Issued Patents All Time
Showing 1–17 of 17 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5165970 | Method of coating honeycomb bodies with finely divided solid matter | Felix Schmidt, Wilfried Baumgartner, Gerhard Birtigh, Ewald Dittrich | 1992-11-24 |
| 5127960 | Method for removing washcoat remaining in the channels of freshly coated monolithic or honeycombed catalyst carriers | Ewald Dittrich, Gerhard Birtigh, Felix Schmidt | 1992-07-07 |
| 5077105 | Aluminum oxide tubes | Gunter Frankfurter | 1991-12-31 |
| 5070893 | Apparatus and method for removing washcoat remaining in the channels of freshly coated monolithic or honeycombed catalyst carriers and use of the apparatus | Ewald Dittrich, Gerhard Birtigh, Felix Schmidt | 1991-12-10 |
| 5053279 | Granular bitumen coated with carbon black or silica | Ivo Daniëls, Karl-Hans Mueller, Walter Barthel | 1991-10-01 |
| 4877595 | Method of compressing pyrogenically prepared silicic acid | Reinhard Klingle | 1989-10-31 |
| 4853190 | Process & apparatus for the production of hydrogen cyanide | Hans Schaefer, Carl Voight, Wolf-Dieter Pfeifer | 1989-08-01 |
| 4791082 | Method of making zeolite castings | Jurgen Dorr, Peter Kleinschmit, Reinhard Klingel | 1988-12-13 |
| 4770214 | Process for compacting and/or filling up pulverulent material | Herbert Ginter, Gerhard Dusing, Wolfgang Eckert | 1988-09-13 |
| 4748082 | Zeolite castings | Jurgen Dorr, Peter Kleinschmit, Reinhard Klingel | 1988-05-31 |
| 4680043 | Method for densification of powdery silica and article formed thereby | Herbert Ginter, Reinhard Klingel | 1987-07-14 |
| 4621072 | Process for preparing abrasion-resistant coated catalysts | Dietrich Arntz, Gunter Prescher, Werner Burkhardt, Johannes Heilos | 1986-11-04 |
| 4594234 | Process and apparatus for the production of hydrogen cyanide | Hans Schaefer, Carl Voigt, Wolf-Dieter Pfeifer | 1986-06-10 |
| 4539409 | Process for preparing aromatic nitriles | Dietrich Arntz, Gunter Prescher, Werner Burkhardt, Johannes Heilos | 1985-09-03 |
| 4521618 | Process for preparing acrylic or methacrylic acid | Dietrich Arntz, Gunter Prescher, Werner Burkhardt, Johannes Heilos | 1985-06-04 |
| 4471712 | Apparatus for the internal coating of contact tubes | Carl Voigt, Peter Kleinschmit | 1984-09-18 |
| 4415485 | Process for the internal coating of contact tubes | Carl Voigt, Peter Kleinschmit | 1983-11-15 |