Patent US1720727A successfully refreshed from Google Patents.
Patent US3194800A successfully refreshed from Google Patents.
US3194800A
Expired / Lapsed
US
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Polymerization of ethylene with cyanides
Assignee: Millennium Petrochemicals Inc
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Filing: 1962-10-23
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Granted: 1965-07-13
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Expires: 1982-10-23
Abstract
No abstract record available.
Inventors
- 👤 Angus U Blackham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:03
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
55 words
A PROCESS FOR PREPARING A NORMALLY SOLID POLYMER OF AN ALPHA-OLEFIN WHICH COMPRISES CONTACTING SAID ALPHAOLEFIN COMPOUND UNDER A TEMPERATURE ABOVE 50*C. AND SUPERATMOSPHERIC PRESSURE WITH A CATALYTIC AMOUNT OF A CATALYST CONSISTING OF A CYANIDE SALT OF A METAL SELECTED FROM THE GROUP CONSISTING OF GROUPS, IB, IIB, AND VIII OF THE PERIODIC SYSTEM.
Claim 2
Dependent Claim
55 words
A PROCESS FOR PREPARING A NORMALLY SOLID POLYMER OF AN ALPHA-OLEFIN WHICH COMPRISES CONTACTING SAID ALPHAOLEFIN COMPOUND UNDER A TEMPERATURE ABOVE 50*C. AND SUPERATMOSPHERIC PRESSURE WITH A CATALYTIC AMOUNT OF A CATALYST CONSISTING OF A CYANIDE SALT OF A METAL SELECTED FROM THE GROUP CONSISTING OF GROUPS, IB, IIB, AND VIII OF THE PERIODIC SYSTEM.
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) | 1968-07-12 | 1969-01-11 | 1969-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-07-12 | 1973-01-11 | 1973-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-07-12 | 1977-01-11 | 1977-07-13 | $7700.00 | Window Closed / Lapsed |