US2609362A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Emulsion polymerization in systems containing an organic hydroperoxide
Assignee: Phillips Petroleum Co
•
Filing: 1948-10-04
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Granted: 1952-09-02
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Expires: 1968-10-04
Abstract
No abstract record available.
Inventors
- 👤 Charles F Fryling
- 👤 Carl A Uraneck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:15
CPC Classifications
C; C08; C08F; C08F36/00; C08F36/02; C08F36/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
117 words
IN THE PRODUCTION OF SYNTHETIC RUBBER BY COPOLYMERIZATION IN AQUEOUS EMULSION OF A MONOMERIC MATERIAL COMPRISING 1,3-BUTADIENE AND STYRENE IN A WEIGHT RATIO OF AT LEAST 65:35, THE IMPROVEMENT WHICH COMPRISES EFFECTING SAID POLYMERIZATION AT A TEMPERATURE BETWEEN 0 AND -40* C. IN THE PRESENCE OF AN AQUEOUS MEDIUM AND IN THE PRESENCE OF FERROUS SULFATE AND SODIUM PYROPHOSPHATE AND PHENYL (DIMETHYL) HYDROPEROXYMETHANE, AND IN THE ABSENCE OF AN ORGANIC REDUCTANT, WITH A MOL RATIO OF SAID COMPOUNDS OF 1:1:1-1.1 AND WITH THE AMOUNT OF EACH BETWEEN 0.1 AND 2.5 MILLIMOLS PER 100 PARTS BY WEIGHT OF SAID MONOMERIC MATERIAL, AND WITH AN ALKALINE EMULSIFYING AGENT AND THE PH OF SAID AQUEOUS MEDIUM BETWEEN 9 AND 11.8.
Claim 2
Dependent Claim
117 words
IN THE PRODUCTION OF SYNTHETIC RUBBER BY COPOLYMERIZATION IN AQUEOUS EMULSION OF A MONOMERIC MATERIAL COMPRISING 1,3-BUTADIENE AND STYRENE IN A WEIGHT RATIO OF AT LEAST 65:35, THE IMPROVEMENT WHICH COMPRISES EFFECTING SAID POLYMERIZATION AT A TEMPERATURE BETWEEN 0 AND -40* C. IN THE PRESENCE OF AN AQUEOUS MEDIUM AND IN THE PRESENCE OF FERROUS SULFATE AND SODIUM PYROPHOSPHATE AND PHENYL (DIMETHYL) HYDROPEROXYMETHANE, AND IN THE ABSENCE OF AN ORGANIC REDUCTANT, WITH A MOL RATIO OF SAID COMPOUNDS OF 1:1:1-1.1 AND WITH THE AMOUNT OF EACH BETWEEN 0.1 AND 2.5 MILLIMOLS PER 100 PARTS BY WEIGHT OF SAID MONOMERIC MATERIAL, AND WITH AN ALKALINE EMULSIFYING AGENT AND THE PH OF SAID AQUEOUS MEDIUM BETWEEN 9 AND 11.8.
References Cited (Backward Citations)
US2569480A
Cited
US2546220A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-09-02 | 1956-03-03 | 1956-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-09-02 | 1960-03-03 | 1960-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-09-02 | 1964-03-03 | 1964-09-02 | $7700.00 | Window Closed / Lapsed |