Patents by Inventor Hiromu Tsuchiya

Hiromu Tsuchiya 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).

  • Manufacturing method for alkyldihalogenophosphines
    Patent number: 4857238
    Abstract: A manufacturing method for an alkyldihalogenophosphine uses an alkyl halide and a trihalide of phosphorus as starting materials. A reaction product which is formed by an FC reaction is reduced by yellow phosphorus in the presence of iodine, whereby an alkyldihalogenophosphine is manufactured. A high-purity alkyldihalogenophosphine can be manufactured with a high yield by using an excess amount of a trihalide of phosphorus, which can act as a reaction solvent.
    Type: Grant
    Filed: July 28, 1988
    Date of Patent: August 15, 1989
    Assignee: Nippon Chemical Industrial Co., Ltd.
    Inventors: Hiromu Tsuchiya, Shukichi Nabekawa, Masao Takada