Patents by Inventor Louis J. Glunz

Louis J. Glunz 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).

  • 8-Methoxypsoralen
    Patent number: 4129575
    Abstract: 8-Methoxypsoralen is prepared in six steps from pyrogallol including hydrogenation of 6,7-dihydroxy-2,3-dihydrobenzofuran and dehydrogenation of 2,3-dihydroxanthotoxin. Improvements in these two steps lead to a marked overall increase in yield.
    Type: Grant
    Filed: April 12, 1976
    Date of Patent: December 12, 1978
    Assignee: Thomas C. Elder, Inc.
    Inventors: Louis J. Glunz, Donald E. Dickson
  • Process for making .omega.-chloro-2,3,4-trihydroxyacetophenone
    Patent number: 4129576
    Abstract: 8-Methoxypsoralen is prepared in six steps from pyrogallol including condensation of pyrogallol with a two-fold excess of chloroacetic acid with boron trifluoride hydrogenation of 6,7-dihydroxy-2,3-dihydrobenzofuran and dehydrogenation of 2,3-dihydroxanthotoxin. Improvements in these three steps lead to a marked overall increase in yield.
    Type: Grant
    Filed: June 24, 1976
    Date of Patent: December 12, 1978
    Assignee: Thomas C. Elder, Inc.
    Inventors: Louis J. Glunz, Donald E. Dickson
  • 8-Methoxypsoralen
    Patent number: RE30376
    Abstract: 8-Methoxypsoralen is prepared in six steps from pyrogallol including hydrogenation of .[.6,7-dihydroxy-2,3-dihydrobenzofuran.]. .Iadd.6,7-dihydroxycoumaranone .Iaddend.and dehydrogenation of .[.2,3.]. .Iadd.4',5'.Iaddend.-dihydroxanthotoxin. Improvements in these two steps lead to a marked overall increase in yield.
    Type: Grant
    Filed: August 20, 1979
    Date of Patent: August 19, 1980
    Assignee: Thomas C. Elder, Inc.
    Inventors: Louis J. Glunz, Donald E. Dickson
  • Process for making .omega.-chloro-2,3,4-trihydroxyacetophenone
    Patent number: RE30377
    Abstract: 8-Methoxypsoralen is prepared in six steps from pyrogallol including condensation of pyrogallol with a two-fold excess of chloroacetic acid with boron trifluoride hydrogenation of .[.6,7-dihydroxy-2,3-dihydrobenzofuran.]. .Iadd.6,7-dihydroxycoumaranone .Iaddend.and dehydrogenation of .[.2,3.]. .Iadd.4',5'.Iaddend.-dihydroxanthotoxin. Improvements in these three steps lead to a marked overall increase in yield.
    Type: Grant
    Filed: August 20, 1979
    Date of Patent: August 19, 1980
    Assignee: Thomas C. Elder, Inc.
    Inventors: Louis J. Glunz, Donald E. Dickson