Patent US3069402A successfully refreshed from Google Patents.
US3069402A
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US
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Polyacrylonitrile and method of preparation
Assignee: Celanese Corp
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Filing: 1957-10-17
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Granted: 1962-12-18
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Expires: 1977-10-17
Abstract
No abstract record available.
Inventors
- 👤 Charles L Smart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:05
CPC Classifications
C; C08; C08F; C08F20/00; C08F20/02; C08F20/42; C08F20/44; C08F2/00; C08F2/36
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
20 words
A PROCESS FOR THE POLYMERIZATION OF ACRYLONITRILE WHICH COMPRISES CONTACTING SAID ACRYLONITRILE AT A POLYMERIZATION TEMPERATURE WITH BORON TRIFLUORIDE.DIETHYL ETHERATE.
Claim 2
Dependent Claim
20 words
A PROCESS FOR THE POLYMERIZATION OF ACRYLONITRILE WHICH COMPRISES CONTACTING SAID ACRYLONITRILE AT A POLYMERIZATION TEMPERATURE WITH BORON TRIFLUORIDE.DIETHYL ETHERATE.
Claim 3
Dependent Claim
53 words
A PROCESS FOR THE POLYMERIZATION OF ACRYLONITRILE WHICH COMPRISES CONTACTING SAID ACRYLONITRILE AT A TEMPERATURE BETWEEN ABOUT 35* AND ABOUT 80*C. WITH BORON TRIFLUORIDE. DIETHYL ETHERATE IN THE PRESENCE OF FROM ABOUT 0.1 TO 2.0 WEIGHT PERCENT OF MOISTURE BASED ON THE WEIGHT OF ACRYLONITRILE AND IN THE PRESENCE OF AN OXYGENCONTAINING ATMOSPHERE.
Claim 4
Dependent Claim
53 words
A PROCESS FOR THE POLYMERIZATION OF ACRYLONITRILE WHICH COMPRISES CONTACTING SAID ACRYLONITRILE AT A TEMPERATURE BETWEEN ABOUT 35* AND ABOUT 80*C. WITH BORON TRIFLUORIDE. DIETHYL ETHERATE IN THE PRESENCE OF FROM ABOUT 0.1 TO 2.0 WEIGHT PERCENT OF MOISTURE BASED ON THE WEIGHT OF ACRYLONITRILE AND IN THE PRESENCE OF AN OXYGENCONTAINING ATMOSPHERE.
References Cited (Backward Citations)
CA473117A
Cited
US2421679A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-12-17 | 1966-06-18 | 1966-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-17 | 1970-06-18 | 1970-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-17 | 1974-06-18 | 1974-12-18 | $7700.00 | Window Closed / Lapsed |