US3206441A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Graft copolymers of styrene-polyalkylene oxide containing polyethylene oxide units used as reversible emulsifiers for vinyl polymerization
Assignee: Bayer AG
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Filing: 1962-09-04
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Granted: 1965-09-14
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Expires: 1982-09-04
Abstract
No abstract record available.
Inventors
- 👤 Bonin Wulf Von
- 👤 Bartl Herbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:33
CPC Classifications
C; C08; C08F; C08F283/00; C08F283/10; C08F2/00; C08F2/12; C08F2/16; C08F2/22; C08F2/24; C08F2/32; C08F283/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
135 words
PROCESS FOR POLYMERIZATION OF A POLYMERIZABLE ORGANIC WATER-INSOLUBLE MONOMER CONTAINING AT LEAST ONE CH2=C< GROUP WHICH COMPRISES FORMING A REVERSED EMULSION COMPRISING SAID MONOMER AS THE DISPERSION MEDIUM AND WATER AS THE DISPERSE PHASE IN THE PRESENCE OF A GRAFT COPOLYMER WHICH HAS BEEN OBTAINED BY GRAFTING A STYRENE HYDROCARBON CONTAINING FROM 8 TO 10 CARBON ATOMS ON TO 10 TO 500 PERCENT BY WEIGHT CALCULATED ON THE AMOUNT OF SAID STYRENE HYDROCARBON, OF A WATER-SOLUBLE POLYALKYLENE-OXIDE CONTAINING POLYETHYLENE OXIDE UNITS AND HAVING A MOLECULAR WEIGHT OF AT LEAST 300, SAID REVERSED EMULSION CONTAINING 5 TO 4,000 PERCENT BY WEIGHT OF WATER, BASED ON THE TOTAL AMOUNT OF MONOMER, AND POLYMERIZING SAID REVERSED EMULSION WITH THE AID OF 0.1 TO 5% BY WEIGHT, CALCULATED ON THE TOTAL MONOMER QUANTITY, OF A FREE RADICAL FORMING SUBSTANCE.
Claim 2
Dependent Claim
135 words
PROCESS FOR POLYMERIZATION OF A POLYMERIZABLE ORGANIC WATER-INSOLUBLE MONOMER CONTAINING AT LEAST ONE CH2=C< GROUP WHICH COMPRISES FORMING A REVERSED EMULSION COMPRISING SAID MONOMER AS THE DISPERSION MEDIUM AND WATER AS THE DISPERSE PHASE IN THE PRESENCE OF A GRAFT COPOLYMER WHICH HAS BEEN OBTAINED BY GRAFTING A STYRENE HYDROCARBON CONTAINING FROM 8 TO 10 CARBON ATOMS ON TO 10 TO 500 PERCENT BY WEIGHT CALCULATED ON THE AMOUNT OF SAID STYRENE HYDROCARBON, OF A WATER-SOLUBLE POLYALKYLENE-OXIDE CONTAINING POLYETHYLENE OXIDE UNITS AND HAVING A MOLECULAR WEIGHT OF AT LEAST 300, SAID REVERSED EMULSION CONTAINING 5 TO 4,000 PERCENT BY WEIGHT OF WATER, BASED ON THE TOTAL AMOUNT OF MONOMER, AND POLYMERIZING SAID REVERSED EMULSION WITH THE AID OF 0.1 TO 5% BY WEIGHT, CALCULATED ON THE TOTAL MONOMER QUANTITY, OF A FREE RADICAL FORMING SUBSTANCE.
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) | 1968-09-13 | 1969-03-15 | 1969-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-13 | 1973-03-15 | 1973-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-13 | 1977-03-15 | 1977-09-14 | $7700.00 | Window Closed / Lapsed |