Patents Assigned to American Hoechst Corporation
  • Patent number: 4863827
    Abstract: A process for forming a multi-level positive working photosensitive element. One forms a composition containing an alkali soluble resin, an o-quinonediazide compound and an in-situ generated acid catalyzed crosslinker in a solvent mixture. After coating on a substrate, drying and partially cross-linking the first layer, a second positive working light sensitive layer is applied. Each light sensitive layer is activated by u.v. radiation in different parts of the spectrum. The top layer is imagewise exposed and developed to form a mask. The second layer is flood exposed through this mask and developed. Each development is conducted with an aqueous alkaline solution.
    Type: Grant
    Filed: October 20, 1986
    Date of Patent: September 5, 1989
    Assignee: American Hoechst Corporation
    Inventors: Sangya Jain, Yuh-Loo Chang
  • Patent number: 4816591
    Abstract: 6,11-Dihydrodibenz[b,e]oxepin-acetic acids and derivatives having the general formula ##STR1## are prepared by multi-steps sequences. X is C.dbd.O, CHCl, CHBr, CH.sub.2 or CHOR.sup.4 ; Y is alkyl or alkoxy of 1 to 4 carbon atoms, halogen or trifluoromethyl; n is 0, 1, 2 or 3; Z is COOR.sup.5, CH.sub.2 OR.sup.5, CONR.sub.2.sup.5 or CONHOR.sup.5 ; and R.sup.1 -R.sup.5 are hydrogen or alkyl of 1 to 4 carbon atoms.These compounds and the physiologically tolerable salts thereof are useful as antiinflammatory and analgesic agents.
    Type: Grant
    Filed: November 5, 1979
    Date of Patent: March 28, 1989
    Assignee: American Hoechst Corporation
    Inventors: Grover C. Helsley, Arthur R. McFadden, David Hoffman
  • Patent number: 4810434
    Abstract: A process for surface modification of oriented polymeric film is disclosed. The process, applicable to polyesters, polyolefins, and polyamides, involves subjecting the film surface to at least one short pulse of intense electromagnetic radiation. Such surface treatment enhances the heat seal adhesion of the oriented polymeric film.
    Type: Grant
    Filed: October 17, 1986
    Date of Patent: March 7, 1989
    Assignee: American Hoechst Corporation
    Inventor: R. Scott Caines
  • Patent number: 4790293
    Abstract: A solar heating apparatus for a tank of water is disclosed which comprises a plurality of substantially planar, light absorbent strips positioned substantially vertically in spaced relationship in the water. The plurality of strips functions as a light trap for solar radiation.
    Type: Grant
    Filed: February 10, 1984
    Date of Patent: December 13, 1988
    Assignee: American Hoechst Corporation
    Inventor: R. Scott Caines
  • Patent number: 4772538
    Abstract: This invention relates to a radiation polymerizable composition for use in a photographic element such as a lithographic printing plate comprising in admixture(a) a binder resin having the general formula--A--B--C--wherein a plurality of each of components A, B and C occur in ordered or random sequence in the resin and wherein A is present in said resin at about 5% to about 20% by weight and comprises groups of the formula ##STR1## B is present in said resin at about 4% to about 30% by weight and comprises groups of the formula ##STR2## and C is present in said resin at about 50% to about 91% by weight and comprises acetal groups consisting of groups of the formulae ##STR3## where R is lower alkyl or hydrogen, and wherein said group I is present in component C from about 75% to about 85%, group II is present in component C from about 3% to about 5%; and group III is present in component C from about 10% to about 22%;(b) a photoinitiator;(c) a photopolymerizable mixture of(1) a polyethoxylate diacrylate monome
    Type: Grant
    Filed: August 2, 1985
    Date of Patent: September 20, 1988
    Assignee: American Hoechst Corporation
    Inventors: John E. Walls, Frank C. Pagano
  • Patent number: 4772533
    Abstract: This invention relates to positive working photosensitized sheet constructions which, upon exposure to an actinic radiation source through a screened image, can accurately reproduce said image. The construction is useful as a color proofing film which can be employed to predict the image quality from a lithographic printing process.
    Type: Grant
    Filed: November 5, 1986
    Date of Patent: September 20, 1988
    Assignee: American Hoechst Corporation
    Inventors: Stephan J. W. Platzer, Gabor I. Koletar, Richard L. Shadrach
  • Patent number: 4745019
    Abstract: A primer coated, oriented polyester film material is provided wherein the primer is applied in an aqueous medium comprising a water dispersible copolyester consisting essentially of the condensation product of components A, B, C, and D or their polyester forming equivalents as follows:(A) about 60 to 75 mole percent of terephthalic acid;(B) about 15 to 25 mole percent of at least one dicarboxylic acid of the formula HOOC(CH.sub.2).sub.n COOH, wherein n ranges from about 1-11;(C) greater than from about 6 up to about 15 mole percent of at least one sulfomonomer containing an alkali metal sulfonate group attached to a dicarboxylic aromatic nucleus, and(D) Stoichiometric quantities, i.e., about 100 mole percent of at least one aliphatic or cycloaliphatic alkylene glycol copolymerizable therewith having about from 2 to 11 carbon atoms.The copolyester priming layer may be applied to the polyester film at any suitable stage during manufacture of the film, i.e., before or during the stretching operations.
