NATIONAL PATENT DEVELOPMENT CORPORATION Trademarks
HYDRON
Filed: May 8, 1937
DYES AND DYESTUFFS
Owned by: NATIONAL PATENT DEVELOPMENT CORPORATION
Serial Number: 71392483
SPHERON
Filed: June 11, 1976
CHROMATOGRAPHY PACKING MATERIAL, POLYMERIC SUPPORT FOR CATALYSTS, POLYMERIC ADSORPTION MATRIX, AND ION-EXCHANGE POLYMERS
Owned by: NATIONAL PATENT DEVELOPMENT CORPORATION
Serial Number: 73090121
GRAF-OUT
Owned by: NATIONAL PATENT DEVELOPMENT CORPORATION
Serial Number: 81033536
FREE 'N CLEAR
Owned by: NATIONAL PATENT DEVELOPMENT CORPORATION
Serial Number: 81039024
