Patents by Inventor Willy P. Schreurs

Willy P. Schreurs 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).

  • Method of providing a universal coating for fluorescent lamps
    Patent number: 4340512
    Abstract: A method of preparing phosphor suspensions for coating fluorescent lamps wherein the temporary organic binder is an association compound of purified carboxy methyl cellulose and polyethylene oxide in such proportions as to avoid the gelation caused by ionizable phosphors releasing multivalent cations.
    Type: Grant
    Filed: October 1, 1979
    Date of Patent: July 20, 1982
    Assignee: North American Philips Corporation
    Inventor: Willy P. Schreurs
  • Reflector coating composition for fluorescent lamps
    Patent number: 4308186
    Abstract: An essentially water-base coating to form reflective films on the inner wall of fluorescent lamps is prepared from a dispersion of TiO.sub.2 in a vehicle comprising a water solution of an organic binder, a volatile organic non-solvent of the binder at room temperature and additions of cationic and nonionic surfactants.
    Type: Grant
    Filed: July 7, 1980
    Date of Patent: December 29, 1981
    Assignee: North American Philips Corporation
    Inventors: Willy P. Schreurs, Liviu Magian
  • Fluorescent lamp with a low reflectivity protective film of aluminum oxide
    Patent number: 4289991
    Abstract: The light output and lumen maintenance of fluorescent lamps with or without a conductive film, are improved by coating the glass envelope or the conductive glass envelope with a thin transparent film of Al.sub.2 O.sub.3.The alumina film is obtained from a coating of a binderless suspension of submicron size Al.sub.2 O.sub.3 particles in lightly acidified water and has a thickness of 20 to 80 nanometers.
    Type: Grant
    Filed: September 6, 1977
    Date of Patent: September 15, 1981
    Assignee: GTE Products Corporation
    Inventor: Willy P. Schreurs
  • Method of coating arc discharge lamp electrode
    Patent number: 4251569
    Abstract: An arc discharge lamp electrode is coated by applying thereto a suspension of alkaline earth compounds in a liquid vehicle of lignosulfonic acid, ammonia and ethylene glycol.
    Type: Grant
    Filed: October 22, 1975
    Date of Patent: February 17, 1981
    Assignee: GTE Products Corporation
    Inventors: Eric L. Mager, Willy P. Schreurs
  • Method of making fluorescent lamp
    Patent number: 4148935
    Abstract: A coating is deposited on the inner wall of a fluorescent lamp bulb from a suspension of particulate matter in a liquid vehicle of polyoxyethylene, hydroxyethylmethyl cellulose and an insolubilizing agent dissolved in water. After drying and low temperature heating to insolubilize the coating, another coating is deposited thereover from a similar aqueous vehicle.
    Type: Grant
    Filed: November 30, 1977
    Date of Patent: April 10, 1979
    Assignee: GTE Sylvania Incorporated
    Inventor: Willy P. Schreurs
  • Method of improving the output and maintenance of a fluorescent lamp
    Patent number: 4147816
    Abstract: In the manufacture of a fluorescent lamp having lead activated barium mesosilicate phosphor coated on the inner wall of the lamp envelope, ammonium chloride or other heat decomposable chlorides are added to the phosphor coating suspension in order to improve the initial output and the maintenance of the lamp.
    Type: Grant
    Filed: April 7, 1977
    Date of Patent: April 3, 1979
    Assignee: GTE Sylvania Incorporated
    Inventor: Willy P. Schreurs
  • Fluorescent lamp having zero back brightness
    Patent number: 4061946
    Abstract: In a directional fluorescent lamp having a reflector layer between the phosphor and the glass envelope wall, there is a dark, nonreflecting, light-absorbing layer between the reflector layer and the glass to prevent light escaping from the back of the lamp.
    Type: Grant
    Filed: October 6, 1975
    Date of Patent: December 6, 1977
    Assignee: GTE Sylvania Incorporated
    Inventor: Willy P. Schreurs
  • Method of making fluorescent lamp
    Patent number: 4058639
    Abstract: A film of colloidal alumina is deposited on a fluorescent lamp envelope from a suspension containing nitrocellulose resin. After the film has dried, a phoshor coating is deposited thereon without the need of baking the film.
    Type: Grant
    Filed: December 9, 1975
    Date of Patent: November 15, 1977
    Assignee: GTE Sylvania Incorporated
    Inventor: Willy P. Schreurs
  • Special purpose fluorescent lamp
    Patent number: 4055781
    Abstract: A fluorescent lamp which enhances the colors blue and red while maintaining an acceptable overall color rendition contains a four component phosphor blend comprising three broad band emitting phosphors and a narror band emitting phosphor which peaks in the deep red region of the visible spectrum.
    Type: Grant
    Filed: September 9, 1974
    Date of Patent: October 25, 1977
    Assignee: GTE Sylvania Incorporated
    Inventor: Willy P. Schreurs
  • Ultraviolet emitting fluorescent lamp having internal reflector film
    Patent number: 3987331
    Abstract: An ultraviolet emitting fluorescent lamp contains an internal reflector film to increase the forward flux of the lamp. The reflector film comprises a layer of zirconia on the inside glass wall of the lamp envelope.
    Type: Grant
    Filed: March 24, 1975
    Date of Patent: October 19, 1976
    Assignee: GTE Sylvania Incorporated
    Inventor: Willy P. Schreurs