US3770852A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyolefin resin blends
Assignee: Millennium Petrochemicals Inc
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Filing: 1966-04-12
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Granted: 1973-11-06
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Expires: 1986-04-12
Abstract
Abstract POLYOLEFINS HAVING BROAD POLYMODAL MOLECULAR WEIGHT DISTRIBUTION AND IMPROVED ENVIROMENTAL STRESS CRACK RESISTANCE ARE PREPARED BY CATALYTICALLY POLYMERIZING AN OLEFIN. E. G. ETHYLENE OF A MIXTURE OF ETHYLENE AND VINYL ACETATE IN A FIRST REACTION REGION, PASSING THE RESULTING REACTION PRODUCT TO A SECOND REACTION REGION INTO WHICH A SECOND OLEFIN GAS STREAM IS FED AND POLYMERIZED AND BLENDING THE POLYMERIZATION PRODUCT FROM SAID SECOND REACTION REGION WITH A ETHYLENE-VINYL ACETATE COPOLYMER.
Inventors
- 👤 J Hager
- 👤 J Eisenhauer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:28
CPC Classifications
C; C08; C08F; C08F10/00; C08L; C08L23/00; C08L23/02; C08L23/04; C08L23/08; C08L23/0846; C08L23/0853; C08L31/00; C08L31/02; C08L31/04; C08L2205/00; C08L2205/02; C08L2205/03; C08L2205/035; C08L23/06; C08L2308/00
Claims Analysis
Total Claims: 0
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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) | 1976-11-05 | 1977-05-07 | 1977-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-05 | 1981-05-07 | 1981-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-05 | 1985-05-07 | 1985-11-06 | $7700.00 | Window Closed / Lapsed |