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US3835107A Expired / Lapsed US ⏱️ 0.0 years remaining

Production of low molecular weight waxy polyethylenes

Assignee: BASF SE
•
Filing: 1972-09-25
•
Granted: 1974-09-10
•
Expires: 1992-09-25
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Abstract

Abstract A PROCESS FOR THE PRODUCTION OF WAXY, LOW MOLECULAR WEIGHT POLYETHYLENES IN WHICH ETHYLENE IS POLYMERIZED UNDER THE ACTION OF A POLYMERIZATION INITIATOR WHICH FORMS FREE RADICALS AND IN THE PRESENCE OF A POLYMERIZATION REGULATOR AT ELEVATED TEMPERATURE AND AT SUPERATMOSPHERIC PRESSURE. IT IS A CHARACTERISTIC OF THE PROCESS ACCORDING TO THE INVENTION THAT AS THE FREE RADICAL-FORMING POLYMERIZATION INITIATOR THERE ARE JOINTLY USED: (1) A SPECIFIC AMOUNT OF AN ORGANIC PEROXIDE HAVING A HALF-LIFE TEMPERATURE OF FROM 60* TO 112*C., AND (2) A SPECIFIC AMOUNT OF OXYGEN. HIGH YIELDS CAN BE OBTAINED BY THE PROCESS AND A PRODUCT CAN BE OBTAINED WHICH HAS PARTICULARLY GOOD OIL-BINDING PROPERTIES.

Inventors

  • 👤 F Urban
  • 👤 H Pfannmueller
  • 👤 K Stark
  • 👤 H Gropper

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-05 18:55
CPC Classifications
C; C08; C08F; C08F10/00; Y; Y10; Y10S; Y10S585/00; Y10S585/929; Y10S585/942; Y10S585/946

Claims Analysis

Total Claims: 0
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References Cited (Backward Citations)

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USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1977-09-09 1978-03-11 1978-09-10 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1981-09-09 1982-03-11 1982-09-10 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1985-09-09 1986-03-11 1986-09-10 $7700.00 Window Closed / Lapsed

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