US3081291A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ethylene polymerization with a catalyst containing a chromium salt of a solid polymer containing methacrylic acid
Assignee: Honeywell International Inc
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Filing: 1959-05-07
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Granted: 1963-03-12
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Expires: 1979-05-07
Abstract
No abstract record available.
Inventors
- 👤 Henry H Richmond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:57
CPC Classifications
C; C08; C08F; C08F10/00; C08F265/00; C08F265/02; C08F8/00; C08F8/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
THE IMPROVEMENT IN PROCESS FOR POLYMERIZING ETHYLENE TO SOLID POLYMERS IN PRESENCE OF AN ORGANIC COMPOUND OF CHROMIUM TOGETHER WITH A REDUCING-DEHYDRATING METAL COMPOUND ACTIVATOR WHICH COMPRISES UTILIZING AS SAID CHROMIUM COMPOUND A SALT OF CHROMIUM AND A SOLID METHACRYLIC ACID COPOLYMER WITH A MAJOR PROPORTION BY WEIGHT OF ETHYLENICALLY UNSATURATED NEUTRAL COMONOMER FORMED BY HETEROGENEOUS POLYMERIZATION IN A NON-SOLVENT MEDIUM, THE CHROMIUM SALT BEING FORMED FROM SAID POLYMER WITHOUT DISSOLVING POLYMER AND CONTAINING BETWEEN ABOUT 0.1% AND ABOUT 5% BY WEIGHT OF CHROMIUM, SAID CHROMIUM BEING TRIVALENT AND ELECTROVALENTLY BOUND IN SAID SALT.
Claim 2
Dependent Claim
94 words
THE IMPROVEMENT IN PROCESS FOR POLYMERIZING ETHYLENE TO SOLID POLYMERS IN PRESENCE OF AN ORGANIC COMPOUND OF CHROMIUM TOGETHER WITH A REDUCING-DEHYDRATING METAL COMPOUND ACTIVATOR WHICH COMPRISES UTILIZING AS SAID CHROMIUM COMPOUND A SALT OF CHROMIUM AND A SOLID METHACRYLIC ACID COPOLYMER WITH A MAJOR PROPORTION BY WEIGHT OF ETHYLENICALLY UNSATURATED NEUTRAL COMONOMER FORMED BY HETEROGENEOUS POLYMERIZATION IN A NON-SOLVENT MEDIUM, THE CHROMIUM SALT BEING FORMED FROM SAID POLYMER WITHOUT DISSOLVING POLYMER AND CONTAINING BETWEEN ABOUT 0.1% AND ABOUT 5% BY WEIGHT OF CHROMIUM, SAID CHROMIUM BEING TRIVALENT AND ELECTROVALENTLY BOUND IN SAID SALT.
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) | 1966-03-11 | 1966-09-10 | 1967-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-03-11 | 1970-09-10 | 1971-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-03-11 | 1974-09-10 | 1975-03-12 | $7700.00 | Window Closed / Lapsed |