US2559947A
Expired / Lapsed
US
⏱️ 0.0 years remaining
1,2-diolefins as modifiers in the alkali-metal-catalyzed polymerization of conjugateddiolefins
Assignee: Phillips Petroleum Co
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Filing: 1947-08-01
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Granted: 1951-07-10
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Expires: 1967-08-01
Abstract
No abstract record available.
Inventors
- 👤 Willie W Crouch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:04
CPC Classifications
C; C08; C08F; C08F236/00; C08F236/02; C08F236/04; C08F236/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
IN THE PRODUCTION OF SYNTHETIC RUBBER BY POLYMERIZATION OF A LIQUID MIXTURE CONTAINING A MONOMERIC MATERIAL COMPRISING A MAJOR AMOUNT OF 1,3-BUTADIENE AND A MINOR AMOUNT OF STYRENE, IN THE PRESENCE OF FINELY DIVIDED SODIUM AS POLYMERIZATION CATALYST, THE IMPROVEMENT WHICH COMPRISES ADDING TO SAID LIQUID MIXTURE A HYDROCARBON DILUENT SELECTED FROM THE GROUP CONSISTING OF PARAFFINS, CYCLOPARAFFINS AND AROMATICS IN AN AMOUNT BETWEEN ABOUT 25 AND ABOUT 200 PARTS AND ALSO ADDING 1,2-BUTADIENE IN AN AMOUNT BETWEEN ABOUT 0.01 AND ABOUT 0.5 PART, EACH BEING PARTS BY WEIGHT PER 100 PARTS OF SAID MONOMERIC MATERIAL, WHEREBY A POLYMERIC PRODUCT IS OBTAINED.
Claim 2
Dependent Claim
102 words
IN THE PRODUCTION OF SYNTHETIC RUBBER BY POLYMERIZATION OF A LIQUID MIXTURE CONTAINING A MONOMERIC MATERIAL COMPRISING A MAJOR AMOUNT OF 1,3-BUTADIENE AND A MINOR AMOUNT OF STYRENE, IN THE PRESENCE OF FINELY DIVIDED SODIUM AS POLYMERIZATION CATALYST, THE IMPROVEMENT WHICH COMPRISES ADDING TO SAID LIQUID MIXTURE A HYDROCARBON DILUENT SELECTED FROM THE GROUP CONSISTING OF PARAFFINS, CYCLOPARAFFINS AND AROMATICS IN AN AMOUNT BETWEEN ABOUT 25 AND ABOUT 200 PARTS AND ALSO ADDING 1,2-BUTADIENE IN AN AMOUNT BETWEEN ABOUT 0.01 AND ABOUT 0.5 PART, EACH BEING PARTS BY WEIGHT PER 100 PARTS OF SAID MONOMERIC MATERIAL, WHEREBY A POLYMERIC PRODUCT IS OBTAINED.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-07-09 | 1955-01-08 | 1955-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-09 | 1959-01-08 | 1959-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-09 | 1963-01-08 | 1963-07-10 | $7700.00 | Window Closed / Lapsed |