Patents by Inventor Sirpa A. Tuomi

Sirpa A. Tuomi 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).

  • Method for producing 6,7-dimethoxy-4-amino-2-[4-(2-furoyl)-1-piperazinyl] q u
    Patent number: 4271300
    Abstract: An improved method is disclosed for producing antihypertensively active 6,7-dimethoxy-4-amino-2-[4-(2-furoyl)-1-piperazinyl] quinazoline hydrochloride, viz prazosine hydrochloride, by reacting methyl-N-(3,4-dimethoxy-6-cyano-phenyl)-[4-(2-furoyl)-1-piperazinyl]thiofo rmamidate with a large excess of ammonium chloride.
    Type: Grant
    Filed: January 9, 1980
    Date of Patent: June 2, 1981
    Assignee: Orion-yhtyma Oy
    Inventors: Erkki J. Honkanen, Aino K. Pippuri, Pekka J. Kairisalo, Heinrich Thaler, Maija K. Koivisto, Sirpa A. Tuomi