Donnavon D Shaffer

39779912, Aug 31, 1976

Feb 24, 1975

5/552166

Arthur Leo Smith - Lancaster PA
Donnavon David Shaffer - Lititz PA

RCA Corporation - New York NY

C09K 1116

2523014S

Manganese-and-magnesium-coactivated strontium sulfide phosphors are both photoluminescent and cathodoluminescent. The incorporation of small amounts (5 to 1000 ppm) of magnesium into manganese-activated strontium sulfide phosphors shifts the CIE emission color coordinates from about x = 0. 323 and y = 0. 650 for the magnesium-free phoshor to about x = 0. 370 and y = 0. 611, for the maximum amount of incorporated magnesium.

43168167, Feb 23, 1982

Dec 6, 1978

5/967094

Martin R. Royce - Lancaster PA
Donnavon D. Shaffer - Lititz PA

RCA Corporation - New York NY

C09K 1150

2523016S

A method for preparing a phosphor including heating at its reaction temperature in a covered container a mixture of zinc sulfide, an activator quantity of copper as a compound thereof, an activator quantity of aluminum as a compound thereof, an activator quantity of gold as a compound thereof, a minor proportion of elemental selenium, a minor proportion of elemental sulfur and a minor proportion of carbon. The reaction mixture is heated in the container and the product is then cooled. After cooling, whatever carbon remains is removed as by screening.