John D. Spivack
75Patents
15h-index
14Co-inventors
81Inventor score
Filing activity: Nov 23, 1973 → Feb 1, 1993
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4318845A | Alkanolamine esters of 1,1'-biphenyl-2,2'-diyl-and alkylidene-1,1'-biphenyl-2,2'-diyl-cyclic phosphites | Chemistry; Metallurgy | 58 | Expired |
| US4196117A | Alkylated 1,1'-biphenyl-2,2'-diyl phosphites and stabilized compositions | Emerging Cross-Sectional Technologies | 41 | Expired |
| US3944594A | Polyalkylene glycol esters of hindered phenols substituted alkanoic acid | Chemistry; Metallurgy | 38 | Expired |
| US4374219A | Alkanolamine ester of 1,1-biphenyl-2,2-diyl-and alkylidene-1,1-biphenyl-2,2-diyl-cyclic phosphites | Chemistry; Metallurgy | 35 | Expired |
| US4094855A | Hindered phenyl phosphites | Chemistry; Metallurgy | 29 | Expired |
| US4077941A | Metal salts of N,N-disubstituted .beta.-alanines and stabilized compositions | Chemistry; Metallurgy | 29 | Expired |
| US3984460A | Esters of trisubstituted hydroxyphenylalkanoic acids | Chemistry; Metallurgy | 26 | Expired |
| US4351759A | Alkylated 2,2'-biphenylene phosphites and stabilized compositions | Chemistry; Metallurgy | 21 | Expired |
| US4612393A | Bis(substituted thioalkyl)hydroxylamines and stabilized polyolefin compositions | Chemistry; Metallurgy | 20 | Expired |
| US4049713A | Esters and amides of trisubstituted hydroxyphenylalkanoic acids | Chemistry; Metallurgy | 19 | Expired |
| US4207229A | Hindered phenyl phosphites | Chemistry; Metallurgy | 18 | Expired |
| US4143028A | Alkylated 1,1'-biphenyl-2,2'-diyl phosphonites and stabilized compositions | Chemistry; Metallurgy | 17 | Expired |
| US4032562A | 3,5-Dialkyl-4-hydroxyphenylalkanoic acid esters of polyalkylene glycols | Chemistry; Metallurgy | 17 | Expired |
| US4180498A | Hindered phenyl phosphites | Chemistry; Metallurgy | 17 | Expired |
| US4474914A | Ortho-alkylated phenyl phosphonites and stabilized organic compositions | Chemistry; Metallurgy | 17 | Expired |
| US4835202A | (Hydroxyphenyl) phosphine stabilized compositions | Chemistry; Metallurgy | 15 | Expired |
| US4233208A | Polymer compositions stabilized with hindered phenyl secondary phosphites | Chemistry; Metallurgy | 14 | Expired |
| US4692539A | Pentaerythritol diphosphite stabilizers and process | Chemistry; Metallurgy | 13 | Expired |
| US4233207A | Hydrolytically stable ortho-alkylated phenyl phosphonites and stabilized compositions | Chemistry; Metallurgy | 13 | Expired |
| US3962377A | 2,3,5-Trialkyl-4-hydroxybenzylphosphonates and phosphinates | Chemistry; Metallurgy | 13 | Expired |
| US4093587A | Trisubstituted hydroxyphenylalkanoic acid ester and amide stabilized compositions | Chemistry; Metallurgy | 13 | Expired |
| US4185006A | Cyclic phosphonite stabilizers | Chemistry; Metallurgy | 13 | Expired |
| US3935163A | Light stabilized polymer compositions | Chemistry; Metallurgy | 12 | Expired |
| US4406842A | Ortho-alkylated phenyl phosphonites | Chemistry; Metallurgy | 12 | Expired |
| US3988363A | 2,4,6-Trialkyl L-3-hydroxyphenylalkanoates | Chemistry; Metallurgy | 11 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.