EKA CHEMICALS AB
36Patents
2Active
36Granted
38Portfolio score
Filing activity: Feb 20, 1996 → Dec 21, 2004 · 2 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5858174A | Process for the production of paper | Chemistry; Metallurgy | 35 | Expired |
| US5961948A | Method of producing hydrogen peroxide | Chemistry; Metallurgy | 30 | Expired |
| US5842150A | Method of determing the organic content in pulp and paper mill effulents | Physics | 28 | Expired |
| US5846384A | Process for the production of paper | Textiles; Paper | 27 | Expired |
| US6103064A | Process for the production of paper | Textiles; Paper | 26 | Expired |
| US6113741A | Process for the production of paper | Textiles; Paper | 16 | Expired |
| US6087457A | Surface sizing of cellulose based products | Textiles; Paper | 14 | Expired |
| US6100322A | Process for the production of paper | Chemistry; Metallurgy | 14 | Expired |
| US5885953A | Chemical composition | Chemistry; Metallurgy | 12 | Expired |
| US5932000A | Method for preparation of a hardening composition | Chemistry; Metallurgy | 12 | Expired |
| US5929015A | Bleaching agent | Chemistry; Metallurgy | 11 | Expired |
| US5876562A | Sizing dispersions | Textiles; Paper | 11 | Expired |
| US6174383A | Method at treatment of metals | Chemistry; Metallurgy | 10 | Expired |
| US5788815A | Process for the production of paper | Textiles; Paper | 10 | Expired |
| US5902783A | Bleaching agent | Chemistry; Metallurgy | 9 | Expired |
| US5810939A | Method at treatment of metals | Chemistry; Metallurgy | 7 | Expired |
| US5961803A | Leaching process | Chemistry; Metallurgy | 7 | Expired |
| US5846922A | Bleaching agent | Chemistry; Metallurgy | 6 | Expired |
| US5886216A | Method for producing a chemical product | Chemistry; Metallurgy | 5 | Expired |
| US5938894A | Absorbent cellulosic material and production thereof | Textiles; Paper | 5 | Expired |
| US5985235A | Method of treating a catalyst | Emerging Cross-Sectional Technologies | 5 | Expired |
| US5916447A | Method for water treatment | Chemistry; Metallurgy | 3 | Expired |
| US6071431A | Bleaching agent | Chemistry; Metallurgy | 3 | Expired |
| US5792315A | Purifying aqueous effluent from a pulp mill using electro chemical membrane device | Emerging Cross-Sectional Technologies | 3 | Expired |
| US5980717A | Recovery process in a pulp mill | Textiles; Paper | 3 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.