Issued Patents All Time
Showing 1–20 of 20 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7544233 | Gas chromatograph with a mass spectrometer situated down therefrom, and method for performing the gas chromatographic/mass spectrometric analysis of a substance mixture | Frank Diedrich | 2009-06-09 |
| 6454840 | Separation-column unit for a gas-chromatograph and method for making the same | Udo Gellert, Arno Steckenborn | 2002-09-24 |
| 5379629 | Method and apparatus for regulating the carrier gas pressure for separation column arrangements in gas chromatography | — | 1995-01-10 |
| 5166076 | Device and method for sample dosing in gas chromatography | Fernand Clauss | 1992-11-24 |
| 4888128 | Paper-coating slips containing fluorescent brighteners | Jochen Koll, Werner Bieber, Joachim Konig, Udo Eckstein, Hans Theidel | 1989-12-19 |
| 4877328 | Internal mixer | Klaus Ruthenberg | 1989-10-31 |
| 4481319 | Low-foam surface sizing agents for paper which contain copolymeric _maleic anhydride semi-amides | Gunter Sackmann, Gunter Kolb, Joachim Probst, Heinz Baumgen | 1984-11-06 |
| 4478681 | Forgery-proof paper | Horst Nickel | 1984-10-23 |
| 4418175 | Cationic sizing agents for paper | Joachim Probst, Gunter Kolb, Heinz Baumgen | 1983-11-29 |
| 4385000 | Surface-active phosphonic acid esters | Klaus Walz, Wilfried Nolte | 1983-05-24 |
| 4384110 | Polyamines containing urea groups prepared from lactam or aminocarboxylic acid | Wilfried Lobach, Gunter Kolb, Wolfgang Lehmann, Gunther Cramm, Janos Muszik | 1983-05-17 |
| 4348514 | Polyamines containing urea groups | Wilfried Lobach, Gunter Kolb, Wolfgang Lehmann, Gunther Cramm, Janos Muszik | 1982-09-07 |
| 4333874 | Cationic triazinylamino azo dyestuffs | Horst Nickel, Peter Mummenhoff | 1982-06-08 |
| 4319019 | Polyamines containing amide groups | Wolfgang Lehmann, Gunther Cramn, Knut Hammerstrom, Wilfried Lobach | 1982-03-09 |
| 4282000 | Dyestuff solutions, their preparation and their use for dyeing paper | Manfred Groll | 1981-08-04 |
| 4254255 | Aqueous reaction of polyamine with alkylene dihalide in presence of emulsifier | Wilfried Lobach, Wolfgang Lehmann | 1981-03-03 |
| 4250112 | Polyalkylenepolyamines containing quaternary dialkylammonium groups | Wilfried Lobach, Wolfgang Lehmann | 1981-02-10 |
| 4250298 | Polyamines containing amide groups | Wolfgang Lehmann, Wilfried Lobach, Gunther Cramm, Knut Hammerstrom | 1981-02-10 |
| 4250299 | Polyamines containing amide groups | Wolfgang Lehmann, Gunther Cramm, Knut Hammerstrom, Wilfried Lobach | 1981-02-10 |
| 4198203 | Dyestuff solutions of copper phthalocyanine derivatives for paper dyeing | Manfred Groll | 1980-04-15 |