Patent US2228971A successfully refreshed from Google Patents.
Patent US2665272A successfully refreshed from Google Patents.
US2665272A
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Emulsion polymerization at low temperatures in the presence of certain trialkylhydroperoxy methanes
Assignee: Phillips Petroleum Co
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Filing: 1949-08-15
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Granted: 1954-01-05
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Expires: 1969-08-15
Abstract
No abstract record available.
Inventors
- 👤 William B Reynolds
- 👤 John E Wicklatz
- 👤 Thomas J Kennedy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 02:48
CPC Classifications
C; C08; C08F; C08F36/00; C08F36/02; C08F36/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
IN A PROCESS FOR PRODUCING A SOLID POLYMERIC PRODUCT BY POLYMERIZING A CONJUGATED DIOLEFIN IN AQUEOUS EMULSION WITH AN ALKYL MERCAPTAN HAVING FROM 8 TO 16 CARBON ATOMS AS A MODIFIER AND IN THE PRESENCE OF AN ORGANIC HYDROPEROXIDE AS AN OXIDIZING CONSTITUENT OF A POLYMERIZATION CATALYST COMPOSITION WHICH ALSO COMPRISES A REDUCTANT, THE IMPROVEMENT WHICH COMPRISES EFFECTING SAID POLYMERIZATION AT A REACTION TEMPERATURE BELOW 10* C. USING 2,2,5-TRIMETHYL-5HYDROPEROXYHEXANE AS SAID ORGANIC HYDROPEROXIDE.
Claim 2
Dependent Claim
73 words
IN A PROCESS FOR PRODUCING A SOLID POLYMERIC PRODUCT BY POLYMERIZING A CONJUGATED DIOLEFIN IN AQUEOUS EMULSION WITH AN ALKYL MERCAPTAN HAVING FROM 8 TO 16 CARBON ATOMS AS A MODIFIER AND IN THE PRESENCE OF AN ORGANIC HYDROPEROXIDE AS AN OXIDIZING CONSTITUENT OF A POLYMERIZATION CATALYST COMPOSITION WHICH ALSO COMPRISES A REDUCTANT, THE IMPROVEMENT WHICH COMPRISES EFFECTING SAID POLYMERIZATION AT A REACTION TEMPERATURE BELOW 10* C. USING 2,2,5-TRIMETHYL-5HYDROPEROXYHEXANE AS SAID ORGANIC HYDROPEROXIDE.
References Cited (Backward Citations)
US2427847A
Cited
US2367805A
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US2395523A
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US2535557A
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US2609362A
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US2588975A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-01-04 | 1957-07-06 | 1958-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-01-04 | 1961-07-06 | 1962-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-01-04 | 1965-07-06 | 1966-01-05 | $7700.00 | Window Closed / Lapsed |