Patents by Inventor Peter Rohringer
Peter Rohringer has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
-
Patent number: 6464735Abstract: The present invention provides new compounds having the formula: in which X is O or, preferably, NH; M is hydrogen, an alkali metal atom, ammonium or a cation formed from an amine; each R1, independently, is an aminoacid residue from which a hydrogen atom on the amino group has been removed; n is 1 or 2; and each R2, independently, is hydrogen, C1-C3alkyl, halogen, cyano, COOR in which R is hydrogen or C1-C3alkyl, CONH—R in which R has its previous significance, SO2NH—R in which R has its previous significance, NH—COR in which R has its previous significance, SO3M in which M has its previous significance or, when n is 1, R2 can also be CO—R3 in which R3 is C1-C3alkyl or phenyl; provided that those compounds are excluded in which a) X is NH, n is 1 and R2 is SO3M in which M has its previous significance; or b) X is NH, n is 2 and one R2 is SO3M in which M has its previous significance, and the other R2 is hydrogen, methyl or halogen; or c) X is NH, n is 1, R1 is glType: GrantFiled: January 22, 2001Date of Patent: October 15, 2002Assignee: Ciba Specialty Chemicals CorporationInventors: Peter Rohringer, Georges Metzger, Dieter Reinehr
-
Patent number: 6464832Abstract: A simplified method for the optical brightening of paper either in the pulp mass, the size or metering press or by coating by the use of a formulation of an optical brightening agent together with a swellable layered silicate.Type: GrantFiled: September 10, 2001Date of Patent: October 15, 2002Assignee: Ciba Specialty Chemicals CorporationInventors: Thomas Engelhardt, Peter Rohringer
-
Patent number: 6458169Abstract: The present invention provides new compounds having the formula: in which X is O or, preferably, NH; M is hydrogen, an alkali metal atom, ammonium or a cation formed from an amine; each R1, independently, is an aminoacid residue from which a hydrogen atom on the amino group has been removed; n is 1 or 2; and each R2, independently, is hydrogen, C1-C3alkyl, halogen, cyano, COOR in which R is hydrogen or C1-C3alkyl, CONH—R in which R has its previous significance, SO2NH—R in which R has its previous significance, NH—COR in which R has its previous significance, SO3M in which M has its previous significance or, when n is 1, R2 can also be CO—R3 in which R3 is C1-C3alkyl or phenyl; provided that those compounds are excluded in which a) X is NH, n is 1 and R2 is SO3M in which M has its previous significance; or b) X is NH, n is 2 and one R2 is SO3M in which M has its previous significance, and the other R2 is hydrogen, methyl or halogen; or c) X is NH, n is 1, R1 is glType: GrantFiled: January 22, 2001Date of Patent: October 1, 2002Assignee: Ciba Specialty Chemicals CorporationInventors: Peter Rohringer, Georges Metzger, Dieter Reinehr
-
Publication number: 20020084049Abstract: A simplified method for the optical brightening of paper either in the pulp mass, the size or metering press or by coating by the use of a formulation of an optical brightening agent together with a swellable layered silicate.Type: ApplicationFiled: September 10, 2001Publication date: July 4, 2002Inventors: Thomas Engelhardt, Peter Rohringer
-
Patent number: 6365737Abstract: A process for the preparation of a 4,4′-bis-(triazinylamino)-stilbene-2,2′-disulphonic acid compound of formula (1) is disclosed, characterized in that (a) in a first reaction step cyanurchloride is reacted with the disodium salt of 4,4′-diaminostilbene-2,2′-disulfonic acid to give the intermediate of formula (2); (b) in a second reaction step the compound of formula (2) is reacted with a compound of formula R1—H and/or R2—H to give the compound of formula (3); (c) in a third step the compound of formula (3) is reacted with the compound of the formula R3H, and reaction step (a) and/or (c) are carried out in a medium consisting of a mixture of water and a polyglycol to give the compound of formula (1), wherein R1, R2 and R3, independently, are phenylamino; phenylamino substitued by C1-C3alkyl, halogen, cyano, COOR or COR; CONH—R; SO2NH—R; NH—COR; mono- or disulphonated phenylamino; morpholino; piperidino; pyrrolidino; —NH2; —NHType: GrantFiled: August 17, 2000Date of Patent: April 2, 2002Assignee: Ciba Specialty Chemical CorporationInventors: Georges Metzger, Fabienne Cuesta, Peter Rohringer, Dieter Reinehr, René Schlatter
-
Publication number: 20020017001Abstract: The present invention provides new compounds having the formula: 1Type: ApplicationFiled: January 22, 2001Publication date: February 14, 2002Inventors: Peter Rohringer, George Metzger, Dieter Reinehr
-
