US2638464A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization of vinylidene compounds in the presence of a catalyst composition comprising dimethylhalophenylhydroperoxymethane
Assignee: Phillips Petroleum Co
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Filing: 1949-12-16
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Granted: 1953-05-12
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Expires: 1969-12-16
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
2026-10-27 04:30
CPC Classifications
C; C08; C08F; C08F4/00; C08F4/28; C08F4/32; C08F36/00; C08F36/02; C08F36/04; Y; Y10; Y10S; Y10S526/00; Y10S526/911; Y10S526/915
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
AN IMPROVED PROCESS FOR THE PRODUCTION OF SYNTHETIC RUBBER, WHICH COMPRISES ESTABLISHING AND MAINTAINING AT A POLYMERIZATION TEMPERATURE BETWEEN 10 AND -40* C. AN EMULSION OF AN AQUEOUS PHASE HAVING A PH BETWEEN 9 AND 12, A LIQUID MONOMERIC MATERIAL COMPRISING A MAJOR AMOUNT OF 1,3-BUTADIENE AND A MINOR AMOUNT OF STYRENE, AN ALKALI METAL SOAP EMULSIFYING AGENT, AN ALKYL MERCAPTAN HAVING BETWEEN EIGHT AND SIXTEEN CARBON ATOMS PER MOLECULE, AND A POLYMERIZATION CATALYST COMPOSITION COMPRISING 0.1 TO 10 MILLIMOLS OF DIMETHYL(CHLOROPHENYL) HYDROPEROXYMETHANE TOGETHER WITH 0.1 TO 3 MILLIMOLS OF AN ALKALI METAL FERROUS PYROPHOSPHATE COMPLEX AND A REDUCING SUGAR, SAID PARTS BEING PARTS BY WEIGHT PER 100 PARTS OF SAID MONOMERIC MATERIAL.
Claim 2
Dependent Claim
113 words
AN IMPROVED PROCESS FOR THE PRODUCTION OF SYNTHETIC RUBBER, WHICH COMPRISES ESTABLISHING AND MAINTAINING AT A POLYMERIZATION TEMPERATURE BETWEEN 10 AND -40* C. AN EMULSION OF AN AQUEOUS PHASE HAVING A PH BETWEEN 9 AND 12, A LIQUID MONOMERIC MATERIAL COMPRISING A MAJOR AMOUNT OF 1,3-BUTADIENE AND A MINOR AMOUNT OF STYRENE, AN ALKALI METAL SOAP EMULSIFYING AGENT, AN ALKYL MERCAPTAN HAVING BETWEEN EIGHT AND SIXTEEN CARBON ATOMS PER MOLECULE, AND A POLYMERIZATION CATALYST COMPOSITION COMPRISING 0.1 TO 10 MILLIMOLS OF DIMETHYL(CHLOROPHENYL) HYDROPEROXYMETHANE TOGETHER WITH 0.1 TO 3 MILLIMOLS OF AN ALKALI METAL FERROUS PYROPHOSPHATE COMPLEX AND A REDUCING SUGAR, SAID PARTS BEING PARTS BY WEIGHT PER 100 PARTS OF SAID MONOMERIC MATERIAL.
References Cited (Backward Citations)
US2446797A
Cited
US2534447A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-05-11 | 1956-11-10 | 1957-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-11 | 1960-11-10 | 1961-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-11 | 1964-11-10 | 1965-05-12 | $7700.00 | Window Closed / Lapsed |