | 1967-04-12 | $7700.00 | Window Closed / Lapsed |