Patents Represented by Law Firm Milen & White
  • Process for the production of allergen-containing extracts
    Patent number: 4031199
    Abstract: Improved allergen-containing extracts are obtained by the extraction of allergy-causing materials, such as pollen and house dust, with hydrophilic aqueous extractants, by pretreating the allergen-containing material with a lipophilic, aqueous extraction liquid. Allergens extracted in the two steps can be combined and formed into allergen preparations, which can be used both for diagnostic and therapeutic purposes.
    Type: Grant
    Filed: December 15, 1975
    Date of Patent: June 21, 1977
    Assignee: Merck Patent Gesellschaft mit beschrankter Haftung
    Inventors: Otto Nieschulz, Gunther Rudiger, Jurgen Maass