Patent US4695509A successfully refreshed from Google Patents.
US3755500A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyolefin compositions comprising polymerized 4-methyl-pentene-1
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1970-01-22
•
Granted: 1973-08-28
•
Expires: 1990-01-22
Abstract
Abstract A POLYMERIC COMPOSITION OF 4-METHYL PENTENE-1 HAVING DISPERSED THROUGH IT A SMALL PROPORTION OF POLYMERIZED UNITS OF AN ALIPHATIC OLEFIN, THE HOMOPOLYMER OF SAID ALIPHATIC OLEFIN HAVING A MELTING POINT ABOVE 275*C., PREFERABLY ABOVE 320*C. THE COMPOSITION MAY ALSO INCLUDE UNITS OF A LINEAR 1-OLEFIN HAVING 4 TO 18 CARBON ATOMS. THE COMPOSITION IS PREPARED BY SEQUENTIAL POLYMERIZATION OF 4-METHYL PENTENE-1 AND THE ALIPHATIC OLEFIN. THE COMPOSITION MAY BE MOULDED INTO ARTICLES HAVING A MEAN SPHERULITE SIZE OF LESS THAN 5 MICRONS, WHICH, IF THE POLYMER HAS A LOW ASH CONTENT, MAY HAVE A LIGHT TRANSMISSION OF 1/8" SECTION OF AT LEAST 90%.
Inventors
- 👤 K Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:56
CPC Classifications
C; C08; C08F; C08F10/00; C08F10/14; C08F255/00; C08F255/08; C08L; C08L23/00; C08L23/02; C08L23/18; C08L23/20
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-27 | 1977-02-26 | 1977-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-27 | 1981-02-26 | 1981-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-27 | 1985-02-26 | 1985-08-28 | $7700.00 | Window Closed / Lapsed |