Patents by Inventor John F. Yanus

John F. Yanus 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: 4346158
    Abstract: A photosensitive member having at least two electrically operative layers is disclosed. The first layer comprises an electrically conductive layer. The second layer comprises a charge transport layer. The third layer is a photoconductive layer contiguous with the transport layer. The photoconductive layer is capable of photogenerating and injecting photogenerated holes into the contiguous or adjacent electrically active part. The electrically active material comprises a polycarbonate resin material having dispersed therein from about 25 to 75 percent by weight of one or more compounds having the general formula: ##STR1## wherein X is selected from the group consisting of an alkyl group having from 1 to about 4 carbon atoms (e.g. methyl, ethyl, propyl, butyl, etc.) and chlorine in the ortho, meta or para position. This structure may be imaged in the conventional xerographic mode which usually includes charging, exposure to light and development.
    Type: Grant
    Filed: May 4, 1981
    Date of Patent: August 24, 1982
    Assignee: Xerox Corporation
    Inventors: Damodar M. Pai, Milan Stolka, John F. Yanus
  • Patent number: 4306008
    Abstract: A photosensitive member having at least two electrically operative layers is disclosed. The first layer comprises a photoconductive layer which is capable of photogenerating holes and injecting photogenerated holes into a contiguous charge transport layer. The charge transport layer comprises a polycarbonate resin containing from about 25 to about 75 percent by weight of one or more of a compound having a general formula: ##STR1## wherein R is selected from the group consisting of an alkyl group having from 1 to about 4 carbon atoms and chlorine in the ortho, meta or para position. This structure may be imaged in the conventional xerographic mode which usually includes charging, exposure to light and development.
    Type: Grant
    Filed: December 4, 1978
    Date of Patent: December 15, 1981
    Assignee: Xerox Corporation
    Inventors: Damodar M. Pai, James M. Pearson, Milan Stolka, John F. Yanus
  • Patent number: 4299897
    Abstract: A photosensitive member having at least two electrically operative layers is disclosed. The first layer comprises a photoconductive layer which is capable of photogenerating holes and injecting photogenerated holes into a contiguous charge transport layer. The charge transport layer comprises an electrically inactive organic resinous material containing from about 10 to about 75 percent by weight of: ##STR1## R.sub.1 is selected from the group consisting of hydrogen (ortho) CH.sub.3, (meta) CH.sub.3, (para) CH.sub.3, and R.sub.2 is selected from the group consisting of hydrogen, (ortho) CH.sub.3, (meta) CH.sub.3, and (para) CH.sub.3. The charge transport layer while substantially non-absorbing in the spectral region of intended use is "active" in that it allows injection of photogenerated holes from the photoconductive layer, and allows these holes to be transported through the charge transport layer.
    Type: Grant
    Filed: February 15, 1980
    Date of Patent: November 10, 1981
    Assignee: Xerox Corporation
    Inventors: Milan Stolka, John F. Yanus, Damodar M. Pai, Dale S. Renfer, James M. Pearson
  • Patent number: 4273846
    Abstract: An imaging member comprising a charge generation layer comprising a layer of photoconductive material and a contiguous charge transport layer of a polycarbonate resin material having dispersed therein from about 25 to about 75 percent by weight of one or more diamine compound having the general formula: ##STR1## wherein X.sub.1 and X.sub.2 are independently selected from the group consisting of a lower alkyl group having from 1 to about 4 carbon atoms, chlorine in the ortho, meta or para position, a para phenyl group and combinations thereof.
    Type: Grant
    Filed: November 23, 1979
    Date of Patent: June 16, 1981
    Assignee: Xerox Corporation
    Inventors: Damodar M. Pai, S. Richard Turner, John F. Yanus, Dale S. Renfer, Milan Stolka
  • Patent number: 4265990
    Abstract: A photosensitive member having at least two electrically operative layers is disclosed. The first layer comprises a photoconductive layer which is capable of photogenerating holes and injecting photogenerated holes into a contiguous charge transport layer. The charge transport layer comprises a polycarbonate resin containing from about 25 to about 75 percent by weight of one or more of a compound having the general formula: ##STR1## wherein X is selected from the group consisting of an alkyl group having from 1 to about 4 carbon atoms (e.g. methyl, ethyl, propyl, butyl, etc.) and chlorine in the ortho, meta or para position. This structure may be imaged in the conventional xerographic mode which usually includes charging, exposure to light and development.
