Patents by Inventor Donald A. Wostratzky

Donald A. Wostratzky 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 photocuring with light emitting diodes
    Publication number: 20050234145
    Abstract: Disclosed is a process for photocuring certain thick layer ethylenically unsaturated systems with a light emitting diode (LED) light source. The thick curable compositions are thick coatings, gel coats, composites and adhesives. The photoinitiator is at least one bisacylphosphine oxide or monoacylphosphine oxide. The process provides for excellent surface cure and through cure.
    Type: Application
    Filed: April 7, 2005
    Publication date: October 20, 2005
    Inventors: Eugene Sitzmann, Donald Wostratzky, Jennifer Jankauskas, Greg Losapio
  • Phosphine oxide photoinitiator systems and curable compositions with low color
    Patent number: 6777459
    Abstract: The present invention relates to a novel photoinitiator system comprising one or more acylphosphine oxide photoinitiators and one or more lightfast red, blue or violet organic pigments. Low yellow color formation results upon curing ethylenically unsaturated compounds with the new photoinitiator system. Particular applications include clear and white coatings, screen inks, gel coats, powder coatings, composites, adhesives and lenses.
    Type: Grant
    Filed: October 3, 2002
    Date of Patent: August 17, 2004
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Walid Al-Akhdar, David Bramer, Eugene Valentine Sitzmann, Jr., Donald A. Wostratzky
  • Novel phosphine oxide photoinitiator systems and curable compostions with low color
    Publication number: 20030119932
    Abstract: The present invention relates to a novel photoinitiator system comprising one or more acylphosphine oxide photoinitiators and one or more lightfast red, blue or violet organic pigments. Low yellow color formation results upon curing ethylenically unsaturated compounds with the new photoinitiator system. Particular applications include clear and white coatings, screen inks, gel coats, powder coatings, composites, adhesives and lenses.
    Type: Application
    Filed: October 3, 2002
    Publication date: June 26, 2003
    Inventors: Walid Al-Akhdar, David Bramer, Eugene Valentine Sitzmann, Donald A. Wostratzky
  • Phosphine oxide photoinitiator systems and curable compositions with low color
    Patent number: 6486226
    Abstract: The present invention relates to a novel photoinitiator system comprising one or more acylphosphine oxide photoinitiators and one or more lightfast red, blue or violet organic pigments. Low yellow color formation results upon curing ethylenically unsaturated compounds with the new photoinitiator system. Particular applications include clear and white coatings, screen inks, gel coats, powder coatings, composites, adhesives and lenses.
    Type: Grant
    Filed: December 5, 2000
    Date of Patent: November 26, 2002
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Walid Al-Akhdar, David Bramer, Eugene Valentine Sitzmann, Jr., Donald A. Wostratzky
  • Novel phosphine oxide photoinitiator systems and curable compositions with low color
    Publication number: 20020107298
    Abstract: The present invention relates to a novel photoinitiator system comprising one or more acylphosphine oxide photoinitiators and one or more lightfast red, blue or violet organic pigments. Low yellow color formation results upon curing ethylenically unsaturated compounds with the new photoinitiator system. Particular applications include clear and white coatings, screen inks, gel coats, powder coatings, composites, adhesives and lenses.
    Type: Application
    Filed: December 5, 2000
    Publication date: August 8, 2002
    Inventors: Walid Al-Akhdar, David Bramer, Eugene Valentine Sitzmann, Donald A. Wostratzky