Patents by Inventor Dietmar Schapel

Dietmar Schapel 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).

  • Stable polymer gels
    Patent number: 4160754
    Abstract: This invention is directed to gels which are stable in storage, comprising a polymer matrix, a liquid dispersing agent embedded therein and optionally fillers or additives, characterized in that said polymer matrix is a polycondensation product of aldehydes and aminoplast-formers, at least 30% by weight of the aminoplast-formers having a molecular weight of between 200 and 10,000 and containing at least one ether, thioether, acetal, ester, urethane and/or carbonate group.
    Type: Grant
    Filed: March 13, 1978
    Date of Patent: July 10, 1979
    Assignee: Bayer Aktiengesellschaft
    Inventors: Dietmar Schapel, Kuno Wagner, Hanns P. Muller, Manfred Dahm
  • Process for the production of thermoformable polyisocyanurate foams
    Patent number: 4129697
    Abstract: The invention relates to thermoformable polyisocyanurate foams which are produced by reacting a polymethylene polyphenyl polyisocyanate having a specified diisocyanate content with polyethers which have an OH number between 28 and 112 and dihydric alcohols which have a molecular weight between 62 and 200 in the presence of isocyanate trimerization catalysts, blowing agents and other foaming agents.
    Type: Grant
    Filed: February 4, 1977
    Date of Patent: December 12, 1978
    Assignee: Bayer Aktiengesellschaft
    Inventors: Dietmar Schapel, Ulrich VON Gizycki
  • Elastomeric polyurethane-based articles having an insecticidal depot gas action
    Patent number: 4094970
    Abstract: In an insecticidal article comprising an insecticidally effective amount of at least one volatile phosphoric or thiophosphoric acid ester and a solid polyurethane carrier material, the improvement wherein said polyurethane is an elastomeric polyurethane, whereby the article retains its activity over a long period of time. The polyurethane is formed of a polyisocyanate and a mixture of a long chain polyol and a short chain polyol and/or polyamine.
    Type: Grant
    Filed: August 12, 1976
    Date of Patent: June 13, 1978
    Assignee: Bayer Aktiengesellschaft
    Inventors: Wolfgang Behrenz, Dietmar Schapel, Manfred Dahm
  • Mixed polyols
    Patent number: 4029593
    Abstract: Mixtures of polyols which normally separate into phases are stabilizeed against such separation by including in the mixture a stabilizing amount, preferably from about 0.05% to about 5% based on the weight of polyols in the mixture of an inert surface-active inorganic material having a specific surface of about 10 to about 800 m.sup.2 /g.
    Type: Grant
    Filed: August 12, 1974
    Date of Patent: June 14, 1977
    Assignee: Bayer Aktiengesellschaft
    Inventors: Dietmar Schapel, Ulrich VON Gizycki