Robert O. Keys
24Patents
11h-index
19Co-inventors
72Inventor score
Filing activity: Dec 30, 1982 → Feb 3, 2005
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5759990A | Concentrated fabric softening composition with good freeze/thaw recovery and highly unsaturated fabric softener compound therefor | Chemistry; Metallurgy | 89 | Expired |
| US4589980A | Promoters for froth flotation of coal | Performing Operations; Transporting | 54 | Expired |
| US5674832A | Cationic compositions containing diol and/or diol alkoxylate | Textiles; Paper | 51 | Expired |
| US6211139A | Polyester polyquaternary compounds, compositions containing them, and use thereof | Chemistry; Metallurgy | 47 | Expired |
| US5753079A | Obtaining enhanced paper production using cationic compositions containing diol and/or diol alkoxylate | Textiles; Paper | 43 | Expired |
| US4678562A | Promotors for froth floatation of coal | Performing Operations; Transporting | 37 | Expired |
| US5877145A | Concentrated fabric softening composition with good freeze/thaw recovery and highly unsaturated fabric softener compound therefor | Chemistry; Metallurgy | 35 | Expired |
| US4678561A | Promoters for froth flotation of coal | Performing Operations; Transporting | 24 | Expired |
| US6521589B2 | Quaternary fatty acid triethanolamine ester salts and their use as fabric softeners | Chemistry; Metallurgy | 23 | Expired |
| US4504385A | Ester-alcohol frothers for froth flotation of coal | Performing Operations; Transporting | 15 | Expired |
| US6737392B1 | MDEA ester quats with high content of monoester in blends with tea ester quats | Chemistry; Metallurgy | 13 | Expired |
| US4678563A | Modified alcohol frothers for froth flotation of sulfide ore | Performing Operations; Transporting | 7 | Expired |
| US5686023A | C.sub.7 -C.sub.12 diol and diol alkoxylates as coupling agents for surfactant formulations | Emerging Cross-Sectional Technologies | 6 | Expired |
| US4606818A | Modified alcohol frothers for froth flotation of coal | Performing Operations; Transporting | 6 | Expired |
| US5824635A | Cationic compositions containing hydroxyester | Chemistry; Metallurgy | 4 | Expired |
| US5670472A | Biodegradable ester diquaternary compounds and compositions containing them | Textiles; Paper | 3 | Expired |
| US6162453A | C.sub.7 -C.sub.12 Diol & Diol alkoxylates as coupling agents for surfactant formulations | Emerging Cross-Sectional Technologies | 3 | Expired |
| US6759383B2 | Fabric softening compound | Chemistry; Metallurgy | 3 | Expired |
| US4892663A | Coal filtration process and dewatering aids therefor | Performing Operations; Transporting | 3 | Expired |
| US7015187B2 | Fabric softening compound | Chemistry; Metallurgy | 2 | Expired |
| US5977189A | C.sub.7 -C.sub.12 diol and diol alkoxylates as coupling agents for surfactant formulations | Emerging Cross-Sectional Technologies | 2 | Expired |
| US5958863A | Cationic compositions containing diol alkoxylate | Textiles; Paper | 1 | Expired |
| US5830842A | Hydroxyesters as coupling agents for surfactant formulations | Chemistry; Metallurgy | 1 | Expired |
| US6784152B2 | Polyquat anionic scavengers for rinse cycle fabric softeners | Chemistry; Metallurgy | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.