Patent US3054782A successfully refreshed from Google Patents.
US3054782A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acrylonitrile polymers prepared in granular form
Assignee: Wyeth Holdings LLC
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Filing: 1958-06-16
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Granted: 1962-09-18
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Expires: 1978-06-16
Abstract
No abstract record available.
Inventors
- 👤 Saxon Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:13
CPC Classifications
C; C08; C08F; C08F20/00; C08F20/02; C08F20/42; C08F20/44; C08F2/00; C08F2/12; C08F2/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
A METHOD OF MAKING AN INSOLUBLE, DISCRETE, GRANULAR, POLYMERIC PRODUCT WHICH COMPRISES POLYMERIZING AT LEAST 60%, BY WEIGHT, OF MONOMERIC ACRYLONITRILE, NOT MORE THAN 40%, BY WEIGHT, OF A SUBSTANTIALLY WATERINSOLUBLE MONOMER CONTAINING AN UNSATURATED POLYMERIZABLE CH2=C< GROUP AND AT LEAST 3%, BY WEIGHT OF THE TOTAL MONOMERS, OF A POLYMERIZABLE CROSS-LINKING AGENT CONTAINING AT LEAST TWO ETHYLENICALLY UNSATURATED NON-CONJUGATED LINKAGES, AT A TEMPERATURE OF FROM ABOUT 30* C. TO REFLUX, IN A LIQUID TWO-PHASE AQUEOUS MEDIUM, CONTAINING AN AMOUNT OF WATER INSUFFICIENT TO SUBSTANTIALLY SOLUBILIZE THE MONOMERS, AND IN THE PRESENCE OF FORM ABOUT 0.5% TO ABOUT 10%, BASED ON THE TOTAL FORM ABOUT 0.5% TO ABOUT 10%, BASED ON THE TOTAL CATALYST SELECTED FROM THE GROUP CONSISTING OF (1) ALIPHATIC AZO COMPOUNDS HAVING THE FORMULA
Claim 2
Independent Claim
127 words
A METHOD OF MAKING AN INSOLUBLE, DISCRETE, GRANULAR, POLYMERIC PRODUCT WHICH COMPRISES POLYMERIZING AT LEAST 60%, BY WEIGHT, OF MONOMERIC ACRYLONITRILE, NOT MORE THAN 40%, BY WEIGHT, OF A SUBSTANTIALLY WATERINSOLUBLE MONOMER CONTAINING AN UNSATURATED POLYMERIZABLE CH2=C< GROUP AND AT LEAST 3%, BY WEIGHT OF THE TOTAL MONOMERS, OF A POLYMERIZABLE CROSS-LINKING AGENT CONTAINING AT LEAST TWO ETHYLENICALLY UNSATURATED NON-CONJUGATED LINKAGES, AT A TEMPERATURE OF FROM ABOUT 30* C. TO REFLUX, IN A LIQUID TWO-PHASE AQUEOUS MEDIUM, CONTAINING AN AMOUNT OF WATER INSUFFICIENT TO SUBSTANTIALLY SOLUBILIZE THE MONOMERS, AND IN THE PRESENCE OF FORM ABOUT 0.5% TO ABOUT 10%, BASED ON THE TOTAL FORM ABOUT 0.5% TO ABOUT 10%, BASED ON THE TOTAL CATALYST SELECTED FROM THE GROUP CONSISTING OF (1) ALIPHATIC AZO COMPOUNDS HAVING THE FORMULA
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) | 1965-09-17 | 1966-03-19 | 1966-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-09-17 | 1970-03-19 | 1970-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-09-17 | 1974-03-19 | 1974-09-18 | $7700.00 | Window Closed / Lapsed |