US2851434A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of making acrylonitrile polymer solutions
Assignee: Imperial Chemical Industries Ltd
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Filing: 1955-05-12
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Granted: 1958-09-09
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Expires: 1975-05-12
Abstract
No abstract record available.
Inventors
- 👤 Jones Evan Islwyn
- 👤 Wood Leonard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:43
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/09; C08K5/10; C08K5/109
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
IN A PROCESS FOR THE PREPARATION OF COMPOSITIONS COMPRISING (A) ACRYLONITRILE POLYMERS SELECTED FROM THE GROUP CONSISTING OF POLYACRYLONITRILE, COPOLYMERS OF ACRYLONITRILES AND OTHER VINYL COMPOUNDS CONTAINING A MAJOR PROPORTION OF ACRYLONITRILE IN THE POLYMER MOLECULE AND GRAFTED POLYMERS OF CARYLONITRILE, AND (B) ETHYLENE CARBONATE AND (C) WATER CONTAINING MORE THAN 60% BY WEIGHT OF ETHYLENE CARBONATE THE IMPROVEMENT WHICH COMPRISES MIXING ONE OF THE ORGANIC COMPONENTS (A) AND (B) OF THE COMPOSITION WITH WATER AT A TEMPERATURE IN THE RANGE OF -2*C. TO 20*C. AND THE SOLID MIXTURE THUS RESULTING IS MIXED WITH THE OTHER OF SAID ORGANIC COMPONENTS WHILE STILL MAINTAINING THE TEMPERATURE WITHIN SAID RANGE.
Claim 2
Dependent Claim
108 words
IN A PROCESS FOR THE PREPARATION OF COMPOSITIONS COMPRISING (A) ACRYLONITRILE POLYMERS SELECTED FROM THE GROUP CONSISTING OF POLYACRYLONITRILE, COPOLYMERS OF ACRYLONITRILES AND OTHER VINYL COMPOUNDS CONTAINING A MAJOR PROPORTION OF ACRYLONITRILE IN THE POLYMER MOLECULE AND GRAFTED POLYMERS OF CARYLONITRILE, AND (B) ETHYLENE CARBONATE AND (C) WATER CONTAINING MORE THAN 60% BY WEIGHT OF ETHYLENE CARBONATE THE IMPROVEMENT WHICH COMPRISES MIXING ONE OF THE ORGANIC COMPONENTS (A) AND (B) OF THE COMPOSITION WITH WATER AT A TEMPERATURE IN THE RANGE OF -2*C. TO 20*C. AND THE SOLID MIXTURE THUS RESULTING IS MIXED WITH THE OTHER OF SAID ORGANIC COMPONENTS WHILE STILL MAINTAINING THE TEMPERATURE WITHIN SAID RANGE.
References Cited (Backward Citations)
US2734041A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-08 | 1962-03-10 | 1962-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-08 | 1966-03-10 | 1966-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-08 | 1970-03-10 | 1970-09-09 | $7700.00 | Window Closed / Lapsed |