Patent US4487474A successfully refreshed from Google Patents.
US2568902A
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Beta thioethyl substituted carbonyl compounds as modifiers in ethylene polymerization
Assignee: Universal Oil Products Co
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Filing: 1948-03-30
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Granted: 1951-09-25
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Expires: 1968-03-30
Abstract
No abstract record available.
Inventors
- 👤 Ralph B Thompson
- 👤 Schmerling Louis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:46
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
128 words
IN THE POLYMERIZATION OF ETHYLENE IN THE PRESENCE OF AN ORGANIC PEROXIDE CATALYST AND A DILUENT SELECTED FROM THE GROUP CONSISTING OF ALCOHOLS, AROMATIC HYDROCARBONS AND SATURATED HYDROCARBONS CONTAINING AT LEAST 3 CARBON ATOMS PER MOLECULE, THE IMPROVEMENT WHICH COMPRISES ADDING TO THE REACTION MIXTURE, IN SUFFICIENT AMOUNT TO INCREASE THE MELTING POINT OF THE ETHYLENE POLYMER, AN ORGANIC COMPOUND CONTAINING A CARBONYL GROUP AND HAVING A THICETHYL GROUP ON THE CARBON ATOM IN BETA POSITION TO THE CARBONYL CARBON ATOM, THE SULFUR ATOM OF SAID THIOETHYL GROUP BEING ATTACHED DIRECTLY TO THE BETA CARBON ATOM, AND SUBJECTING THE MIXTURE TO POLYMERIZATION UNDER A PRESSURE OF FROM ABOUT 15 TO ABOUT 500 ATMOSPHERES AND AT A TEMPERATURE AT LEAST AS HIGH AS THE DECOMPOSITION TEMPERATUER OF SID CATALYST.
Claim 2
Dependent Claim
128 words
IN THE POLYMERIZATION OF ETHYLENE IN THE PRESENCE OF AN ORGANIC PEROXIDE CATALYST AND A DILUENT SELECTED FROM THE GROUP CONSISTING OF ALCOHOLS, AROMATIC HYDROCARBONS AND SATURATED HYDROCARBONS CONTAINING AT LEAST 3 CARBON ATOMS PER MOLECULE, THE IMPROVEMENT WHICH COMPRISES ADDING TO THE REACTION MIXTURE, IN SUFFICIENT AMOUNT TO INCREASE THE MELTING POINT OF THE ETHYLENE POLYMER, AN ORGANIC COMPOUND CONTAINING A CARBONYL GROUP AND HAVING A THICETHYL GROUP ON THE CARBON ATOM IN BETA POSITION TO THE CARBONYL CARBON ATOM, THE SULFUR ATOM OF SAID THIOETHYL GROUP BEING ATTACHED DIRECTLY TO THE BETA CARBON ATOM, AND SUBJECTING THE MIXTURE TO POLYMERIZATION UNDER A PRESSURE OF FROM ABOUT 15 TO ABOUT 500 ATMOSPHERES AND AT A TEMPERATURE AT LEAST AS HIGH AS THE DECOMPOSITION TEMPERATUER OF SID CATALYST.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-09-24 | 1955-03-26 | 1955-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-09-24 | 1959-03-26 | 1959-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-09-24 | 1963-03-26 | 1963-09-25 | $7700.00 | Window Closed / Lapsed |