Patents by Inventor Hideki Aiura

Hideki Aiura has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Process for producing a norbornene polymer
    Patent number: 5344900
    Abstract: A process for producing a norbornene polymer consisting essentially of a repeating unit of the formula (I) ##STR1## wherein R.sup.1 to R.sup.12 are the same or different and are hydrogen, C.sub.1 -C.sub.20 hydrocarbon, or a group having a halogen, oxygen or nitrogen, R.sup.5 and R.sup.7 may combine to form a ring, and n is an integer of 0 or more; and having a weight average molecular weight as determined by GPC of 1.times.10.sup.5 to 1.times.10.sup.7. The process comprises polymerizing a norbornene monomer of the formula (II) ##STR2## wherein R.sup.1 to R.sup.12 are the same or different and are independently hydrogen, C.sub.1 -C.sub.20 hydrocarbon, or a substituent containing a halogen atom, an oxygen atom or a nitrogen atom; R.sup.5 and R.sup.
    Type: Grant
    Filed: April 30, 1993
    Date of Patent: September 6, 1994
    Assignee: Idemitsu Kosan Company Limited
    Inventors: Hiroshi Maezawa, Junichi Matsumoto, Hideki Aiura, Satoshi Asahi