Patents by Inventor Vaclav Kaspar

Vaclav Kaspar 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).

  • Process for the preparation of improved dyestuff granules from suspension containing a propylene oxide-ethylene oxide copolymer
    Patent number: 5213583
    Abstract: To prepare storage-stable, low-dusting dyestuff granules which are readily soluble in plastics, a suspension of the dyestuff containing 0.1-5% by weight of a polyglycol are dried while being granulated.
    Type: Grant
    Filed: November 21, 1991
    Date of Patent: May 25, 1993
    Assignee: Bayer Aktiengesellschaft
    Inventors: Vaclav Kaspar, Horst Brandt, Gottfried Popp
  • Process for the preparation of granules
    Patent number: 4846409
    Abstract: Low-dust, storage-stable granules are obtained in a continuous operating process in which the powder to be granulated is granulated in succession in a high-speed and low-speed mixing granulator, with the addition of a granulating liquid, and is then dried in a fluidized bed into which a liquid containing a binder is sprayed. The process is particularly suitable for the preparation of dyestuff granules which can easily be dispersed in the use medium.
    Type: Grant
    Filed: September 28, 1987
    Date of Patent: July 11, 1989
    Assignee: Bayer Aktiengesellschaft
    Inventors: Vaclav Kaspar, Manfred Baecker, Horst Brandt, Friedrich Grimmelijkhuizen, Karlheinz Wolf
  • Process for preparing granules of water-insoluble solids
    Patent number: 4527746
    Abstract: Process for preparing granules of water-insoluble solids, characterized in that a non-thixotropic press or filter cake of the solid is comminuted by cutting and the product obtained is dried while in rolling motion in a dryer for pourable solids.
    Type: Grant
    Filed: March 22, 1983
    Date of Patent: July 9, 1985
    Assignee: Bayer Aktiengesellschaft
    Inventors: Hans-Heinz Molls, Vaclav Kaspar, Bernhard Vosteen, Georg Dehmel, Reinhold Hornle, Karlheinz Wolf
  • Phenol-formaldehyde condensates, their preparation and their use as dispersing agents, liquefaction agents and tanning agents
    Patent number: 4325890
    Abstract: Polycondensates of phenols and formaldehyde which contain sulphonic acid groups and salts thereof bonded to the phenol either directly or via a methylene bridge are prepared by reacting a neutralized reaction product of phenols and sulphonating agents, which contains a mixture of the starting phenol, phenolsulphonic acid and bis-(hydroxyphenyl) sulphones, with formaldehyde and a bisulphite at a pH value of 4-8.
    Type: Grant
    Filed: August 8, 1980
    Date of Patent: April 20, 1982
    Assignee: Bayer Aktiengesellschaft
    Inventors: Gunther Reitz, Vaclav Kaspar, Karlhans Jakobs, Kurt Schaupp
  • Thin layer contact drier
    Patent number: 4268972
    Abstract: In an apparatus for drying solutions, dispersions or suspensions, distributor elements are moved by a central rotable installation between parallel planes. As the planes are not perpendicular to the axial shaft, the edges of the distributor elements touch and stroke over the whole surface of the heat exchanger. A self-cleaning effect of the inner surface of the drying apparatus is guaranteed. In a preferred embodiment the distributor elements are cylindrical.
    Type: Grant
    Filed: September 6, 1979
    Date of Patent: May 26, 1981
    Assignee: Bayer Aktiengesellschaft
    Inventors: Hans-Heinz Molls, Vaclav Kaspar, Asterios Moutsokapas
  • Dyestuff formulations containing salts of diaryl ether sulfonic acids
    Patent number: 4217103
    Abstract: Dyestuff formulations which contain anionic, water-soluble dyestuffs or developable dyestuffs and salts of diaryl ether-sulphonic acids are suitable for the preparation of padding liquors, dyebaths and printing pastes.
    Type: Grant
    Filed: September 22, 1978
    Date of Patent: August 12, 1980
    Assignee: Bayer Aktiengesellschaft
    Inventors: Karlheinz Wolf, Hans-Heinz Molls, Reinhard Nebeling, Hans-Werner Petroll, Reinhold Hornle, Richard Schwaebel, Vaclav Kaspar
  • Process and apparatus for spray drying or spray cooling
    Patent number: 4198264
    Abstract: Sifting is improved by the installation of one or more nozzles in the longitudinal axis of a drier. A spray-dried granulate is thereby substantially freed from dust. The effect of heat on low melting products is reduced by cooling the gas.
    Type: Grant
    Filed: October 21, 1977
    Date of Patent: April 15, 1980
    Assignee: Bayer Aktiengesellschaft
    Inventors: Vaclav Kaspar, Hans-Heinz Molls, Reinhold Hornle, Ferdinand Hummes
  • Process for the preparation of improved dyestuff granules from suspension containing a propylene oxide-ethylene oxide copolymer
    Patent number: RE35768
    Abstract: To prepare storage-stable, low-dusting dyestuff granules which are readily soluble in plastics, a suspension of the dyestuff containing 0.1-5% by weight of a polyglycol are dried while being granulated.
    Type: Grant
    Filed: May 25, 1995
    Date of Patent: April 14, 1998
    Assignee: Bayer Aktiengesellschaft
    Inventors: Vaclav Kaspar, Horst Brandt, Gottfried Popp