Abstract: Disclosed are hole-transport polymeric liquid crystalline compounds having the formula (I) ##STR1## wherein A and B are alkylsubstituted siloxane or acrylate repeating units;S.sub.1 and S.sub.2 are alkylene spacer groups;L is a mesogenic group;HT is a hole-transport functionality; andx and y are integers, the ratio of x to y is from about 100 to about 0.1, the sum of x and y is from about 10 to about 500.Multi-active and single active electrophotographic elements comprising these compounds and electrophotographic processes are also disclosed.

Abstract: Disclosed are electron-transport polymeric liquid crystalline compounds having the formula (I) ##STR1## wherein A and B are alkylsubstituted siloxane or acrylate repeating units;S.sub.1 and S.sub.2 are alkylene spacer groups;L is a mesogenic group;ET is an electron-transport functionality; andx and y are integers, the ratio of x to y is from about 100 to about 0.1, the sum of x and y is from about 5 to about 100.Multi-active and single active electrophotographic elements comprising these compounds and electrophotographic processes are also disclosed.

Abstract: New inverse multiactive electrophotographic elements comprise, in order:an electrically conductive layer;a charge-transport layer;a first charge-generation layer containing a charge-generation material and a charge-transport material; anda second charge-generation layer containing a charge-generation material and a charge-transport material different from and less susceptible to positive-surface-charge injection than the charge-transport material of the first charge-generation layer.

Abstract: New electrophotographic elements contain electron-transport agents comprising certain new chemical compounds, which are derivatives of 4H-thiopyran-1,1-dioxides.

Abstract: New electrophotographic elements contain electron-transport agents comprising certain new chemical compounds, which are derivatives of 4H-thiopyran-1,1-dioxides.

Abstract: A reusable photoconductor element is provided which has sensitivity in the near infrared spectral region. The element employs successively applied layers of perylene dicarboximide pigment and cyanine dye.

Abstract: Certain new chemical compounds are derivatives of 4H-thiopyran-1,1-dioxides, and are useful as electron-transport agents in electrophotographic elements.

Abstract: Certain new chemical compounds are derivatives of 4H-thiopyran-1,1-dioxides, and are useful as electron-transport agents in electrophotographic elements.

Abstract: In accordance with the present invention there is provided an organic compound having the formula selected from the group consisting of: ##STR1## wherein x is an integer from 0 to 2, y is an integer from 1 to 6, and z is an integer from 0 to 2; ##STR2## wherein L is aliphatic, alicyclic or aromatic and a is an integer from 2 to 6; and wherein G has the formula ##STR3## wherein n is an integer from 0 to 6 and Q.sub.1, Q.sub.2, Q.sub.3, Q.sub.5, Q.sub.6, and Q.sub.7, which may be the same or different, represent H or CH.sub.3, and Q.sub.4 represents H or CH.sub.3 when x and z are 0 or n is greater than 0, or Q.sub.4 represents CH.sub.3 when x or z are 1 or 2 and n is 0.The compounds, which exhibit unexpectedly high T.sub.g and unexpectedly high resistance to oxidation, are useful in electrophotographic elements.

Abstract: Disclosed are electrically photosensitive polymers in which recurring units contain vinylene-1,4-phenylene-imino-1,4-phenylene-vinylenearylene groups included in the polymer backbone. In one embodiment, the disclosed polymers are employed as the principal electrically photosensitive constituent in migration imaging dispersions and elements. In another embodiment, the polymers are employed as sensitizers for electrically photosensitive colorants having spectral absorption peaks in the 400-500 nm wavelength region of the spectrum. The polymers are employed in migration imaging dispersions and elements.

Abstract: Photoconductive layers containing a crystallization inhibiting mixture of at least two different organic photoconductors selected from the class of photoconductors represented by the following formula ##STR1## wherein R is selected from the group consisting of alkyl, aralkyl, and substituted and unsubstituted aryl;X and X' which may be the same or different are selected from the group consisting of hydrogen, alkyl, alkoxy, hydroxyl, NO.sub.2 and halogen;Y and Y' which may be the same or different are selected from the group consisting of hydrogen, alkyl, alkoxy, hydroxyl, halogen and NO.sub.

Abstract: An organic photoconductive insulating composition and electrophotographic elements containing the same are prepared using as a photoconductor a polyarylalkane compound having the formula ##STR1## wherein R.sup.1 and R.sup.2 represent hydrogen, alkyl, or aryl groups, R.sup.3, R.sup.4, R.sup.5 and R.sup.6 represent aryl groups, and A.sup.1 and A.sup.2 represent phenyl groups.

Abstract: A photoconductive polymer, and photoconductive insulating compositions and elements containing the same, are disclosed. The aforementioned polymer is a condensation product, preferably of relatively low molecular weight, of certain tertiary aromatic amines and certain carbonyl-containing compounds.

Abstract: An aggregate or heterogeneous multiphase photoconductive composition containing a continuous polymer phase and at least one discontinuous phase dispersed in said continuous phase, said discontinuous phase comprising a co-crystalline complex of (i) at least one polymer having an alkylidene diarylene group in a recurring unit (ii) at least one pyrylium type dye salt having a non-light absorbing anion, and (iii) at least one pyrylium type dye salt having a colored organic or organo-metallic anion of a strong acid.

Abstract: In organic, photoconductive insulating compositions including one or more organic photoconductors, the image contrast characteristics obtained when using such compositions can be modified or modifiable when the composition includes a triaminobenzene compound, such as one having the formula ##SPC1##Wherein each of Z, Z.sup.1 and Z.sup.2, taken together with the nitrogen to which each is attached, represents the non-metallic atoms necessary to complete a heterocyclic group having from 5 to 10 atoms in the cyclic nucleus.