Patents Assigned to Battelle Ingenieurtechnik GmbH
  • Process for restrengthening damaged paper and product produced thereby
    Patent number: 5482781
    Abstract: Process for restrengthening damaged paper, in which the aged, acid-damaged friable paper is treated with a solution containing isocyanate or with isocyanate vapour. Isocyanates having two or more isocyanate groups are preferably used.
    Type: Grant
    Filed: November 10, 1994
    Date of Patent: January 9, 1996
    Assignee: Battelle Ingenieurtechnik GmbH
    Inventors: Jurgen Wittekind, Karl-Heinz Scherer
  • Neutralizing agent for paper products
    Patent number: 5322558
    Abstract: A neutralizing agent for effective but mild mass de-acidification of books and other paper products, consisting of a solution of one or more kinds of double alkoxides, each with one alkoxide of a metal promoting solubility, such as group IV metals, aluminum or tin, and one alkoxide of a metal binding the acids in the paper, such as alkali or alkaline earth metals, wherein a non-polar solvent can be used, which exhibits good compatibility with the archive materials.
    Type: Grant
    Filed: November 20, 1992
    Date of Patent: June 21, 1994
    Assignee: Battelle Ingenieurtechnik GmbH
    Inventors: Jurgen Wittekind, Rolf Eggersdorfer, Peter Schwerdt, Karl-Heinz Scherer, Rolf-Erhard Schmitt