Charles F Chenot, Age 85364 Aspenwood Rd, Towanda, PA 18848

7014793, Mar 21, 2006

Aug 19, 2005

11/208283

Charles F. Chenot - Towanda PA, US
Fuquiang Huang - Towanda PA, US

OSRAM SYLVANIA Inc. - Danvers MA

C09K 11/56
C09K 11/54

2523016S

A method of making zinc sulfide based electroluminescent phosphors is described wherein a first-fired zinc sulfide material having a hexagonal β-ZnS crystal structure is at least partially converted to a distorted hexagonal β-ZnS crystal structure by ultrasonic irradiation. The first-fired material is then fired at a lower temperature to form an electroluminescent phosphor.

2004000, Jan 15, 2004

May 9, 2003

10/435438

Charles Chenot - Towanda PA, US
Fuquiang Huang - Towanda PA, US

C09K011/56
C09K011/54

252/30160S

A method of making zinc sulfide based electroluminescent phosphors is described wherein a first-fired zinc sulfide material having a hexagonal -ZnS crystal structure is at least partially converted to a distorted hexagonal -ZnS crystal structure by ultrasonic irradiation. The first-fired material is then fired at a lower temperature to form an electroluminescent phosphor.

5985175, Nov 16, 1999

Aug 19, 1998

9/136782

Chen-Wen Fan - Sayre PA
Dale E. Benjamin - Athens PA
Franz Kummer - Munchen, DE
Charles F. Chenot - Towanda PA
Richard G. W. Gingerich - Towanda PA

Osram Sylvania Inc. - Danvers MA

C09K 1102
C23C 410
C23C 1640
B05D 1902
B05D 1522

2523014R

A method for forming a continuous, conformal non-particulate coating of boron oxide on individual phosphor particles is provided. The method involves reacting a boron-containing precursor with an oxidizing gas in a fluidized bed of phosphor particles. The boron oxide coated phosphor exhibits an increased quantum efficiency under ultraviolet (UV) and vacuum ultraviolet (VUV) excitation.

5068055, Nov 26, 1991

Feb 25, 1991

7/659489

Charles F. Chenot - Towanda PA
Michael A. Krebs - Waverly NY

GTE Products Corporation - Stamford CT

C09K 1163

2523014R

A europium activated strontium tetraborate UV emitting phosphor is disclosed having a weight composition of from about 34. 72% to about 35. 80 strontium %, from about 17. 66% to about 17. 78 boron %, from about 0. 37% to about 1. 86% europium, and the balance oxygen. The phosphor has essentially elongated prism-like particles with the europium relatively uniformly distributed throughout the balance of the phosphor and with the particle size distribution being characterized by the 50% size being in the range of from about 7 micrometers to about 12 micrometers as determined by Coulter Counter measurement and with less than about 12% by weight of the particles having a particle size of greater than about 16 micrometers as determined by Coulter Counter measurement. The process for making the phosphor is disclosed which involves forming a mixture of strontium carbonate and europium carbonate in an aqueous solution of boric acid at a temperature of at least about 70. degree. C. with the mole ratio of SrCO. sub. 3 to H. sub. 3 BO. sub.

5196234, Mar 23, 1993

Jul 20, 1992

7/917724

Fred R. Taubner - Danvers MA
A. Gary Sigai - Lexington MA
Charles F. Chenot - Towanda PA
Henry B. Minnier - Dushore PA

GTE Products Corporation - Danvers MA

C09K 1159

427213

A method for preparing a specific zinc orthosilicate phosphor particle having a nonparticulate, conformal aluminum oxide coating wherein all of a manganese activator is present as manganese (II) and occupies zinc (II) sites includes the steps of blending a zinc source, a manganese (II) source, a silicon source, and a tungsten source in amounts in accordance with said formula with an amount of up to about 2 weight percent NH. sub. 4 Cl and up to about 0. 2 weight percent NH. sub. 4 F to form a relatively uniform admixture, firing the mixture in a closed container under an inert non-oxidizing atmosphere to promote retention of manganese in the plus two valance state whereby oxidation of manganese to a higher valence state is avoided and conditions promote larger particle size formation; milling and washing the phosphor in an aqueous citric acid solution to remove unreacted manganese; rinsing, drying and sieving the dried phosphor; and depositing a continuous, nonparticulate, conformal aluminum oxide coating on the dried phosphor particle.

4426600, Jan 17, 1984

Jun 22, 1979

6/051303

Charles F. Chenot - Towanda PA
Wolfgang Walter - Brookline MA

GTE Products Corporation - Stamford CT

H01J 6144

313487

A fluorescent lamps having colors similar to standard white can be prepared using two phosphor compositions. A blue emitting phosphor having a peak emission with a specified range and a 50% band width within a specified range is used with specific amounts of a yellow-emitting phosphor having a 50% band width within a specified range and a peak emission within a specified range provide a lamp having the same chromaticity as a standard white lamp with a higher lumer per watt than the standard white lamp. In one embodiment the blue emitting component has a second specific peak emission and a specific 50% bandwidth.

3962118, Jun 8, 1976

Feb 5, 1973

5/329651

Charles F. Chenot - Towanda PA

GTE Sylvania Incorporated - Stamford CT

C09K 1126
C09K 1130
C09K 1112
C09K 1116

2523014R

Increased luminescence intensity in magnesium aluminum gallate phosphors as well as magnesium gallate phosphors is achieved by utilizing a fluorine source in the raw material mix and by conducting initial processing in a humid, oxidizing atmosphere. Additionally, processing time is drastically reduced.

5676917, Oct 14, 1997

Sep 20, 1996

8/717056

Leslie F. Trudeau - Waverly NY
Charles F. Chenot - Towanda PA
Richard G. W. Gingerich - Towanda PA

Osram Sylvania Inc. - Danvers MA

C01B 2542

423305

A fine, largely beta phase calcium pyrophosphate powder for, e. g. , a diffuser coating for the interior surface of lamp envelopes. The powder is useful for electrostatic deposition of such coatings under varying conditions of environmental humidity. A process for the synthesis of the calcium pyrophosphate is also disclosed. Dibasic calcium orthophosphate (monetite) is dissolved in a dilute aqueous hydrochloric acid solution and spray-dried to form a calcium phosphate powder of spherically shaped hollow particles. The calcium phosphate powder is fired in air to convert the calcium phosphate powder to a spherical calcium pyrophosphate powder including the beta phase as a major component and the gamma phase as a minor component. For a diffuser coating, the poder is sonicated to fragment a portion of the hollow particles.