Patent US3060157A successfully refreshed from Google Patents.
US3060157A
Expired / Lapsed
US
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Acrylonitrile polymerization
Assignee: EIDP Inc
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Filing: 1957-11-04
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Granted: 1962-10-23
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Expires: 1977-11-04
Abstract
No abstract record available.
Inventors
- 👤 Goodman Albert
- 👤 Jr Lester David Grandine
- 👤 Vosburgh William George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:18
CPC Classifications
C; C08; C08F; C08F20/00; C08F20/02; C08F20/42; C08F20/44; C08F2/00; C08F2/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
IN A PROCESS FOR PREPARING A POLYMER OF ACRYLONITRILE WHICH COMPRISES CONTINUOUSLY POLYMERIZING IN THE PRESENCE OF A POLMERIZATION CATALYST A MONOMERIC MATERIAL COMPRISING 94% ACRYLONITRILE AND 6% METHYL ACRYLATE AT A TEMPERATURE BETWEEN ABOUT 35*C, AND ABOUT 80*C. UNDER A SUBSTANTIALLY CONSTANT ENVIRONMENT IN WHICH THE COMPONENTS COMPRISING THE REACTION MEDIUM ARE PRESENT IN AMOUNTS CORRESPONDING TO A FEED OF ABOUT 1.96% WATER, ABOUT 39.2% DIMETHYLFORMAMIDE, AND ABOUT 58.8% OF SAID MONOMERIC MATERIAL, SAID AMOUNTS BEING SELECTED TO PROVIDE A TOTAL OF 100% OF SAID COMPONENTS IN SAID FEED.
Claim 2
Dependent Claim
90 words
IN A PROCESS FOR PREPARING A POLYMER OF ACRYLONITRILE WHICH COMPRISES CONTINUOUSLY POLYMERIZING IN THE PRESENCE OF A POLMERIZATION CATALYST A MONOMERIC MATERIAL COMPRISING 94% ACRYLONITRILE AND 6% METHYL ACRYLATE AT A TEMPERATURE BETWEEN ABOUT 35*C, AND ABOUT 80*C. UNDER A SUBSTANTIALLY CONSTANT ENVIRONMENT IN WHICH THE COMPONENTS COMPRISING THE REACTION MEDIUM ARE PRESENT IN AMOUNTS CORRESPONDING TO A FEED OF ABOUT 1.96% WATER, ABOUT 39.2% DIMETHYLFORMAMIDE, AND ABOUT 58.8% OF SAID MONOMERIC MATERIAL, SAID AMOUNTS BEING SELECTED TO PROVIDE A TOTAL OF 100% OF SAID COMPONENTS IN SAID FEED.
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) | 1965-10-22 | 1966-04-23 | 1966-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-10-22 | 1970-04-23 | 1970-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-10-22 | 1974-04-23 | 1974-10-23 | $7700.00 | Window Closed / Lapsed |