    Type: Grant
    Filed: December 4, 1978
    Date of Patent: May 5, 1981
    Assignee: Xerox Corporation
    Inventors: Milan Stolka, Damodar M. Pai, John F. Yanus
  • Patent number: 4233384
    Abstract: A photosensitive member having at least two electrically operative layers is disclosed. The first layer comprises a photoconductive layer which is capable of photogenerating holes and injecting photogenerated holes into a contiguous charge transport layer. The charge transport layer comprises a polycarbonate resin containing from about 25 to about 75 percent by weight of one or more of a compound having the general formula: ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are selected from the group consisting of hydrogen, an ortho, meta or para alkyl group having from 1 to about 4 carbon atoms, an ortho, meta or para halogen atom, a para phenyl group and combinations thereof.
    Type: Grant
    Filed: April 30, 1979
    Date of Patent: November 11, 1980
    Assignee: Xerox Corporation
    Inventors: S. Richard Turner, John F. Yanus, Damodar M. Pai
  • Patent number: 4140529
    Abstract: A photosensitive member having at least two electrically operative layers is disclosed. The first layer comprises a photoconductive layer which is capable of photogenerating holes and injecting photogenerated holes into a contiguous charge transport layer. The charge transport layer comprises an electrically inactive organic resinous material containing from about 10 to about 75 percent by weight of: ##STR1## where R.sub.1 is selected from the group consisting of an alkyl with from 1 to 12 carbon atoms and an alkyl with from 1 to 12 carbon atoms substituted by aryl groups selected from the group consisting of phenyl, maphthyl, anthryl, and biphenyl and R.sub.2 is selected from the group consisting of methyl, ethyl, chloro, bromo and hydrogen.
    Type: Grant
    Filed: September 22, 1977
    Date of Patent: February 20, 1979
    Assignee: Xerox Corporation
    Inventors: Damodar M. Pai, John F. Yanus, Milan Stolka
  • Patent number: 4117239
    Abstract: Process for preparation of 2-anthryl and substituted 2-anthryl functional monomers and polymers. In the process for preparation of these monomers, an anthracenic reactant of the formula: ##STR1## wherein X and Y are independently selected from hydrogen, chlorine, bromine, alkyl of 1 to 4 carbon atoms or phenylIs acylated in nitrobenzene under conditions which favor reaction at the two position. The resulting acylated product can then be (a) reacted with an alkylidenephosphorane (Wittig synthesis) or (b) reduced to the corresponding alcohol. Subsequent to such reduction, this alcohol can undergo further modification at the hydroxyl function to form a polymerizable addition monomer.
    Type: Grant
    Filed: March 7, 1975
    Date of Patent: September 26, 1978
    Assignee: Xerox Corporation
    Inventors: Milan Stolka, James M. Pearson, John F. Yanus
  • Patent number: 4115116
    Abstract: A photosensitive member having at least two electrically operative layers is disclosed. The first layer comprises a photoconductive layer which is capable of photogenerating holes and injecting photogenerated holes into a contiguous charge transport layer. The charge transport layer comprises an electrically inactive organic resinous material containing from about 15 to about 75 percent by weight of N,N'-diphenyl-N,N'-bis(phenylmethyl)-[1,1'-biphenyl]-4,4'-diamine. The charge transport layer while substantially non-absorbing in the spectral region of intended use is "active" in that it allows injection of photogenerated holes from the photoconductive layer, and allows these holes to be transported through the charge transport layer. This structure may be imaged in the conventional xerographic mode which usually includes charging, exposure to light and development.
