Patents by Inventor Gerhard Apel

Gerhard Apel 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).

  • Blowing agent mixture
    Patent number: 4110273
    Abstract: The invention refers to a blowing agent composition consisting of 1,4 butan-diol-bis-(carbonic acid ester-benzoic acid anhydride) and silicon dioxide. Silicon dioxide reduces the decomposition temperature of the anhydride while at the same time increasing the yield of gas substantially.
    Type: Grant
    Filed: September 12, 1977
    Date of Patent: August 29, 1978
    Assignee: Bayer Aktiengesellschaft
    Inventors: Wolfgang Cohnen, Gerhard Apel
  • Blowing agent mixture
    Patent number: 4065401
    Abstract: The invention refers to a blowing agent composition consisting of 1,4 butan-diol-bis-(carbonic acid ester-benzoic acid anhydride) and silicon dioxide. Silicon dioxide reduces the decomposition temperature of the anhydride while at the same time increasing the yield of gas substantially.
    Type: Grant
    Filed: August 22, 1975
    Date of Patent: December 27, 1977
    Assignee: Bayer Aktiengesellschaft
    Inventors: Wolfgang Cohnen, Gerhard Apel
  • Stabilized acrylic acid esters of polyhydric alcohols and a process for their preparation
    Patent number: 4053504
    Abstract: Stabilized acrylic acid esters of polyhydric alcohols which contain as stabilizers polymerisation inhibitors including small amounts of compounds of the styrene type show a non-reduced polymerisation reactivity.
    Type: Grant
    Filed: June 14, 1976
    Date of Patent: October 11, 1977
    Assignee: Bayer Aktiengesellschaft
    Inventors: Hans Jurgen Rosenkranz, Hans Rudolph, Gerhard Apel