Patents by Inventor Herbert Knabe

Herbert Knabe 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).

  • Patent number: 4184003
    Abstract: Solvent hectograph compositions which are resistant to rapid thickening and gelling during storage in the presence of ambient humidity comprising a cellulose ether film-forming binder material, at least one oleaginous material which is substantially incompatible with said binder material and a major amount by weight of particulate spirit-soluble solid hectograph imaging material, the volatile solvent for said binder material being a lower aliphatic ester which is a substantial non-solvent for said imaging material and which has a partial miscibility with water, the process of making such compositions and the process of producing pressure-sensitive transfer elements from said compositions.
    Type: Grant
    Filed: April 4, 1977
    Date of Patent: January 15, 1980
    Assignee: Columbia Ribbon & Carbon Mfg. Co., Inc.
    Inventors: Herbert Knabe, Allan T. Schlotzhauer, Michael A. Scott