Issued Patents All Time
Showing 1–25 of 40 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5512632 | Thermoplastic blends containing polyesters and polyester carbonates based on substituted cycloalkylidene bisphenols | Dieter Freitag, Ulrich Grigo | 1996-04-30 |
| 5276213 | Special dihydroxydiphenyl bicycloalkanes, their production and their use for the production of high molecular weight polycarbonates | Uwe Westeppe, Gerd Fengler, Manfred Hajek, Carl Casser, Helmut Waldmann | 1994-01-04 |
| 5212280 | Polycarbonate from special dihydroxydiphenyl bicycloalkane | Uwe Westeppe, Gerd Fengler, Manfred Hajek, Carl Casser, Helmut Waldmann | 1993-05-18 |
| 5208127 | Photoconductive recording material with special outermost layer | David R. Terrell, Stefaan De Meutter, Peter Horlacher, Ulrich Grigo | 1993-05-04 |
| 5208128 | Photoconductive recording material with special outermost layer | David R. Terrell, Stefaan De Meutter, Peter Horlacher, Ulrich Grigo | 1993-05-04 |
| 5190817 | Photoconductive recording element | David R. Terrell, Stefaan De Meutter, Ulrich Grigo | 1993-03-02 |
| 5134220 | Polyester and polyester carbonate based on 3,8-dihydroxy-5a, 10b-diphenylcoumarano-2',3',2,3-coumarane | Hans-Josef Buysch, Ulrich Grigo | 1992-07-28 |
| 5126495 | Thermoplastic polyester carbonate-polysiloxane block copolymers | Dietrich Rathmann, Leo Morbitzer, Dieter Freitag, Ulrich Grigo | 1992-06-30 |
| 5068302 | Polysiloxane-polycarbonate block copolymers based on certain dihydroxydiphenylcycloalkanes | Peter Horlacher, Dieter Freitag, Ulrich Grigo, Karsten-Josef Idel, Uwe Westeppe | 1991-11-26 |
| 5041521 | Polyester-carbonate based on 1,1-bis-(4-hydroxyphenyl)-alkylcycloalkanes | Dieter Freitag, Ulrich Grigo, Uwe Westeppe | 1991-08-20 |
| 5037220 | Printing ribbon comprising polycondensates | Bernhard Schulte, Claus Burkhardt, Dieter Freitag, Uwe Hucks, Werner Waldenrath +1 more | 1991-08-06 |
| 5034457 | Thermoplastic blends containing polycarbonates based on substituted cyclohexylidenebisphenols | Dieter Freitag, Karsten-Josef Idel, Ulrich Grigo | 1991-07-23 |
| 5034458 | Polycarbonates of substituted cyclohexylindenebisphenols | Dieter Freitag, Karsten-Josef Idel, Ulrich Grigo | 1991-07-23 |
| 5032661 | Thermoplastic polyester-carbonate/polysiloxane block copolymers | Werner Nouvertne, Ulrich Grigo, Winfried Paul, Dieter Freitag | 1991-07-16 |
| 5021542 | Polycarbonate of polysubstituted cyclohexylidene bisphenols | Dieter Freitag, Karsten-Josef Idel, Uwe Westeppe, Ulrich Grigo, Klaus-Christian Paetz | 1991-06-04 |
| 5010163 | Polycarbonate of cycloalkylidene bisphenol | Dieter Freitag, Uwe Westeppe, Karsten-Josef Idel, Ulrich Grigo, Carl Casser +2 more | 1991-04-23 |
| 5010162 | Polycarbonate of alkyl cyclohexylidene bisphenol | Dieter Freitag, Uwe Westeppe, Karsten-Josef Idel, Ulrich Grigo, Carl Casser +2 more | 1991-04-23 |
| 4902746 | Use of mixtures of polycarbonates and styrene polymers as substrates for optical storage media | Klaus Berg, Ulrich Grigo, Leo Morbitzer, Karl-Erwin Piejko, Klaus Summermann | 1990-02-20 |
| 4797435 | Use of 3-benzalphthalides as UV stabilizers for thermoplastic, aromatic polyesters, polycarbonates and polyester carbonates | Thomas Scholl, Dietrich Rathmann, Ross Savage, Klaus Kircher | 1989-01-10 |
| 4786708 | Use of films of polycondensates | Bernhard Schulte, Claus Burkhardt, Dieter Freitag, Uwe Hucks, Werner Waldenrath +1 more | 1988-11-22 |
| 4746711 | Mixtures of aromatic polycarbonates and aromatic polyester-carbonates, and their use for the production of mouldings, films, fibres, filaments and coatings | Dieter Freitag, Dietrich Rathmann | 1988-05-24 |
| 4714746 | Process for the preparation of aromatic polyester-carbonates having improved notched impact strength, and polyester-carbonates prepared thereby and their use for the production of mouldings, films and coatings | Dieter Freitag, Dietrich Rathmann | 1987-12-22 |
| 4654411 | High molecular weight polyesters, preparation and use thereof | Bernhard Schulte, Werner Waldenrath, Dieter Freitag, Uwe Hucks, Joachim Wank +1 more | 1987-03-31 |
| 4564654 | Process for the preparation and/or further processing of polymer blends | Christian Lindner, Horst Peters, Wolfgang Nising | 1986-01-14 |
| 4515918 | Thermoplastic moulding compositions based on polycarbonate, polyalkylene terephthalate and, optionally, one or more polymers | Werner Nouvertne, Dieter Neuray, Rudolf Binsack, Hans-Georg Gehrke, Dieter Rempel +1 more | 1985-05-07 |