Patents by Inventor Marinus J. A. M. den Otter

Marinus J. A. M. den Otter 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: 4174444
    Abstract: An improved process for the manufacture of cyanuric acid by heating a reaction solution of urea, biuret, or mixtures thereof, in a solvent and stripping the reaction solution with a stripping gas. The process recycles waste gas produced by the reaction solution as the stripping gas.
    Type: Grant
    Filed: March 27, 1978
    Date of Patent: November 13, 1979
    Assignee: Stamicarbon, B.V.
    Inventors: Marinus J. A. M. den Otter, Lambertus P. G. Hawinkels, Augustinus P. H. Schouteten
  • Patent number: 4167631
    Abstract: An improved process for the manufacture of cyanuric acid by heating a reaction solution of urea, biuret or mixtures thereof in a solvent and stripping the reaction solution with an inert auxiliary stripping gas. The inert auxiliary stripping gas is characterized as having a boiling point which ranges between that of ammonia and the reaction temperature at the reaction pressure.
    Type: Grant
    Filed: March 27, 1978
    Date of Patent: September 11, 1979
    Assignee: Stamicarbon, B.V.
    Inventors: Augustinus P. H. Schouteten, Marinus J.A.M. Den Otter
  • Patent number: 4140660
    Abstract: Flame-retarding compounds are disclosed which are of the formula ##STR1## wherein X is a phosphorus derivative.
    Type: Grant
    Filed: October 17, 1977
    Date of Patent: February 20, 1979
    Assignee: Stamicarbon, B.V.
    Inventors: Marinus J. A. M. Den Otter, Albert A. Van Geenen, Anne Te Mijenhuis
  • Patent number: 4136215
    Abstract: The invention disclosed is a process for the production of a cellular thermosetting foam provided on at least one surface with a reinforcing and fire resisting layer of particulate material. A foamable composition is distributed on a suitable substrate surface and a layer of particulate material is evenly distributed on the surface of said composition prior to complete curing. As inexpensive material such as sand or gravel may be used, the process is economic and easy to apply. It can be used for the production of slabs of cellular plastic or of foam layers with a protective coating on e.g. wall panels, roofs, insulating material and the like.
    Type: Grant
    Filed: January 15, 1976
    Date of Patent: January 23, 1979
    Assignee: Stamicarbon, B.V.
    Inventors: Marinus J. A. M. den Otter, Anne TE Nijenhuis
  • Patent number: 4085283
    Abstract: Flame retarding compounds are disclosed which are of the formula ##STR1## wherein X is a phosphonate derivative.
    Type: Grant
    Filed: April 19, 1976
    Date of Patent: April 18, 1978
    Assignee: Stamicarbon, B.V.
    Inventors: Marinus J. A. M. Den Otter, Albert A. Van Geenen, Anne Te Nijenhuis
  • Patent number: 4031040
    Abstract: New polyurethanes containing free isocyanurate rings are produced by mixing a hydroxymethyl isocyanurate or a derivative thereof with a polyisocyanate or a mixture of polyisocyanates.
    Type: Grant
    Filed: June 20, 1975
    Date of Patent: June 21, 1977
    Assignee: Stamicarbon B.V.
    Inventors: Marinus J.A.M. Den Otter, Anne Te Nijenhuis, Albert A. Van Geenen
  • Patent number: 4014952
    Abstract: Preparation of isoprene by conversion of isobutylene or an isobutylene-containing composition with formaldehyde in the gas phase, according to a one-step method, at temperatures of 150.degree. - 400.degree. C, and in the presence of a catalyst.
    Type: Grant
    Filed: July 15, 1975
    Date of Patent: March 29, 1977
    Assignee: Stamicarbon B.V.
    Inventors: Eduard H. Adema, Albert A. Van Geenen, Marinus J. A. M. Den Otter
  • Patent number: 3994892
    Abstract: The process of the invention is directed to an improvement in purifying cyanuric acid which contains as a contaminant, an enclosed residue of a solvent used in the reaction mediums to produce cyanuric acid from urea, biuret or mixtures thereof. The process comprises suspending the impure cyanuric acid in an aqueous medium and stirring. As a result of the process, cyanuric acid is substantially freed from enclosed residues of contaminants solvents.
    Type: Grant
    Filed: October 29, 1975
    Date of Patent: November 30, 1976
    Assignee: Stamicarbon B.V.
    Inventors: Marinus J. A. M. Den Otter, Augustinus P. H. Schouteten, Lambertus P. G. Hawinkels
  • Patent number: 3956299
    Abstract: An improved process for forming cyanuric acid wherein urea and/or biuret, dissolved in a solvent, are heated in the presence of a dissolved acid or a corresponding anhydride or ammonium salt to produce cyanuric acid so that byproducts ammeline and ammelide are produced in amounts no greater than 1 % by weight of the product.
    Type: Grant
    Filed: April 24, 1975
    Date of Patent: May 11, 1976
    Assignee: Stamicarbon B.V.
    Inventors: Marinus J. A. M. den Otter, Lambertus P. G. Hawinkels, Augustinus P. H. Schouteten