Hoechst Celanese Corporation
1,206Patents
2Active
1,206Granted
47Portfolio score
Filing activity: Feb 1, 1982 → Oct 4, 1999
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5144068A | Methanol carbonylation process | Chemistry; Metallurgy | 275 | Expired |
| US5001259A | Methanol carbonylation process | Chemistry; Metallurgy | 254 | Expired |
| US5026908A | Methanol carbonylation process | Chemistry; Metallurgy | 227 | Expired |
| US5486410A | Fibrous structures containing immobilized particulate matter | Emerging Cross-Sectional Technologies | 180 | Expired |
| US5731062A | Thermoplastic three-dimensional fiber network | Emerging Cross-Sectional Technologies | 177 | Expired |
| US4994608A | Addition of hydrogen to carbon monoxide feed gas in producing acetic acid by carbonylation of methanol | Chemistry; Metallurgy | 171 | Expired |
| US5145906A | Super-absorbent polymer having improved absorbency properties | Chemistry; Metallurgy | 163 | Expired |
| US5599976A | Recovery of acetic acid from dilute aqueous streams formed during a carbonylation process | Emerging Cross-Sectional Technologies | 160 | Expired |
| US5580459A | Filtration structures of wet laid, bicomponent fiber | Emerging Cross-Sectional Technologies | 143 | Expired |
| US5597873A | Superabsorbent polymers and products therefrom | Chemistry; Metallurgy | 131 | Expired |
| US4927736A | Hydroxy polyimides and high temperature positive photoresists therefrom | Physics | 124 | Expired |
| US5167765A | Wet laid bonded fibrous web containing bicomponent fibers including LLDPE | Textiles; Paper | 114 | Expired |
| US5833321A | Vehicle seat having high air circulation and materials used therein | Textiles; Paper | 112 | Expired |
| US5002986A | Fluid absorbent compositions and process for their preparation | Human Necessities | 107 | Expired |
| US5605746A | Fibrous structures containing particulate and including microfiber web | Emerging Cross-Sectional Technologies | 102 | Expired |
| US5662728A | Particulate filter structure | Emerging Cross-Sectional Technologies | 99 | Expired |
| US4983730A | Water soluble cellulose acetate composition having improved processability and tensile properties | Chemistry; Metallurgy | 96 | Expired |
| US5049275A | Modified microporous structures | Emerging Cross-Sectional Technologies | 91 | Expired |
| US5160627A | Process for making microporous membranes having gel-filled pores, and separations methods using such membranes | Emerging Cross-Sectional Technologies | 90 | Expired |
| US5340909A | Poly(1,3-propylene terephthalate) | Chemistry; Metallurgy | 83 | Expired |
| US5286280A | Composite gas separation membrane having a gutter layer comprising a crosslinked polar phenyl-containing - organopolysiloxane, and method for making the same - | Performing Operations; Transporting | 82 | Expired |
| US5896680A | Shoes comprising three-dimensional formed fiber product | Performing Operations; Transporting | 81 | Expired |
| US5190182A | Slide gate | Performing Operations; Transporting | 80 | Expired |
| US5731252A | Process for improving productivity of a carbonylation catalyst solution by removing corrosion metals | Emerging Cross-Sectional Technologies | 77 | Expired |
| US5972477A | Laminated fiber networks | Emerging Cross-Sectional Technologies | 77 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.