P

Inventor

SCHWARTZ WILLIS T

US19 patents

Patents

19 patents
US5171828ADec 15, 1992

Copolyimide ODPA/BPDA/4,4'-ODA or P-PDA

OCCIDENTAL CHEM CO61 citations92
US5021168AJun 4, 1991

Process for the preparation and recovery of oxydiphthalic anhydrides

OCCIDENTAL CHEM CO31 citations90
US4870194ASep 26, 1989

Process for the preparation and recovery of oxdiphthalic anhydrides

OCCIDENTAL CHEM CO37 citations90
US5077382ADec 31, 1991

Copolyimide odpa/bpda/4,4'-oda or p-pda

OCCIDENTAL CHEM CO25 citations89
US4697023ASep 29, 1987

Process for the preparation of oxy-diphthalic anhydrides

OCCIDENTAL CHEM CO18 citations81
US5101006AMar 31, 1992

Polyimides and copolyimides based on halo-oxydiphthalic anhydrides

OCCIDENTAL CHEM CO6 citations73
US5003086AMar 26, 1991

Process of preparing dioxydiphthalic anhydride

OCCIDENTAL CHEM CO7 citations73
US5003031AMar 26, 1991

Polyimides and co-polyimides based on dioxydiphthalic anhydride

OCCIDENTAL CHEM CO9 citations73
US4837404AJun 6, 1989

Process for the preparation of oxy-diphthalic anhydrides

OCCIDENTAL CHEM CO13 citations73
US4827000AMay 2, 1989

Process for the preparation of phenoxy phthalic anhydrides

OCCIDENTAL CHEM CO15 citations73
US5185451AFeb 9, 1993

Bis-imides of dioxydiphthalic acid

OCCIDENTAL CHEM CO12 citations72
US4962206AOct 9, 1990

Process for the preparation of 4-bromophthalic anhydride

OCCIDENTAL CHEM CO10 citations72
US4447572AMay 8, 1984

Fire retardant polyamide

OCCIDENTAL CHEM CO14 citations72
US5233049AAug 3, 1993

Highly fluorinated bis-imides

OCCIDENTAL CHEM CO16 citations67
US5089631AFeb 18, 1992

Dioxydiphthalic anhydride

OCCIDENTAL CHEM CO2 citations62
US4960905AOct 2, 1990

Phenoxy phthalic anhydrides

OCCIDENTAL CHEM CO2 citations62
US4943642AJul 24, 1990

Halo-oxydiphthalic anhydrides

OCCIDENTAL CHEM CO5 citations62
US5166404ANov 24, 1992

Dioxydiphthalic acid esters

OCCIDENTAL CHEM CO4 citations61
US5512686AApr 30, 1996

Method for the purification of dioxydiphthalic anhydride and ester intermediate made therein

OCCIDENTAL CHEM CO0 citations50