US2574020A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shortstopping an emulsion polymerization reaction with alkyl polysulfide
Assignee: Phillips Petroleum Co
•
Filing: 1946-06-17
•
Granted: 1951-11-06
•
Expires: 1966-06-17
Abstract
No abstract record available.
Inventors
- 👤 Willie W Crouch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:27
CPC Classifications
C; C08; C08F; C08F36/00; C08F36/02; C08F36/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
IN THE EMULSION POLYMERIZATION OF BUTADIENE AND AN UNSATURATED ORGANIC MONOMER COPOLYMERIZABLE THEREWITH IN AQUEOUS EMULSION IN THE PRESENCE OF AN OXIDATION TYPE CATALYST, THE IMPROVEMENT WHICH COMPRISES CARRYING THE POLYMERIZATION TO THE DESIRED EXTENT, AND THEN ARRESTING POLYMERIZATION BY THE ADDITION TO THE POLYMERIZING MIXTURE OF AN ALKYL POLYSULFIDE CONTAINING 3 TO 5 SULFUR ATOMS PER MOLECULE AND FROM 2 TO 16 CARBON ATOMS IN EACH ALKYL GROUP IN AN AMOUNT EQUIVALENT TO FROM ABOUT 0.1 TO ABOUT 0.5 WEIGHT PER CENT OF THE REACTANTS.
Claim 2
Dependent Claim
86 words
IN THE EMULSION POLYMERIZATION OF BUTADIENE AND AN UNSATURATED ORGANIC MONOMER COPOLYMERIZABLE THEREWITH IN AQUEOUS EMULSION IN THE PRESENCE OF AN OXIDATION TYPE CATALYST, THE IMPROVEMENT WHICH COMPRISES CARRYING THE POLYMERIZATION TO THE DESIRED EXTENT, AND THEN ARRESTING POLYMERIZATION BY THE ADDITION TO THE POLYMERIZING MIXTURE OF AN ALKYL POLYSULFIDE CONTAINING 3 TO 5 SULFUR ATOMS PER MOLECULE AND FROM 2 TO 16 CARBON ATOMS IN EACH ALKYL GROUP IN AN AMOUNT EQUIVALENT TO FROM ABOUT 0.1 TO ABOUT 0.5 WEIGHT PER CENT OF THE REACTANTS.
References Cited (Backward Citations)
US2366313A
Cited
US2388477A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-11-05 | 1955-05-07 | 1955-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-11-05 | 1959-05-07 | 1959-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-11-05 | 1963-05-07 | 1963-11-06 | $7700.00 | Window Closed / Lapsed |