US2648655A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low-temperature emulsion polymerization of unsaturated organic compounds
Assignee: Hercules Powder Co
•
Filing: 1948-11-24
•
Granted: 1953-08-11
•
Expires: 1968-11-24
Abstract
No abstract record available.
Inventors
- 👤 Edwin J Vandenberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:56
CPC Classifications
C; C08; C08F; C08F4/00; C08F4/28; C08F4/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
116 words
IN THE PROCESS WHICH COMPRISES POLYMERIZING AN ORGANIC COMPOUND CONTAINING THE CH2=CH< GROUP AT A TEMPERATURE BETWEEN ABOUT -5* C. AND -70* C. IN AQUEOUS EMULSION IN THE PRESENCE OF A WATER-SOLUBLE ORGANIC COMPOUND OF LOW FREEZING POINT AS ANTIFREEZE AGENT, AN A,AL-DIALKYLARYLMETHYL HYDROPEROXIDE AS CATALYST, BETWEEN ABOUT 0.5% AND ABOUT 5% OF AN ALKALI METAL SALT OF A DEHYDROGENATED ROSIN ACID AS EMULSIFYING AGENT, AND A METAL ELECTROMOTIVE COUPLE HAVING A STANDARD OXIDATION POTENTIAL BETWEEN ABOUT -1.0 AND ABOUT -0.3 VOLT AS ACTIVATOR, THE IMPROVEMENT WHICH COMPRISES USING AN ALKALI METAL SALT OF A DEHYDROGENATED ROSIN ACID WHICH IS PRODUCED BY SAPONIFYING SAID DEHYDROGENATED ROSIN ACID IN AN AQUEOUS SOLUTION OF THE SAID ANTIFREEZE AGENT.
Claim 2
Dependent Claim
116 words
IN THE PROCESS WHICH COMPRISES POLYMERIZING AN ORGANIC COMPOUND CONTAINING THE CH2=CH< GROUP AT A TEMPERATURE BETWEEN ABOUT -5* C. AND -70* C. IN AQUEOUS EMULSION IN THE PRESENCE OF A WATER-SOLUBLE ORGANIC COMPOUND OF LOW FREEZING POINT AS ANTIFREEZE AGENT, AN A,AL-DIALKYLARYLMETHYL HYDROPEROXIDE AS CATALYST, BETWEEN ABOUT 0.5% AND ABOUT 5% OF AN ALKALI METAL SALT OF A DEHYDROGENATED ROSIN ACID AS EMULSIFYING AGENT, AND A METAL ELECTROMOTIVE COUPLE HAVING A STANDARD OXIDATION POTENTIAL BETWEEN ABOUT -1.0 AND ABOUT -0.3 VOLT AS ACTIVATOR, THE IMPROVEMENT WHICH COMPRISES USING AN ALKALI METAL SALT OF A DEHYDROGENATED ROSIN ACID WHICH IS PRODUCED BY SAPONIFYING SAID DEHYDROGENATED ROSIN ACID IN AN AQUEOUS SOLUTION OF THE SAID ANTIFREEZE AGENT.
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) | 1956-08-10 | 1957-02-09 | 1957-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-10 | 1961-02-09 | 1961-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-10 | 1965-02-09 | 1965-08-11 | $7700.00 | Window Closed / Lapsed |