John W. Sparapany
15Patents
9h-index
24Co-inventors
68Inventor score
Filing activity: Dec 19, 1988 → Jan 4, 2002
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5164095A | Dithiocarbamate polymers | Emerging Cross-Sectional Technologies | 59 | Expired |
| US5346627A | Method for removing metals from a fluid stream | Emerging Cross-Sectional Technologies | 48 | Expired |
| US5179173A | Aminoalkylphosphinates and phosphinic acid-containing polymers therefrom | Chemistry; Metallurgy | 37 | Expired |
| US5938937A | Hydrophilic dispersion polymers for treating wastewater | Emerging Cross-Sectional Technologies | 28 | Expired |
| US4921904A | Superabsorbent polymers | Chemistry; Metallurgy | 18 | Expired |
| US6238486A | Detectable cationic flocculant and method of using same in industrial food processes | Physics | 12 | Expired |
| US5338816A | Hydrophobic polyelectrolytes used in removing color | Emerging Cross-Sectional Technologies | 11 | Expired |
| US6398967B2 | Method of clarifying water using low molecular weight cationic dispersion polymers | Chemistry; Metallurgy | 10 | Expired |
| US5283306A | Hydrophobic polyelectrolytes used in removing color | Emerging Cross-Sectional Technologies | 9 | Expired |
| US4868248A | Polyhydroxyamic acid polymers from polyacrylic acids | Chemistry; Metallurgy | 9 | Expired |
| US5093413A | Cationic polymers for sludge dewatering | Chemistry; Metallurgy | 8 | Expired |
| US5143622A | Phosphinic acid-containing polymers and their use in preventing scale and corrosion | Chemistry; Metallurgy | 7 | Expired |
| US5137641A | Cationic polymers for sludge dewatering | Chemistry; Metallurgy | 7 | Expired |
| US6413433B1 | Method for dewatering of sludge | Chemistry; Metallurgy | 6 | Expired |
| US6517677B1 | Method of improving retention and drainage in a papermaking process using low molecular weight cationic dispersion polymers | Chemistry; Metallurgy | 5 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.