US3284393A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water-in-oil emulsion polymerization process for polymerizing watersoluble monomers
Assignee: Dow Chemical Co
•
Filing: 1959-11-04
•
Granted: 1966-11-08
•
Expires: 1979-11-04
Abstract
No abstract record available.
Inventors
- 👤 John W Vanderhoff
- 👤 Ralph M Wiley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:54
CPC Classifications
C; C08; C08F; C08F2/00; C08F2/32; Y; Y10; Y10S; Y10S526/00; Y10S526/911
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
A WATER-IN-OIL EMULSION POLYMERIZATION METHOD FOR MAKING LATEX POLYMERS AND COPOLYMERS OF WATER-SOLUBLE ETHYLENIC UNSATURATED MONOMERS WHICH METHOD COMPRISES FORMING A WATER-IN-OIL EMULSION OF THE GROUP CONSISTING OF A WATER-SOLUBLE ETHYLENIC UNSATURATED MONOMER HAVING A WATER SOLUBILITY OF AT LEAST 5 WEIGHT PERCENT AND AQUEOUS SOLUTIONS THEREOF, IN AN INERT HYDROPHOBIC LIQUID ORGANIC DISPERSION MEDIUM CONTAINING BETWEEN 0.1 AND 10 PERCENT BY WEIGHT OF A WATER-IN-OIL EMULSIFYING AGENT, WHEREIN THE PROPORTION OF MONOMER PHASE RANGES BETWEEN 30 AND 70 PERCENT OF THE EMULSION, HEATING THE EMULSION UNDER FREE RADICAL FORMING CONDITIONS TO POLYMERIZE MONOMER IN A DISPERSE PHASE IN SAID DISPERSION MEDIUM AND RECOVERING THE POLYMERIZED LATEX PRODUCT.
Claim 2
Dependent Claim
108 words
A WATER-IN-OIL EMULSION POLYMERIZATION METHOD FOR MAKING LATEX POLYMERS AND COPOLYMERS OF WATER-SOLUBLE ETHYLENIC UNSATURATED MONOMERS WHICH METHOD COMPRISES FORMING A WATER-IN-OIL EMULSION OF THE GROUP CONSISTING OF A WATER-SOLUBLE ETHYLENIC UNSATURATED MONOMER HAVING A WATER SOLUBILITY OF AT LEAST 5 WEIGHT PERCENT AND AQUEOUS SOLUTIONS THEREOF, IN AN INERT HYDROPHOBIC LIQUID ORGANIC DISPERSION MEDIUM CONTAINING BETWEEN 0.1 AND 10 PERCENT BY WEIGHT OF A WATER-IN-OIL EMULSIFYING AGENT, WHEREIN THE PROPORTION OF MONOMER PHASE RANGES BETWEEN 30 AND 70 PERCENT OF THE EMULSION, HEATING THE EMULSION UNDER FREE RADICAL FORMING CONDITIONS TO POLYMERIZE MONOMER IN A DISPERSE PHASE IN SAID DISPERSION MEDIUM AND RECOVERING THE POLYMERIZED LATEX PRODUCT.
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) | 1969-11-07 | 1970-05-09 | 1970-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-07 | 1974-05-09 | 1974-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-07 | 1978-05-09 | 1978-11-08 | $7700.00 | Window Closed / Lapsed |