Patents by Inventor Harald Wulff

Harald Wulff 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).

  • Process for the manufacture of polyisocyanurate foams
    Patent number: 4066580
    Abstract: A process for the manufacture of urethane group containing polyisocyanurate foams produced by mixing polyisocyanates and polyols and (if required) frothing agents, auxiliaries and additives in the presence of a co-catalyst system which consists of a 1,3,5-tris(N,N-dialkylaminoalkyl)-s-hexahydrotriazine and an organic mono- or polycarboxylic acid, a polyesterol with an acid number greater than 4 or a mono-ester of polycarboxylic acid.
    Type: Grant
    Filed: June 7, 1976
    Date of Patent: January 3, 1978
    Assignee: BASF Wyandotte Corporation
    Inventors: Georg Falkenstein, Gerhard Fahrbach, Harald Wulff
  • Process for the manufacture of polyethers from bisphenates and sulfonyl halides
    Patent number: 4039511
    Abstract: Process for the manufacture of polyethers, particularly sulfonyl group-containing aromatic polyethers. Alkali metal bisphenolates are reacted with arylsulfonyl halides and polycondensed. The polyethers are plastics which are resistant to high temperatures and may be used for making electrical appliances and circuits, household articles and sheeting.
    Type: Grant
    Filed: October 14, 1975
    Date of Patent: August 2, 1977
    Assignee: BASF Aktiengesellschaft
    Inventors: Harald Wulff, Gerd Blinne