Seitetsu Kagaku Co., Ltd.
50Patents
0Active
50Granted
37Portfolio score
Filing activity: Dec 6, 1974 → Apr 10, 1991
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4340706A | Alkali metal acrylate or ammonium acrylate polymer excellent in salt solution-absorbency and process for producing same | Chemistry; Metallurgy | 244 | Expired |
| US4541871A | Water-absorbent resin having improved water-absorbency and improved water-dispersibility and process for producing same | Chemistry; Metallurgy | 188 | Expired |
| US4590227A | Water-swellable elastomer composition | Chemistry; Metallurgy | 156 | Expired |
| US4507438A | Water-absorbent resin having improved water-absorbency and improved water-dispersibility and process for producing same | Chemistry; Metallurgy | 149 | Expired |
| US4683274A | Process for producing a water-absorbent resin | Chemistry; Metallurgy | 107 | Expired |
| US4684377A | Process for producing oxygen-enriched gas | Performing Operations; Transporting | 48 | Expired |
| US4661125A | Process for producing high concentration oxygen by a pressure-swing-adsorption method | Performing Operations; Transporting | 35 | Expired |
| US4775394A | Process for separation of high purity gas from mixed gas | Emerging Cross-Sectional Technologies | 33 | Expired |
| US4529412A | Process for obtaining high concentration argon by pressure-swing-adsorption | Performing Operations; Transporting | 32 | Expired |
| US4732968A | Process for granulating a water-absorbent resin employing (a) water (b) inorganic powder & (c) surfactant in an inert solvent | Chemistry; Metallurgy | 31 | Expired |
| US4968787A | Method for treating glycoside | Emerging Cross-Sectional Technologies | 30 | Expired |
| US4599177A | Process for removal of mercury from waste water | Emerging Cross-Sectional Technologies | 28 | Expired |
| US5075373A | Water retention material with water-absorbency | Chemistry; Metallurgy | 27 | Expired |
| US4986835A | Process for separating and recovering carbonic acid gas from gas mixture by adsorption | Emerging Cross-Sectional Technologies | 26 | Expired |
| US4863989A | Water-absorbent resin composition | Chemistry; Metallurgy | 25 | Expired |
| US4726815A | Process for adsorbing and separating carbon dioxide from gas mixture | Emerging Cross-Sectional Technologies | 24 | Expired |
| US4581044A | Process for separating carbonic acid gas from methane-rich gas | Emerging Cross-Sectional Technologies | 24 | Expired |
| US4981699A | Method of preparing an edible composition and product resulting therefrom | Human Necessities | 24 | Expired |
| US4985052A | Process for producing high purity oxygen gas from air | Emerging Cross-Sectional Technologies | 19 | Expired |
| US4972019A | Water-absorbent resin composition | Chemistry; Metallurgy | 16 | Expired |
| US4569909A | Process for preparing uridine diphosphate-N-acetylgalactosamine | Emerging Cross-Sectional Technologies | 14 | Expired |
| US4758616A | Thermoplastic polyester composition for powdered paint | Chemistry; Metallurgy | 13 | Expired |
| US4807615A | Method for anesthetizing aquatic animals | Human Necessities | 12 | Expired |
| US4172912A | Process for adhering polyethylene to steel substrates | Emerging Cross-Sectional Technologies | 9 | Expired |
| US4152296A | Process for preparing catalysts for removal of nitrogen oxides | Performing Operations; Transporting | 9 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.