    Type: Grant
    Filed: May 4, 1977
    Date of Patent: September 19, 1978
    Assignee: Xerox Corporation
    Inventors: Milan Stolka, Damodar M. Pai, John F. Yanus
  • Patent number: 4053311
    Abstract: A photosensitive member having at least two electrically operative layers is disclosed. The first layer comprises a photoconductive layer which is capable of photogenerating holes and injecting the photo-generated holes into a contiguous charge transport layer. The charge transport layer comprises poly(N-vinylcarbazole) which contains an electrically active plasticizer comprising from about 1 to about 25 percent by weight of bis(4-diethylamino-2-methylphenyl)phenylmethane. The charge transport layer while substantially non-absorbing in the spectral region of intended use, is "active" in that it allows injection of photo-generated holes from the photoconductive layer, and allows these holes to be transported through the charge transport layer. This structure may be imaged in the conventional xerographic mode which usually includes charging, exposure to light and development.
    Type: Grant
    Filed: April 2, 1976
    Date of Patent: October 11, 1977
    Inventors: William W. Limburg, John F. Yanus, Damodar M. Pai
  • Patent number: 4052205
    Abstract: Novel photoconductive imaging members are provided comprising a layer of inorganic photoconductive material contained on a supporting substrate with a contacting layer of an electrically active organic material contiguous with the photoconductive layer comprising a plasticizer of an alkyl substituted anthracene.
    Type: Grant
    Filed: September 24, 1975
    Date of Patent: October 4, 1977
    Assignee: Xerox Corporation
    Inventors: Milan Stolka, John F. Yanus
  • Patent number: 4050935
    Abstract: A photosensitive member having at least two electrically operative layers is disclosed. The first layer comprises trigonal selenium which is capable of photogenerating holes and injecting the photo-generated holes into a contiguous charge transport layer. The charge transport layer comprises a transparent electrically inactive organic resinous material containing from about 15 to about 75 percent by weight (throughout) of bis(4-diethylamino-2-methylphenyl)phenylmethane. The charge transport layer while substantially non-absorbing in the spectral region of intended use, is "active" in that it allows injection of photo-generated holes from the trigonal selenium carrier generating layer, and allows these photo-generated holes to be transported through the charge transport layer. This structure may be imaged in the conventional xerographic mode which usually includes charging, exposure to light and development.
    Type: Grant
    Filed: April 2, 1976
    Date of Patent: September 27, 1977
    Assignee: Xerox Corporation
    Inventors: William W. Limburg, John F. Yanus, Damodar M. Pai
  • Patent number: 4043812
    Abstract: Process for preparation of 2-anthryl and substituted 2-anthryl functional monomers and polymers. In the process for preparation of these monomers, an anthracenic reactant of the formula: ##STR1## wherein X and Y are independently selected from hydrogen, chlorine, bromine, alkyl of 1 to 4 carbon atoms or phenylIs acylated in nitrobenzene under conditions which favor reaction at the two position. The resulting acylated product can then be (a) reacted with an alkylidenephosphorane (Wittig synthesis) or (b) reduced to the corresponding alcohol. Subsequent to such reduction, this alcohol can undergo further modification at the hydroxyl function to form a polymerizable addition monomer.
    Type: Grant
    Filed: March 7, 1975
    Date of Patent: August 23, 1977
    Assignee: Xerox Corporation
    Inventors: Milan Stolka, James M. Pearson, John F. Yanus
  • Patent number: 4011266
    Abstract: Disclosed is a composition of matter characterized by the structural formula: ##STR1## wherein R.sub.1 is hydrogen or methyl and R.sub.2, R.sub.3 and R.sub.4 are hydrogen, halogen substituted or unsubstituted alkyl groups containing 1 to 4 carbon atoms. Also disclosed are vinyl polymers of the above compounds.
    Type: Grant
    Filed: October 31, 1973
    Date of Patent: March 8, 1977
    Assignee: Xerox Corporation
    Inventors: James M. Pearson, John F. Yanus
  • Patent number: 4009151
    Abstract: Disclosed is a composition of matter characterized by the structural formula: ##STR1## wherein R.sub.1 is hydrogen or methyl and R.sub.2, R.sub.3 and R.sub.4 are hydrogen, halogen or aliphatic groups containing 1 to 4 carbon atoms. Also disclosed are vinyl polymers of the above compounds.
    Type: Grant
    Filed: October 30, 1975
    Date of Patent: February 22, 1977
    Assignee: Xerox Corporation
    Inventors: James M. Pearson, John F. Yanus