US2579908A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aqueous emulsion polymerization with low initial soap concentration
Assignee: Uniroyal Inc
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Filing: 1946-04-12
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Granted: 1951-12-25
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Expires: 1966-04-12
Abstract
No abstract record available.
Inventors
- 👤 John A Davison
- 👤 Walter R Dunn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:24
CPC Classifications
C; C08; C08F; C08F2/00; C08F2/12; C08F2/16; C08F2/22; C08F2/24; C08F2/26; C08F36/00; C08F36/02; C08F36/04; Y; Y10; Y10S; Y10S260/00; Y10S260/22; Y10S526/00; Y10S526/909
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
95 words
IN THE AQUEOUS POLYMERIZATION OF A BUTADIENE-1,3 HYDROCARBON WITH SOAP AS THE EMULSIFYING AGENT, THE STEPS OF INITIALLY CARRYING OUT THE POLYMERIZATION IN THE PRESENCE OF 0.5 TO LESS THAN 1.5 PARTS OF AN ALKALI SOAP OF A SOAP FORMING CARBOXYLIC ACID HAVING 10 TO 20 CARBON ATOMS IN THE MOECULAR PER 100 PARTS OF POLYMERIZABLE MONOMERS UNTIL A CONVERSION TO POLYMERIC MATERIAL OF ABOUT 50% HAS TAKEN PLACE, THEREAFTER INCREASING THE SOAP CONTENT TO AN AMOUNT SUFFICIENT TO MAINTAIN THE STABILITY OF THE EMULSION, AND CONTINUING THE POLYMERIZATION TO ABOUT 70 TO 100% CONVERSION.
References Cited (Backward Citations)
US2333403A
Cited
US2434536A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-12-24 | 1955-06-25 | 1955-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-24 | 1959-06-25 | 1959-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-24 | 1963-06-25 | 1963-12-25 | $7700.00 | Window Closed / Lapsed |