Patents by Inventor Roland Bitsch

Roland Bitsch 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).

  • Procedure and agent for the determination of nitrate ions
    Patent number: 5236848
    Abstract: The invention relates to a procedure and agent for the colorimetric determination of nitrate ions in aqueous solutions by mixing the sample which is to be investigated with resorcinol and a mixture of sulfuric acid and phosphoric acid, characterized in that at least 2 g/l, preferably about 10 to 30 g/l chloride ions are also added.
    Type: Grant
    Filed: March 7, 1991
    Date of Patent: August 17, 1993
    Assignee: Merck Patent Gesellschaft mit beschrankter Haftung
    Inventor: Roland Bitsch
  • Method, reagent and kit for the determination of nitrate ions
    Patent number: 4690902
    Abstract: A method for the colorimetric determination of nitrate ions comprises mixing the sample which is to be investigated with concentrated sulfuric acid and a color-generating compound of the formula ##STR1## wherein R is H, one equivalent of a cation, or C.sub.1-6 alkyl. A reagent and kit for colorimetric nitrate determination are also described.
    Type: Grant
    Filed: February 15, 1985
    Date of Patent: September 1, 1987
    Assignee: Merck Patent Gesellschaft mit beschrankter Haftung
    Inventor: Roland Bitsch
  • Reagent and method for the determination of hydrazine
    Patent number: 4395494
    Abstract: 4-dimethylaminocinnamaldehyde can be used as a reagent for determination of hydrazine in an aqueous solution. The reagent is especially stable and useful when dissolved in an ethylene glycol monoalkyl ether.
    Type: Grant
    Filed: October 24, 1980
    Date of Patent: July 26, 1983
    Assignee: Merck Patent Gesellschaft mit Beschrankter Haftung
    Inventors: Detlef Bodart, Roland Bitsch