David J. Tracy
53Patents
13h-index
21Co-inventors
84Inventor score
Filing activity: Nov 15, 1976 → Aug 23, 1999
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5914310A | Amphoteric surfactants having multiple hydrophobic and hydrophilic groups | Chemistry; Metallurgy | 91 | Expired |
| US6204297A | Nonionic gemini surfactants | Emerging Cross-Sectional Technologies | 75 | Expired |
| US5294644A | Surface active lactams | Emerging Cross-Sectional Technologies | 70 | Expired |
| US5093031A | Surface active lactams | Chemistry; Metallurgy | 65 | Expired |
| US5710121A | Anionic surfactants having multiple hydrophobic and hydrophilic groups | Chemistry; Metallurgy | 30 | Expired |
| US5863886A | Nonionic gemini surfactants having multiple hydrophobic and hydrophilic sugar groups | Chemistry; Metallurgy | 25 | Expired |
| US5643864A | Anionic surfactants having multiple hydrophobic and hydrophilic groups | Chemistry; Metallurgy | 24 | Expired |
| US5643498A | Quaternary cationic surfactants having multiple hydrophobic and hydrophilic groups | Chemistry; Metallurgy | 23 | Expired |
| US5789371A | Amphoteric surfactants having multiple hydrophobic and hydrophilic groups | Chemistry; Metallurgy | 20 | Expired |
| US5952290A | Anionic gemini surfactants and methods for their preparation | Chemistry; Metallurgy | 17 | Expired |
| US4732990A | Quaternized nitrogen containing compounds | Human Necessities | 15 | Expired |
| US5656586A | Amphoteric surfactants having multiple hydrophobic and hydrophilic groups | Chemistry; Metallurgy | 15 | Expired |
| US4883655A | Quaternized nitrogen containing polycyclic compounds | Human Necessities | 14 | Expired |
| US4885371A | Process for the preparation of purified N-alkyl lactams | Chemistry; Metallurgy | 13 | Expired |
| US4259474A | Sulfur-containing polyoxyalkylenes | Emerging Cross-Sectional Technologies | 10 | Expired |
| US4806609A | Pyrrolidonyl acrylate block polymers | Chemistry; Metallurgy | 10 | Expired |
| US4801400A | Epoxy pyrrolidone based non-ionic surfactants | Emerging Cross-Sectional Technologies | 9 | Expired |
| US4760152A | Pyrrolidonyl acrylate block polymers | Emerging Cross-Sectional Technologies | 9 | Expired |
| US5300665A | Process for preparing fatty acid esters and amides of sulfonic acid salts | Chemistry; Metallurgy | 9 | Expired |
| US5783554A | Cleaning compositions containing anionic surfactants having multiple hydrophobic and hydrophilic groups | Chemistry; Metallurgy | 9 | Expired |
| US5922671A | Anionic surfactants having multiple hydrophobic and hydrophilic groups | Chemistry; Metallurgy | 9 | Expired |
| US5811384A | Nonionic gemini surfactants | Chemistry; Metallurgy | 8 | Expired |
| US5846926A | Nonionic gemini surfactants with three hydrophilic heads and two lipophilic tails | Chemistry; Metallurgy | 8 | Expired |
| US5744063A | Higher purity imidazoline based amphoacetate surfactants and processes for the preparation thereof | Emerging Cross-Sectional Technologies | 7 | Expired |
| US4830851A | Polymeric halophors | Chemistry; Metallurgy | 7 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.