Patents by Inventor Piotr S. Wojciechowski

Piotr S. Wojciechowski 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).

  • High pressure synthesis of sulfur-selenium fulvalenes
    Patent number: 4465845
    Abstract: A process is disclosed for one-step preparation of sulfur-selenium fulvalenes by reaction of an acetylenic compound with carbon selenide sulfide or with a mixture of carbon diselenide and carbon disulfide under pressures of at least about 1,000 atmospheres. Fulvalene compounds made by the process are characterized in having at least one sulfur atom and at least one selenium atom in the ring structure of the fulvalene compound. Substituted diselenadithiafulvalenes made by this process are precursors to very pure diselenadithiafulvalene which is useful in preparing charge-transfer salts.
    Type: Grant
    Filed: April 26, 1982
    Date of Patent: August 14, 1984
    Assignee: Koppers Company, Inc.
    Inventors: Yoshiyuki Okamoto, Piotr S. Wojciechowski
  • Substituted teraselenafulvalenes and high pressure synthesis thereof
    Patent number: 4402875
    Abstract: A process is disclosed for one-step preparation of substituted tetraselenafulvalenes by reaction of carbon diselenide with acetylenic compounds under pressures of at least about 1,000 atmospheres. Substituted tetraselenafulvalenes made by this process are useful as precursors to very pure tetraselenafulvalene and are useful in forming complexes with certain inorganic anions to provide charge-transfer salts having very high electrical conductivity.
    Type: Grant
    Filed: September 18, 1981
    Date of Patent: September 6, 1983
    Assignee: Koppers Company, Inc.
    Inventors: Yoshiyuki Okamoto, Piotr S. Wojciechowski