US3051690A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for polymerizing olefins wherein hydrogen is utilized as a molecular weight control agent
Assignee: Hercules Powder Co
•
Filing: 1955-07-29
•
Granted: 1962-08-28
•
Expires: 1975-07-29
Abstract
No abstract record available.
Inventors
- 👤 Edwin J Vandenberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:27
CPC Classifications
C; C08; C08F; C08F36/00; C08F36/02; C08F36/04; C08F212/00; C08F212/02; C08F212/04; C08F212/06; C08F212/08; Y; Y10; Y10S; Y10S260/00; Y10S260/25; Y10S526/00; Y10S526/905
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
110 words
IN A PROCESS FOR THE COPOLYMERIZATION OF AT LEAST TWO ETHYLENICALLY UNSATURATED HYDROCARBONS WHEREIN A MIXTURE OF AT LEAST TWO ETHYLENICALLY UNSATURATED HYDROCARBONS IS CONTACTED WITH AT LEAST A CATALYTIC AMOUNT OF A CATALYST, FORMED BY MIXING A COMPOUND OF A METAL SELECTED FROM THE GROUP CONSISTING OF METALS OF GROUPS IV-B, V-B, AN ORGANOMETALLIC COMPOUND OF A METAL SELECTED FROM THE AN ORGANOMETALLIC COMPOUND OF A METAL SELECTED FROM THE GROUP CONSISTING OF ALKALI METALS, ALKALINE EARTH METALS, ZINC, EARTH METAL AND THE RARE EARTH METALS, THE STEP OF ADDING HYDROGEN, IN AN AMOUNT OF AT LEAST ABOUT 0.001 MOLE PERCENT OF SAID UNSATURATED HYDROCARBONS, TO THE POLYMERIZATION 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) | 1965-08-27 | 1966-02-26 | 1966-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-08-27 | 1970-02-26 | 1970-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-08-27 | 1974-02-26 | 1974-08-28 | $7700.00 | Window Closed / Lapsed |