Patent number: 6331626Abstract: The present invention provides a hydrate of the 4,4′-di-triazinylamino-2,2′-di-sulfostilbene compound having the formula: in which M and M1 independently represent hydrogen, an alkaline-, an alkaline earth metal or ammonium, x is a number within the range of from 1 to 30, and the crystal form of the hydrate (I) being characterised by an X-ray diffraction pattern which is essentially as set out in the accompanying FIGS. 1 to 11; or a mixture containing one or more of the hydrates of the 4,4′-di-triazinylamino-2,2′-di-sulfostilbene compound having the formula (I); processes for the preparation of the new hydrates; and the use of the new hydrates for the preparation of concentrated aqueous formulations of fluorescent whitening agents.Type: GrantFiled: September 21, 2000Date of Patent: December 18, 2001Assignee: Ciba Specialty Chemicals CorporationInventors: Peter Rohringer, André Geoffroy, Andreas Burkhard, Erwin Marti, Werner Schreiber, Josef Zelger
-
Patent number: 6302999Abstract: A simplified method for the optical brightening of paper either in the pulp mass, the size or metering press or by coating by the use of a formulation of an optical brightening agent together with a swellable layered silicate.Type: GrantFiled: September 14, 1998Date of Patent: October 16, 2001Assignee: Ciba Specialty Chemicals Corp.Inventors: Thomas Engelhardt, Peter Rohringer
-
Publication number: 20010014989Abstract: The present invention provides new compounds having the formula: 1Type: ApplicationFiled: January 22, 2001Publication date: August 23, 2001Inventors: Peter Rohringer, Georges Metzger, Dieter Reinehr
-
Patent number: 6274761Abstract: A process for the preparation of sulphonated distyryl-biphenyl compounds of formula (1), in which R1 and R2, independently, are hydrogen, C1-C5-alkyl, C1-C5-alkyl or halogen, and M represents Li, K, an alkaline earth metal or ammonium, characterized by, firstly, reacting a compound of formula (2) with a di- or trialkylamine containing 6-12 carbon atoms in each alkyl group, in a two-phase system consisting of strong aqueous mineral acid and a water immisicible organic solvent and, secondly, reacting the resulting lypophilic ammonium salt with LiOH, KOH, an alkaline earth metal hydroxide, ammonia, a mono-, di- or trialkylamine or a tetraalkylammonium hydroxide, all containing 1-4 carbon atoms in each alkyl group; mono-, di- or tri(C2-C4)alkanolamine, morpholine, piperdine or pyrrolidine.Type: GrantFiled: September 15, 2000Date of Patent: August 14, 2001Assignee: Ciba Specialty Chemicals CorporationInventors: Victor Paul Eliu, Julia Völkel, Peter Rohringer, Roger Wolfgang Basler, Brigitte Gerhild Sereinig
-
Patent number: 6210449Abstract: The present invention provides new compounds having formula (1), in which X is 0 or, preferably, NH; M is hydrogen, an alkali metal atom, ammonium or a cation formed from an amine; each R1, independently, is an aminoacid residue from which a hydrogen atom on the amino group has been removed; n is 1 or 2; and each R2, independently, is hydrogen, C1-C3alkyl, halogen, cyano, COOR in which R is hydrogen or C1-C3alkyl, CONH—R in which R has its previous significance, SO2NH—R in which R has its previous significance, NH—COR in which R has its previous significance, SO3M in which M has its previous significance or, when n is 1, R2 can also be CO—R3 in which R3 is C1-C3alkyl or phenyl; provided that those compounds are excluded in which a) X is NH, n is 1 and R2 is SO3M in which M has its previous significance; or b) X is NH, n is 2 and one R2 is SO3M in which M has its previous significance, and the other R2 is hydrogen, methyl or halogen; or c) X is NH, n is 1, R1 is glycine and R2 is H or CType: GrantFiled: September 20, 1999Date of Patent: April 3, 2001Assignee: Ciba Specialty Chemicals CorporationInventors: Peter Rohringer, Georges Metzger, Dieter Reinehr
-
Patent number: 6153122Abstract: The present invention provides a hydrate of the 4,4'-di-triazinylamino-2,2'-di-sulfostilbene compound having the formula: ##STR1## in which M and M.sub.1 independently represent hydrogen, an alkaline-, an alkaline earth metal or ammonium, x is a number within the range of from 1 to 30, and the crystal form of the hydrate (I) being characterized by an X-ray diffraction pattern which is essentially as set out in the accompanying FIGS. 1 to 11; or a mixture containing one or more of the hydrates of the 4,4'-di-triazinylamino-2,2'-di-sulfostilbene compound having the formula (I); processes for the preparation of the new hydrates; and the use of the new hydrates for the preparation of concentrated aqueous formulations of fluorescent whitening agents.Type: GrantFiled: May 19, 1998Date of Patent: November 28, 2000Assignee: Ciba Specialty Chemicals CorporationInventors: Peter Rohringer, Andre Geoffroy, Andreas Burkhard, Erwin Marti, Werner Schreiber, Josef Zelger
-
Patent number: 6143888Abstract: The present invention provides a process for the inhibition (quenching) of the effect of an anionic fluorescent whitening agents on a substrate, comprising treating the substrate with a triazine UVA compound, some of which are new compounds.Type: GrantFiled: December 2, 1998Date of Patent: November 7, 2000Assignee: Ciba Specialty Chemicals CorporationInventors: Peter Rohringer, Dieter Reinehr, Robert Hochberg, Georges Metzger
