Patent US3028439A successfully refreshed from Google Patents.
Patent US2959579A successfully refreshed from Google Patents.
US2959579A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization of ethylene and catalyst therefor
Assignee: Individual
•
Filing: 1958-05-27
•
Granted: 1960-11-08
•
Expires: 1978-05-27
Abstract
No abstract record available.
Inventors
- 👤 Reed Hugh Wilma Boulton
- 👤 Smith Peter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:46
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
57 words
A CATALYST SUITABLE FOR THE POLYMERIZATION OF ETHYLENE CONSISTING ESSENTIALLY OF THE PRODUCT OBTAINED BY MIXING TITANIUM TETRACHLORIDE WITH AN ALUMINUM TRI-LOWER ALKYL IN A MOLAR RATIO OF SAID ALUMINUM TRI-LOWER ALKYL TO TETRACHLORIDE OF FROM 8.3-8.5 TO 1, AND ABOUT 20% BY WEIGHT, BASED ON THE WEIGHT OF SAID ALUMINUM TRI-LOWER ALKYL, OF ETHYL ALUMINUM SESQUICHLORIDE.
Claim 2
Dependent Claim
57 words
A CATALYST SUITABLE FOR THE POLYMERIZATION OF ETHYLENE CONSISTING ESSENTIALLY OF THE PRODUCT OBTAINED BY MIXING TITANIUM TETRACHLORIDE WITH AN ALUMINUM TRI-LOWER ALKYL IN A MOLAR RATIO OF SAID ALUMINUM TRI-LOWER ALKYL TO TETRACHLORIDE OF FROM 8.3-8.5 TO 1, AND ABOUT 20% BY WEIGHT, BASED ON THE WEIGHT OF SAID ALUMINUM TRI-LOWER ALKYL, OF ETHYL ALUMINUM SESQUICHLORIDE.
Claim 3
Dependent Claim
20 words
A PROCESS FOR THE POLYMERIZATION OF ETHYLENE WHICH COMPRISES BRINGING SAID ETHYLENE INTO CONTACT WITH THE CATALYST OF CLAIM 1.
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) | 1963-11-08 | 1964-05-09 | 1964-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-08 | 1968-05-09 | 1968-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-08 | 1972-05-09 | 1972-11-08 | $7700.00 | Window Closed / Lapsed |