US3002956A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization process
Assignee: EIDP Inc
•
Filing: 1958-05-01
•
Granted: 1961-10-03
•
Expires: 1978-05-01
Abstract
No abstract record available.
Inventors
- 👤 Joseph M Perri
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:24
CPC Classifications
C; C08; C08F; C08F220/00; C08F220/02; C08F220/42; C08F220/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
125 words
THE PROCESS WHICH COMPRISES COPOLYMERIZING MIXTURE OF MONOMERS CONTAINING AT LEAST 75% ACRYLONITRILE AND UP TO ABOUT 25% OF VINYLIDENE CHLORIDE AT A TEMPERATURE FROM ABOUT 30*C. TO ABOUT 55*C. IN THE PRESENCE OF WATER, A WATER-SOLUBLE SURFACE-ACTIVE AGENT SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL SALTS OF FATTY ALKYL SULFURIC ACIDS, ALKALI METALS SALTS OF ALKYL ARYL SULFONIC ACIDS, AND POLYOXYETHYLENE SORBITAN MONOOLEATE IN AN AMOUNT FROM ABOUT 0.035% TO ABOUT 0.080% BASED ON THE TOTAL WEIGHT OF ARCYLONITRILE AND VINYLIDENE CHLORIDE, AND AN INITIATOR SYSTEM CONTAINING A PERSULFATE CATALYST AND A SULFOXY REDUCING AGENT, THE AMOUNT OF WATER BEING ADJUSTED TO PROVIDE A CONCENTRATION OF MONOMERS OF FROM ABOUT 13% TO ABOUT 30% BASED ON THE TOTAL WEIGHT OF THE REACTION MIXTURE.
Claim 2
Dependent Claim
125 words
THE PROCESS WHICH COMPRISES COPOLYMERIZING MIXTURE OF MONOMERS CONTAINING AT LEAST 75% ACRYLONITRILE AND UP TO ABOUT 25% OF VINYLIDENE CHLORIDE AT A TEMPERATURE FROM ABOUT 30*C. TO ABOUT 55*C. IN THE PRESENCE OF WATER, A WATER-SOLUBLE SURFACE-ACTIVE AGENT SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL SALTS OF FATTY ALKYL SULFURIC ACIDS, ALKALI METALS SALTS OF ALKYL ARYL SULFONIC ACIDS, AND POLYOXYETHYLENE SORBITAN MONOOLEATE IN AN AMOUNT FROM ABOUT 0.035% TO ABOUT 0.080% BASED ON THE TOTAL WEIGHT OF ARCYLONITRILE AND VINYLIDENE CHLORIDE, AND AN INITIATOR SYSTEM CONTAINING A PERSULFATE CATALYST AND A SULFOXY REDUCING AGENT, THE AMOUNT OF WATER BEING ADJUSTED TO PROVIDE A CONCENTRATION OF MONOMERS OF FROM ABOUT 13% TO ABOUT 30% BASED ON THE TOTAL WEIGHT OF THE REACTION MIXTURE.
References Cited (Backward Citations)
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Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-10-02 | 1965-04-03 | 1965-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-10-02 | 1969-04-03 | 1969-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-10-02 | 1973-04-03 | 1973-10-03 | $7700.00 | Window Closed / Lapsed |