US3258456A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of polyolefin films
Assignee: Phillips Petroleum Co
•
Filing: 1963-01-14
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Granted: 1966-06-28
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Expires: 1983-01-14
Abstract
No abstract record available.
Inventors
- 👤 William M Nelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:35
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/32; C08K5/33; C08K5/34; C08K5/3412; C08K5/3432; C08K5/3437; Y; Y10; Y10S; Y10S8/00; Y10S8/09
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
107 words
A METHOD OF FORMING A FILM HAVING IMPROVED TRANSPARENCY FROM A POLYOLEFIN, SAID POLYOLEFIN HAVING BEEN PREPARED IN THE PRESENCE OF AN ALUMINUM AND TITANIUM CONTAINING CATALYST COMPOSITION, THE CATALYST COMPONENTS HAVING BEEN SUBSTANTIALLY REMOVED FROM SAID POLYOLEFIN BY CONTACT WITH A TREATING AGENT COMPRISING A DICARBONYL EXTRACTANT, COMPRISING: (A) INCORPORATING A COMPOUND SELECTED FROM THE GROUP CONSISTING OF DIMETHYLGLYOXIME AND 8-HYDROXYQUINOLINE INTO SAID POLYOLEFIN, SAID COMPOUND BEING DISSOLVED IN AN ORGANIC SOLVENT; (B) PERMITTING THE THUS TREATED POLYOLEFIN TO STAND UNDER CONDITIONS OF TEMPERATURE AND PRESSURE SO AS TO VOLATILIZE SUBSTANTIALLY ALL OF SAID ORGANIC SOLVENT; AND (C) EXTRUDING THE THUS TREATED POLYOLEFIN INTO A FILM.
References Cited (Backward Citations)
US3037011A
Cited
BE554363A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-06-27 | 1969-12-27 | 1970-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-27 | 1973-12-27 | 1974-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-27 | 1977-12-27 | 1978-06-28 | $7700.00 | Window Closed / Lapsed |