US2643995A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Emulsion polymerization process
Assignee: Monsanto Chemicals Ltd
•
Filing: 1949-03-25
•
Granted: 1953-06-30
•
Expires: 1969-03-25
Abstract
No abstract record available.
Inventors
- 👤 Harold F Park
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:33
CPC Classifications
C; C08; C08F; C08F2/00; C08F2/12; C08F2/16; Y; Y10; Y10S; Y10S526/00; Y10S526/911
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
A PROCESS WHICH COMPRISES POLYMERIZING 100 PARTS OF A POLYMERIZABLE VINYL AROMATIC COMPOUND IN AQUEOUS EMULSION USING FROM 0.05 TO 0.5 PART OF AN EMULSIFYING AGENT TAKEN FROM THE GROUP CONSISTING OF THE ALKALI METAL AND ALKALINE EARTH METAL SALTS OF SUBSTITUTED ARYL SULFONIC ACIDS IN WHICH THE SUBSTITUENT IS AN ALIPHATIC GROUP CONTAINING FROM 12 TO 22 CARBON ATOMS, AT LEAST 0.5 PART OF AN UNSUBSTITUTED, SATURATED ALIPAHTIC MONOHYDRIC ALCOHOL CONTAINING FROM 1 TO 20 CARBON ATOMS AND FROM 0.05 TO 0.8 PART OF HYDROGEN PEROXIDE, SAID PROCESS BEING CARRIED OUT AT TEMPERATURES FROM REFLUX TEMPERATURE AT ATMOSPHERIC PRESSURE TO 30* C. BELOW SAID REFLUX TEMPERATURE.
Claim 2
Dependent Claim
107 words
A PROCESS WHICH COMPRISES POLYMERIZING 100 PARTS OF A POLYMERIZABLE VINYL AROMATIC COMPOUND IN AQUEOUS EMULSION USING FROM 0.05 TO 0.5 PART OF AN EMULSIFYING AGENT TAKEN FROM THE GROUP CONSISTING OF THE ALKALI METAL AND ALKALINE EARTH METAL SALTS OF SUBSTITUTED ARYL SULFONIC ACIDS IN WHICH THE SUBSTITUENT IS AN ALIPHATIC GROUP CONTAINING FROM 12 TO 22 CARBON ATOMS, AT LEAST 0.5 PART OF AN UNSUBSTITUTED, SATURATED ALIPAHTIC MONOHYDRIC ALCOHOL CONTAINING FROM 1 TO 20 CARBON ATOMS AND FROM 0.05 TO 0.8 PART OF HYDROGEN PEROXIDE, SAID PROCESS BEING CARRIED OUT AT TEMPERATURES FROM REFLUX TEMPERATURE AT ATMOSPHERIC PRESSURE TO 30* C. BELOW SAID REFLUX TEMPERATURE.
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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) | 1956-06-29 | 1956-12-29 | 1957-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-29 | 1960-12-29 | 1961-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-29 | 1964-12-29 | 1965-06-30 | $7700.00 | Window Closed / Lapsed |