Inventor · disambiguated record
Willis T. Schwartz
Also filed as: SCHWARTZ JR WILLIS T · SCHWARTZ WILLIS T · SCHWARTZ WILLIS T JR
29 granted patents·425 citations·filing 1974–1995
97Inventor score
Top patents by PatentIndex Score
29 records- 0191US4870194AProcess for the preparation and recovery of oxdiphthalic anhydridesOCCIDENTAL CHEM CO·Filed 1988·Granted Sep 26, 1989·37 cites·8 claims
- 0289US5021168AProcess for the preparation and recovery of oxydiphthalic anhydridesOCCIDENTAL CHEM CO·Filed 1989·Granted Jun 4, 1991·31 cites·56 claims
- 0384US3983185AHalogen containing polyester resins having improved smoke-resistanceHOOKER CHEMICALS PLASTICS CORP·Filed 1974·Granted Sep 28, 1976·28 cites·46 claims
- 0483US4100229ALow profile additives in polyester systemsHOOKER CHEMICALS PLASTICS CORP·Filed 1977·Granted Jul 11, 1978·26 cites·3 claims
- 0582US4697023AProcess for the preparation of oxy-diphthalic anhydridesOCCIDENTAL CHEM CO·Filed 1986·Granted Sep 29, 1987·18 cites·24 claims
- 0680US4827000AProcess for the preparation of phenoxy phthalic anhydridesOCCIDENTAL CHEM CO·Filed 1987·Granted May 2, 1989·15 cites·39 claims
- 0779US4195014AUnsatured polyester resins having improved fire retardanceHOOKER CHEMICALS PLASTICS CORP·Filed 1977·Granted Mar 25, 1980·22 cites·67 claims
- 0878US4837404AProcess for the preparation of oxy-diphthalic anhydridesOCCIDENTAL CHEM CO·Filed 1987·Granted Jun 6, 1989·13 cites·19 claims
- 0976US5171828ACopolyimide ODPA/BPDA/4,4'-ODA or P-PDAOCCIDENTAL CHEM CO·Filed 1991·Granted Dec 15, 1992·61 cites·24 claims
- 1072US4962206AProcess for the preparation of 4-bromophthalic anhydrideOCCIDENTAL CHEM CO·Filed 1989·Granted Oct 9, 1990·10 cites·10 claims
- 1171US5233049AHighly fluorinated bis-imidesOCCIDENTAL CHEM CO·Filed 1992·Granted Aug 3, 1993·16 cites·1 claims
- 1269US5185451ABis-imides of dioxydiphthalic acidOCCIDENTAL CHEM CO·Filed 1991·Granted Feb 9, 1993·12 cites·20 claims
- 1367US4868316AProcess for the preparation of diether diphthalic anhydridesOCCIDENTAL CHEM CO·Filed 1987·Granted Sep 19, 1989·8 cites·25 claims
- 1465US4447572AFire retardant polyamideOCCIDENTAL CHEM CO·Filed 1981·Granted May 8, 1984·14 cites·20 claims
- 1563US5003086AProcess of preparing dioxydiphthalic anhydrideOCCIDENTAL CHEM CO·Filed 1990·Granted Mar 26, 1991·7 cites·15 claims
- 1663US4152368AUnsaturated polyester resins having improved fire retardanceHOOKER CHEMICALS PLASTICS CORP·Filed 1976·Granted May 1, 1979·11 cites·51 claims
- 1760US5101006APolyimides and copolyimides based on halo-oxydiphthalic anhydridesOCCIDENTAL CHEM CO·Filed 1991·Granted Mar 31, 1992·6 cites·8 claims
- 1860US4943642AHalo-oxydiphthalic anhydridesOCCIDENTAL CHEM CO·Filed 1989·Granted Jul 24, 1990·5 cites·7 claims
- 1958US5077382ACopolyimide odpa/bpda/4,4'-oda or p-pdaOCCIDENTAL CHEM CO·Filed 1989·Granted Dec 31, 1991·25 cites·12 claims
- 2058US4038341ALow profile additives in polyester systemsHOOKER CHEMICALS PLASTICS CORP·Filed 1976·Granted Jul 26, 1977·8 cites·11 claims
- 2157US4148841AHalogen containing polyester resins having improved smoke-retardanceHOOKER CHEMICALS PLASTICS CORP·Filed 1976·Granted Apr 10, 1979·9 cites·45 claims
- 2256US5003031APolyimides and co-polyimides based on dioxydiphthalic anhydrideOCCIDENTAL CHEM CO·Filed 1989·Granted Mar 26, 1991·9 cites·12 claims
- 2355US3992480AFire retardant unsaturated polyestersHOOKER CHEMICALS PLASTICS CORP·Filed 1975·Granted Nov 16, 1976·8 cites·33 claims
- 2453US5166404ADioxydiphthalic acid estersOCCIDENTAL CHEM CO·Filed 1991·Granted Nov 24, 1992·4 cites·1 claims
- 2548US4038342ALow profile additives in polyester systemsHOOKER CHEMICALS PLASTICS CORP·Filed 1976·Granted Jul 26, 1977·8 cites·15 claims
- 2648US4013815AFire retardant unsaturated polyestersHOOKER CHEMICALS PLASTICS CORP·Filed 1975·Granted Mar 22, 1977·10 cites·37 claims
- 2746US4960905APhenoxy phthalic anhydridesOCCIDENTAL CHEM CO·Filed 1988·Granted Oct 2, 1990·2 cites·17 claims
- 2844US5089631ADioxydiphthalic anhydrideOCCIDENTAL CHEM CO·Filed 1990·Granted Feb 18, 1992·2 cites·2 claims
- 2930US5512686AMethod for the purification of dioxydiphthalic anhydride and ester intermediate made thereinOCCIDENTAL CHEM CO·Filed 1995·Granted Apr 30, 1996·0 cites·13 claims
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