Patents by Inventor Erwin Nikles

Erwin Nikles 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: 5112912
    Abstract: Acrylate copolymers which contain groups are reacted with a 2-hydroxphenylbenzotriazole which contains a carboxyl group. A permanent light stabilization of the acrylate copolymers is thereby achieved. The modified acrylate resins so obtained are particularly suitable for use as binders for coating materials.
    Type: Grant
    Filed: April 29, 1991
    Date of Patent: May 12, 1992
    Assignee: Ciba-Geigy Corp.
    Inventor: Erwin Nikles
  • Patent number: 4528374
    Abstract: Novel oligomer or polymer polyamine-1,3,5-triazines containing at least one polyalkylpiperidine radical, for example that of the formula ##STR1## processes for their production, their use for stabilizing organic material, and the organic material protected therewith against oxidative and light-induced degradation.
    Type: Grant
    Filed: November 9, 1981
    Date of Patent: July 9, 1985
    Assignee: Ciba-Geigy Corporation
    Inventor: Erwin Nikles
  • Patent number: 4360675
    Abstract: Homopolymers and copolymers of vinyl ethers of the formula I ##STR1## in which R is hydrogen or methyl and R.sup.1 is hydrogen C.sub.1 -C.sub.8 -alkyl, benzyl, allyl or C.sub.1 -C.sub.2 -acyl, are effective stabilizers for plastics, especially to protect them against photochemical degradation. The monomeric vinyl ethers of the formula I are novel compounds, which can be prepared from the corresponding piperidinols by vinylation by means of acetylene or by transvinylation by means of vinyl ethers or vinyl esters.
    Type: Grant
    Filed: October 15, 1981
    Date of Patent: November 23, 1982
    Assignee: Ciba-Geigy Corporation
    Inventor: Erwin Nikles
  • Patent number: 4344877
    Abstract: A 4-acyloxypiperidine of the formula I ##STR1## in which R.sub.1 denotes C.sub.1 -C.sub.30 -alkyl, C.sub.3 -C.sub.20 -alkenyl, C.sub.3 -C.sub.20 -alkynyl, C.sub.2 -C.sub.30 -cyanoalkyl, C.sub.2 -C.sub.30 -alkoxyalkyl, C.sub.7 -C.sub.20 -aralkyl, 2,3-epoxypropyl, an aliphatic, alicyclic, aromatic, araliphatic or heterocyclic acyl group with 1-20 C atoms or one of the groups --CH.sub.2 COOR.sub.4, --CH.sub.2 -CH(R.sub.5)--OR.sub.6, --COOR.sub.7 or --CONHR.sub.7, in which R.sub.4 is C.sub.1 -C.sub.12 -alkyl, C.sub.3 -C.sub.6 -alkenyl, phenyl, C.sub.7 -C.sub.8 -aralkyl or cyclohexyl and R.sub.5 is hydrogen, methyl or phenyl and R.sub.6 denotes hydrogen or an aliphatic or aromatic, araliphatic or alicyclic acyl group with 1-18 C atoms, in which the aromatic part can optionally be substituted by chlorine, C.sub.1 -C.sub.4 -alkyl or C.sub.1 -C.sub.8 -alkoxy and/or by hydroxyl, and R.sub.7 denotes C.sub.1 -C.sub.12 -alkyl, cyclohexyl, phenyl or benzyl, R.sub.2 is hydrogen or C.sub.1 -C.sub.8 -alkyl, R.sub.3 is C.sub.
    Type: Grant
    Filed: January 14, 1981
    Date of Patent: August 17, 1982
    Assignee: Ciba-Geigy Corporation
    Inventors: Erwin Nikles, Friedrich Karrer
  • Patent number: 4315859
    Abstract: Novel oligomer or polymer polyamine-1,3,5-triazines containing at least one polyalkylpiperidine radical, for example that of the formula ##STR1## processes for their production, their use for stabilizing organic material, and the organic material protected therewith against oxidative and light-induced degradation.
    Type: Grant
    Filed: January 4, 1980
    Date of Patent: February 16, 1982
    Assignee: Ciba-Geigy Corporation
    Inventor: Erwin Nikles
  • Patent number: 4311820
    Abstract: Homopolymers and copolymers of vinyl ethers of the formula I ##STR1## in which R is hydrogen or methyl and R.sup.1 is hydrogen, C.sub.1 -C.sub.8 -alkyl, benzyl, allyl or C.sub.1 -C.sub.2 -acyl, are effective stabilizers for plastics, especially to protect them against photochemical degradation. The monomeric vinyl ethers of the formula I are novel compounds, which can be prepared from the corresponding piperidinols by vinylation by means of acetylene or by transvinylation by means of vinyl ethers or vinyl esters.
