Harold Heller
18Patents
7h-index
21Co-inventors
66Inventor score
Filing activity: Dec 26, 1973 → May 18, 1995
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4483716A | Poultice method for extracting hazardous spills | Emerging Cross-Sectional Technologies | 25 | Expired |
| US3994719A | Resins for separating heavy metals consisting of thiourea-group-containing macroporous vinyl aromatic crosslinked matrixes | Chemistry; Metallurgy | 23 | Expired |
| US4402725A | Fertilizers | Emerging Cross-Sectional Technologies | 16 | Expired |
| US4469502A | Ion exchanger fertilizers and a process for supplying plants with nutrients uniformly and over a long period of time | Chemistry; Metallurgy | 14 | Expired |
| US5441646A | Process of removing sulfate ions from water with a poly(meth)acrylamide exchange resin | Chemistry; Metallurgy | 10 | Expired |
| US5175193A | Process for the preparation of weakly acid cation exchange resins | Chemistry; Metallurgy | 8 | Expired |
| US4319015A | Synthetic resins based on crosslinked copolymers of monovinyl and polyvinyl compounds | Emerging Cross-Sectional Technologies | 8 | Expired |
| US4077918A | Process for the preparation of anion exchangers by aminoalkylation of crosslinked aromatic polymer using sulphur trioxide catalyst | Chemistry; Metallurgy | 7 | Expired |
| US4396412A | Ion exchanger fertilizers | Emerging Cross-Sectional Technologies | 7 | Expired |
| US3961105A | Method for the manufacture of coated calcium sulfate whisker fibers | Emerging Cross-Sectional Technologies | 7 | Expired |
| US4705637A | Process for reducing the wash water requirement of weakly basic anion exchangers | Performing Operations; Transporting | 6 | Expired |
| US3980462A | Fertilizer for long term supply of plants with chelated micronutrients | Emerging Cross-Sectional Technologies | 6 | Expired |
| US5414020A | Process for the preparation of anion exchange resins of the poly(meth)acrylamide type | Chemistry; Metallurgy | 5 | Expired |
| US4025705A | Insoluble adsorber resin suitable for treating drinking water and sewage | Emerging Cross-Sectional Technologies | 4 | Expired |
| US4083712A | Nitrogenous fertilizer compositions | Chemistry; Metallurgy | 4 | Expired |
| US4115261A | Process for treating drinking water and sewage | Emerging Cross-Sectional Technologies | 4 | Expired |
| US4988738A | Process for the preparation of bifunctional anion exchange resins, new bifunctional anion exchange resins and use thereof | Performing Operations; Transporting | 3 | Expired |
| US5612383A | Weakly basic anion exchangers, processes for their preparation by aminolysis and their use for removing sulphate ions from aqueous liquids | Chemistry; Metallurgy | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.