LENZING AKTIENGESELLSCHAFT
190Patents
81Active
190Granted
50Portfolio score
Filing activity: Oct 12, 1984 → Dec 2, 2022 · 13 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5589125A | Process of and apparatus for making cellulose mouldings | Chemistry; Metallurgy | 54 | Expired |
| US5094690A | Process and arrangement for preparing a solution of cellulose | Chemistry; Metallurgy | 50 | Expired |
| US5679146A | Moulding materials and spinning materials containing cellulose | Textiles; Paper | 47 | Expired |
| US5252284A | Method of producing shaped cellulosic articles | Textiles; Paper | 42 | Expired |
| US5167890A | Monoaxially stretched shaped article of polytetrafluoroethylene and process for producing the same | Chemistry; Metallurgy | 41 | Expired |
| US5676795A | Process for the production of viscose pulp | Textiles; Paper | 38 | Expired |
| US5164079A | Filtering apparatus for separating solid and suspended matter from a liquid | Performing Operations; Transporting | 36 | Expired |
| US5330567A | Process and arrangement for preparing a solution of cellulose | Chemistry; Metallurgy | 35 | Expired |
| US5607639A | Process for the preparation of cellulose sheet | Chemistry; Metallurgy | 35 | Expired |
| US5626810A | Process for the preparation of cellulose solutions | Chemistry; Metallurgy | 33 | Expired |
| US5601767A | Process for the production of a cellulose moulded body | Textiles; Paper | 33 | Expired |
| US5216144A | Method of producing shaped cellulosic articles | Chemistry; Metallurgy | 28 | Expired |
| US5795522A | Cellulose fibre | Chemistry; Metallurgy | 27 | Expired |
| US5346588A | Process for the chlorine-free bleaching of cellulosic materials with ozone | Textiles; Paper | 27 | Expired |
| US5284540A | Method of making laminates from polyethylene foils and the like | Emerging Cross-Sectional Technologies | 25 | Expired |
| US5409532A | Amine-oxides | Chemistry; Metallurgy | 25 | Expired |
| US5628941A | Process for the production of cellulose moulded bodies | Chemistry; Metallurgy | 24 | Expired |
| US5603883A | Process of and apparatus for making celluose products | Emerging Cross-Sectional Technologies | 23 | Expired |
| US5656224A | Process for the production of a cellulose suspension | Chemistry; Metallurgy | 23 | Expired |
| US5543101A | Process of making cellulose fibres | Textiles; Paper | 21 | Expired |
| US5189152A | Cellulose solution in water and NMMO | Chemistry; Metallurgy | 21 | Expired |
| US5348761A | Use of a swellable plastic and process for making a resistive moisture sensor | Emerging Cross-Sectional Technologies | 21 | Expired |
| US5453194A | Back-flushing filter device for the filtration of highly viscous liquids | Performing Operations; Transporting | 20 | Expired |
| US5601771A | Process for the production of cellulose fibres | Textiles; Paper | 20 | Expired |
| US5662858A | Process for the production of cellulose fibres having a reduced tendency to fibrillation | Textiles; Paper | 19 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.