-
Patent number: 5976410Abstract: Disclosed are dispersions of fluorescent whitening agents which are suitable for the fluorescent whitening of coating compositions for coating paper or of fibre dispersions (paper pulps) in paper production.Type: GrantFiled: October 7, 1997Date of Patent: November 2, 1999Assignee: Ciba Specialty Chemicals CorporationInventors: Peter Rohringer, Rainer Hans Traber, Peter Ruf, Thomas Engelhardt, Karla Ann Wilzer
-
Patent number: 5830241Abstract: There is described a liquid preparation comprising:a) 10 to 40 % by weight of the fluorescent whitening agent having the formula: ##STR1## wherein M is hydrogen, an alkali metal, ammonium or magnesium; b) 10 to 85% by weight of polyethylene glycol having a mean molecular weight in the range of from 150 to 500;c) 0 to 75% by weight of water; andd) 0 to 20% by weight of one or more auxiliary compounds; each based on the total weight of the liquid preparation.The new formulation is suitable for the fluorescent whitening of paper or detergents, and is stable over a wide range of temperature.Type: GrantFiled: April 22, 1997Date of Patent: November 3, 1998Assignee: Ciba Specialty Chemicals CorporationInventors: Peter Rohringer, Marc Roger Grienenberger
-
Patent number: 5622749Abstract: Accordingly, the present invention provides a method for the fluorescent whitening of paper comprising contacting the paper surface with a coating composition comprising a fluorescent whitening agent having the formula: ##STR1## wherein M is hydrogen, an alkali metal, preferably sodium, ammonium or magnesium; or comprising contacting the paper in the size press with a combination of the compound of formula (1) and an auxiliary selected from a sequestering agent and a dispersing agent and/or an emulsifier.Type: GrantFiled: May 22, 1996Date of Patent: April 22, 1997Assignee: Ciba-Geigy CorporationInventors: Peter Rohringer, Thomas Ehlis, Josef Zelger
-
Patent number: 5254522Abstract: A pressure-sensitive or heat-sensitive recording material essentially comprising in its color reactant system(A) an aromatic or nitrogen-containing heterocyclic aldehyde,(B) an organic condensation component containing an activated methylene group or a primary or secondary nitrogen atom, preferably a primary amino group, and(C) an electrophilic and color-developing component.Type: GrantFiled: March 26, 1991Date of Patent: October 19, 1993Assignee: Ciba-Geigy CorporationInventors: Rudolf Zink, Peter Mockli, Peter Rohringer
-
Patent number: 5201998Abstract: Sizing agents of which some are novel and which have at least one anionic or acidic group which is optionally in the form of a salt and at least two hydrophobic substituents which each have at least 5 carbon atoms, at least two of the most adjacent hydrophobic substituents being bonded to each other with a linking member which has at least 2 hetero atoms, are particularly suitable for use, together with commercially available polymeric, cationic retention aids, in a process for sizing paper or cardboard.Type: GrantFiled: February 28, 1990Date of Patent: April 13, 1993Assignee: Ciba-Geigy CorporationInventors: Rosemarie Topfl, Michael Bernheim, Hubert Meindl, Hans Wegmuller, Peter Rohringer, Dieter Werthemann
-
Patent number: 5064570Abstract: Dispersion fluorescent brightener preparations which contain specific water-insoluble aromatic or C.sub.14 -C.sub.18 fatty alcohol auxiliaries which have melting points between above 40.degree. C. and 200.degree. C. are described. The preparations are used for fluorescent brightening of coating compositions for coating paper, cardboard, wood, films, textile materials, non-woven materials and building materials.Type: GrantFiled: January 24, 1990Date of Patent: November 12, 1991Assignee: Ciba-Geigy CorporationInventor: Peter Rohringer
-
Patent number: 4956049Abstract: Sizing agents, some of which are known compounds and some of which are novel aromatic compounds which contain in the aromatic nucleus a single hydrophobic substituent containing at least 5 carbon atoms and at least one anionic group, said hydrophobic substituent being linked to the aromatic nucleus through an ester, amide, urethane or urea bridge, with the CO group of ester and amide bridges being attached to the hydrophobic radical and a methylene group being optionally present between said bridges and the aromatic nucleus, are particularly suitable, together with commercially available retention aids, for use in a process for the mass sizing of paper or cardboard or for the surface sizing of paper.Type: GrantFiled: June 23, 1989Date of Patent: September 11, 1990Assignee: Ciba-Geigy CorporationInventors: Michael Bernheim, Dieter Strasilla, Bernardo De Sousa, Peter Rohringer