    Type: Grant
    Filed: February 4, 1980
    Date of Patent: January 19, 1982
    Assignee: Ciba-Geigy Corporation
    Inventor: Erwin Nikles
  • Patent number: 4263505
    Abstract: Compounds of the formula ##STR1## and their acid addition salts, wherein n is an integer from 1 to 4, R.sup.1 is hydrogen or CH.sub.3, each of R.sup.2 and R.sup.3 independently is hydrogen, C.sub.1 -C.sub.18 alkyl, C.sub.6 -C.sub.10 aryl or C.sub.7 -C.sub.9 aralkyl which is unsubsititued or substituted by chlorine or C.sub.1 -C.sub.4 alkyl, or R.sup.2 and R.sup.3 together with the carbon atom to which they are attached form a cycloalkane or alkylcycloalkane radical containing 5 to 20 carbon atoms or a polyalkylpiperidine radical, R.sup.4 is a monovalent radical as defined in claim 1, and R.sup.5 is a mono- to tetravalent radical as defined in claim 1. These compounds are valuable stabilizers for plastics. They are obtained by N-substitution of the compounds in which R.sup.4 and R.sup.5 are hydrogen.
    Type: Grant
    Filed: March 24, 1980
    Date of Patent: April 21, 1981
    Assignee: Ciba-Geigy Corporation
    Inventors: Mario Slongo, Erwin Nikles
  • Patent number: 4234707
    Abstract: Blocking of the end groups of condensation and addition polymers which can be used as light stabilizers and in which the recurring structural unit contains a polyalkylpiperidine residue of the formula ##STR1## or is substituted by a polyalkylpiperidine side group of the formula ##STR2## in which R is hydrogen or alkyl having 1-5 C atoms and R' is hydrogen, alkyl having 1-12 C atoms, alkeny having 3-8 C atoms, alkynyl having 3-6 C atoms, aralkyl having 7-12 C atoms, alkanoyl having 1-8 C atoms or alkenoyl having 3-5 C atoms, is effected by adding a monofunctional compound during the preparation of the polymers, or by reacting the polymer, after it has been prepared, with a monofunctional compound. Examples of monofunctional compounds are monocarboxylic acids, monoalcohols, monoamines or monoisocyanates. The polymeric light stabilizers become more stable as a result of the blocking of the end groups.
    Type: Grant
    Filed: November 1, 1978
    Date of Patent: November 18, 1980
    Assignee: Ciba-Geigy Corporation
    Inventors: Jean Rody, Erwin Nikles
  • Patent number: 4012435
    Abstract: The invention comprises [5,8-dihydro-5,8-endomethylene-1-naphthyl]-carbamates and their use in pesticides.
    Type: Grant
    Filed: September 24, 1968
    Date of Patent: March 15, 1977
    Assignee: Ciba-Geigy AG
    Inventor: Erwin Nikles
  • Patent number: 3950533
    Abstract: New carbamates, pesticidal preparations containing them as active ingredient and their utility for combating insects, members of the order acarina, nematodes, molluscs and microorganisms are disclosed. The carbamates correspond to the formula ##SPC1##In which X and Y each represents oxygen or sulphur and R represents a lower alkyl, alkenyl or alkynyl group.
    Type: Grant
    Filed: July 22, 1974
    Date of Patent: April 13, 1976
    Assignee: Ciba-Geigy AG
    Inventor: Erwin Nikles
  • Patent number: 3944674
    Abstract: o-dimethoxy methylphenyl-N-methylcarbamate is disclosed as being useful for combatting insects.
    Type: Grant
    Filed: October 2, 1974
    Date of Patent: March 16, 1976
    Assignee: Ciba-Geigy AG
    Inventors: Erwin Nikles, Volker Dittrich, Ladislaus Pinter
  • Patent number: 3933858
    Abstract: O-Phenylcarbamates, e.g. those of the formula ##EQU1## are biocides, e.g. insecticides.
    Type: Grant
    Filed: October 10, 1974
    Date of Patent: January 20, 1976
    Assignee: Ciba-Geigy AG
    Inventors: Erwin Nikles, Volker Dittrich, Ladislaus Pinter
  • Patent number: 3931408
    Abstract: 2-Alkinyloxyphenyl-N-methylcarbamates are effective pest control agents, especially against insects and members of the order Acarina. They can be used by themselves or as active ingredients in pesticidal preparations.
    Type: Grant
    Filed: June 6, 1974
    Date of Patent: January 6, 1976
    Assignee: Ciba-Geigy AG
    Inventor: Erwin Nikles