ROBERT G CLARK
Broker in Brockton, MA
License number
Massachusetts 13717
Issued Date
Jan 1, 1960
Expiration Date
Apr 30, 2008
Type
Broker
Address
Address
Brockton, MA 02301
Professional information
Moisture Insensitive Electroluminescent Phosphor
US Patent:
6456002, Sep 24, 2002
Filed:
Mar 29, 1999
Appl. No.:
09/277875
Inventors:
Keith A. Klinedinst - Hudson MA
Robert F. Clark - Brockton MA
Robert F. Clark - Brockton MA
Assignee:
Osram Sylvania Inc. - Danvers MA
International Classification:
H01J 162
US Classification:
313503, 313483, 313502, 427212, 427213, 427 70, 428404, 428403, 428698, 428704
Abstract:
A phosphor particle has thereon a moisture resistant treatment of a metallic nitride. By moisture resistant is meant a condition allowing the phosphor particle to function in a humid atmosphere for a significantly longer period of time than an untreated particle. The method of making such phosphors comprises the steps of introducing an inert gas into a reaction vessel; charging phosphor particles into the reaction vessel; heating the reaction vessel to a reaction temperature; introducing a nitride coating precursor into the reaction vessel; introducing a co-reactant into the reaction vessel; and maintaining the inert gas flow, co-reactant flow and precursor supply for a time sufficient to moisture-proof the phosphor particles. The nitride treated phosphor particles produced by this method, which can include the deposition of a nitride coating on the particles, have excellent efficacy ratings and strong luminance values in lamps after 100 hours use in high humidity (i. e. , 95%).
Moisture Insensitive Electroluminescent Phosphor
US Patent:
6509058, Jan 21, 2003
Filed:
May 18, 2001
Appl. No.:
09/861190
Inventors:
Keith A. Klinedinst - Hudson MA
Robert F. Clark - Brockton MA
Robert F. Clark - Brockton MA
Assignee:
Osram Sylvania Inc. - Danvers MA
International Classification:
C23C 1406
US Classification:
427213, 427212, 427215, 428403
Abstract:
A phosphor particle has thereon a moisture resistant treatment of a metallic nitride. By moisture resistant is meant a condition allowing the phosphor particle to function in a humid atmosphere for a significantly longer period of time than an untreated particle. The method of making such phosphors comprises the steps of introducing an inert gas into a reaction vessel; charging phosphor particles into the reaction vessel; heating the reaction vessel to a reaction temperature; introducing a nitride coating precursor into the reaction vessel; introducing a co-reactant into the reaction vessel; and maintaining the inert gas flow, co-reactant flow and precursor supply for a time sufficient to moisture-proof the phosphor particles. The nitride treated phosphor particles produced by this method, which can include the deposition of a nitride coating on the particles, have excellent efficacy ratings and strong luminance values in lamps after 100 hours use in high humidity (i. e. , 95%).
Nitride Coated Particle And Composition Of Matter Comprised Of Such Particles
US Patent:
6064150, May 16, 2000
Filed:
Oct 20, 1998
Appl. No.:
9/175787
Inventors:
Keith A. Klinedinst - Hudson MA
Robert F. Clark - Brockton MA
Robert F. Clark - Brockton MA
Assignee:
Osram Sylvania Inc. - Danvers MA
International Classification:
H01J 162
US Classification:
313503
Abstract:
A phosphor particle having thereon a conformal coating of aluminum nitride. By conformal coating is meant a coating that follows the surface contours of the individual particles. The method of making such phosphors comprises the steps of introducing an inert gas into a reaction vessel; charging phosphor particles into the reaction vessel; heating the reaction vessel to a reaction temperature; introducing a nitride coating precursor into the reaction vessel; introducing a coreactant into the reaction vessel; and maintaining the inert gas flow, coreactant flow and precursor supply for a time sufficient to coat the phosphor particles. The nitride coated phosphor particles produced by this method have excellent efficacy ratings and strong luminance values in lamps after 100 hours use in high humidity (i. e. ,>95%).