US2947735A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of copolymers of ethylene
Assignee: Bayer AG
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Filing: 1957-12-19
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Granted: 1960-08-02
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Expires: 1977-12-19
Abstract
No abstract record available.
Inventors
- 👤 Bartl Herbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:21
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
135 words
A PROCESS FOR THE PRODUCTION OF A NOVEL COPOLYMER WHICH COMPRISES COPOLYMERIZING ETHYLENE AND AT LEAST ONE VINYL ESTER SELECTED FROM THE GROUP CONSISTING OF VINYL ACETATE AND VINYL PROPIONATE, IN A HOMOGENEOUS LIQUID PHASE CONSISTING ESSENTIALLY OF TERTIARY BUTYL ALCOHOL AND SAID VINYL ESTER, AT TEMPERATURES BETWEEN 10* AND 200* C. AND AT A PRESSURE OF AT LEAST 10 ATM. IN THE PRESENCE OF AN ORGANIC FREE RADICAL-FORMING POLYMERIZATION CATALYST AND IN THE ABSENCE OF AN EMULSIFYING AGENT, SAID TERTIARY BUTYL ALCOHOL BEING PRESENT IN AN AMOUNT BY WEIGHT VARYING 10 TIMES TO THAT OF VINYL ESTER, THE ETHYLENE AND SAID VINYL ESTER BEING USED IN A PROPORTION BY WEIGHT VARYING BETWEEN 2:1 AND 20:1, TO PRODUCE COPOLYMERS IN WHICH THE VINYL ESTER IS PRESENT IN AN AMOUNT NOT SURPASSING 35 PERCENT BY WEIGHT.
Claim 2
Dependent Claim
135 words
A PROCESS FOR THE PRODUCTION OF A NOVEL COPOLYMER WHICH COMPRISES COPOLYMERIZING ETHYLENE AND AT LEAST ONE VINYL ESTER SELECTED FROM THE GROUP CONSISTING OF VINYL ACETATE AND VINYL PROPIONATE, IN A HOMOGENEOUS LIQUID PHASE CONSISTING ESSENTIALLY OF TERTIARY BUTYL ALCOHOL AND SAID VINYL ESTER, AT TEMPERATURES BETWEEN 10* AND 200* C. AND AT A PRESSURE OF AT LEAST 10 ATM. IN THE PRESENCE OF AN ORGANIC FREE RADICAL-FORMING POLYMERIZATION CATALYST AND IN THE ABSENCE OF AN EMULSIFYING AGENT, SAID TERTIARY BUTYL ALCOHOL BEING PRESENT IN AN AMOUNT BY WEIGHT VARYING 10 TIMES TO THAT OF VINYL ESTER, THE ETHYLENE AND SAID VINYL ESTER BEING USED IN A PROPORTION BY WEIGHT VARYING BETWEEN 2:1 AND 20:1, TO PRODUCE COPOLYMERS IN WHICH THE VINYL ESTER IS PRESENT IN AN AMOUNT NOT SURPASSING 35 PERCENT BY WEIGHT.
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) | 1963-08-02 | 1964-02-01 | 1964-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-02 | 1968-02-01 | 1968-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-02 | 1972-02-01 | 1972-08-02 | $7700.00 | Window Closed / Lapsed |