Patent US2569448A successfully refreshed from Google Patents.
US2569448A
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Dehydroabietic acid salts as emulsifiers in aqueous diolefin polymerization
Assignee: Hercules Powder Co
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Filing: 1945-07-07
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Granted: 1951-10-02
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Expires: 1965-07-07
Abstract
No abstract record available.
Inventors
- 👤 Joseph N Borglin
- 👤 Philip A Ray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:19
CPC Classifications
C; C08; C08F; C08F36/00; C08F36/02; C08F36/04
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
37 words
THE PROCESS WHICH COMPRISES COPOLYMERIZING ISOPERENE AND A MONOLEFINIC COMPOUND POLYMERIZABLE WITH A PEROXIDE CATALYST AND CONTAINING THE CH2=C< GROUP IN AQUEOUS EMULSTION IN THE PRESENCE OF AN ALKALI METAL SALT OF DEHYDROABIETIC ACID AS EMULSIFYING AGENT.
References Cited (Backward Citations)
US2154629A
Cited
US2264173A
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US2201237A
Cited
US2295030A
Cited
US2376382A
Cited
US2388477A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-10-01 | 1955-04-02 | 1955-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-10-01 | 1959-04-02 | 1959-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-10-01 | 1963-04-02 | 1963-10-02 | $7700.00 | Window Closed / Lapsed |