    Type: Grant
    Filed: January 23, 1986
    Date of Patent: May 17, 1988
    Assignee: American Hoechst Corporation
    Inventors: Robert G. Posey, Edwin C. Culbertson
  • Patent number: 4726928
    Abstract: Resinous compositions that are stabilized against the deteriorative effect of gamma and other ionizing radiation comprises a vinyl halide resin, from 2% to 4% by weight, based on the weight of the vinyl halide resin, of an organotin mercaptoacid ester, and an epoxy compound in the amount of from 3 parts to 5 parts by weight of the epoxy compound per part by weight of the organotin mercaptoacid ester.The stabilized vinyl halide resin compositions can be used in the aseptic packaging of foods and other perishable materials.
    Type: Grant
    Filed: April 18, 1986
    Date of Patent: February 23, 1988
    Assignee: American Hoechst Corporation
    Inventors: Adam J. Ejk, Mark A. Jachym
  • Patent number: 4692397
    Abstract: A method of producing a light sensitive element wherein a substrate is coated with a photosensitive layer having a particular class of diazonium salts, a colorant and a polyvinyl acetal resin. Upon imagewise exposure it is developed with an aqueous composition of salts and surfactants in the absence of organic solvents.
    Type: Grant
    Filed: November 27, 1985
    Date of Patent: September 8, 1987
    Assignee: American Hoechst Corporation
    Inventor: Shuchen Liu
  • Patent number: 4692398
    Abstract: The invention provides a composition which comprises from about 3 to about 50% by weight of a hexa-alkyl disilazane and a solvent composition which comprises one or more compounds selected from the group consisting of a propylene glycol alkyl ether and a propylene glycol alkyl ether acetate.
    Type: Grant
    Filed: October 28, 1985
    Date of Patent: September 8, 1987
    Assignee: American Hoechst Corporation
    Inventor: Dana Durham
  • Patent number: 4681723
    Abstract: An improved apparatus and method for calendering of thermoplastic material are disclosed. An endless belt is interposed between the calendered material and the last calender roll which belt conveys the thermoplastic calendered sheet around the last calender roll and toward the stripper roll. The thermoplastic calendered sheet does not come into contact with the final calender roll surface. After cooling the film should strip easily off the endless belt. Consequently, problems originating in sheet adhesion to the final calender roll will be reduced if not eliminated.
    Type: Grant
    Filed: November 1, 1985
    Date of Patent: July 21, 1987
    Assignee: American Hoechst Corporation
    Inventor: Randy D. Jester
  • Patent number: 4670507
    Abstract: This invention relates to a resin having the general formula--A--B--C--wherein a plurality of each of components A, B and C occur in ordered or random sequence in the resin and wherein A is present in said resin at about 5% to about 20% by weight and comprises groups of the formula ##STR1## B is present in said resin at about 4% to about 30% by weight and comprises groups of the formula ##STR2## and C is present in said resin at about 50% to about 91% by weight and comprises acetal groups consisting of groups of the formulae ##STR3## where R is lower alkyl or hydrogen, and wherein said group I is present in component C from about 75% to about 85%; group II is present in component C from about 3% to about 5%; and group III is present in component C from about 10% to about 22%.
    Type: Grant
    Filed: August 2, 1985
    Date of Patent: June 2, 1987
    Assignee: American Hoechst Corporation
    Inventors: John E. Walls, Major S. Dhillon, Gabor I. Koletar
  • Patent number: 4664709
    Abstract: This invention is directed to new azoacylacetamide dispersing agents for azo pigments and azo pigment compositions made therefrom. The pigment compositions of this invention comprise a mixture of dispersing agents which are represented below by abbreviated Formula I and pigments which are represented by the abbreviated Formula II, wherein said dispersing agents are present in an amount of 1-25% and said pigments are present in an amount of 99 to 75%: ##STR1## where: A is an aromatic or heterocyclic amino group;B is an aromatic or heterocyclic bisdiazonium group;D is an aliphatic polyamino group containing at least three nitrogen atoms.
    Type: Grant
    Filed: February 25, 1985
    Date of Patent: May 12, 1987
    Assignee: American Hoechst Corporation
    Inventor: Richard Castenson
  • Patent number: 4665124
    Abstract: This invention relates to a resin having the general formula--A--B--C--wherein a plurality of each of components A, B and C occur in ordered or random sequence in the resin and wherein A is present in said resin at about 5% to about 20% by weight and comprises groups of the formula ##STR1## B is present in said resin at about 4% to about 30% by weight and comprises groups of the formula ##STR2## and C is present in said resin at about 50% to about 91% by weight and comprises acetal groups consisting of groups of the formulae ##STR3## where R is lower alkyl or hydrogen, and wherein said group I is present in component C from about 75% to about 85%; group II is present in component C from about 3% to about 5%; and group III is present in component C from about 10% to about 22%.
    Type: Grant
    Filed: October 14, 1986
    Date of Patent: May 12, 1987
    Assignee: American Hoechst Corporation
    Inventors: John E. Walls, Major S. Dhillon, Gabor I. Koletar
  • Patent number: 4661056
    Abstract: An apparatus and method for incinerating combustible gases. The apparatus has first and second perpendicularly joined pipes and an igniter in the second pipe. Combustible gases laminarly flow into the second pipe and oxygen turbulently flows into the first. The gases turbulently mix, ignite and centrifugally swirl from the first pipe to the second pipe and then out the first pipe again. Fuel flow is regulated by flame, temperature and seismic detectors.
    Type: Grant
    Filed: March 14, 1986
    Date of Patent: April 28, 1987
    Assignee: American Hoechst Corporation
    Inventors: Earl Vickery, Mark Yates
  • Patent number: 4659774
    Abstract: This invention relates to a support for oligonucleotide synthesis and more particularly to a necleoside-linker/polymer support composite having the general formulaP'--S'wherein P' is a polymer support which bears oxirane, aziridine or episulfide groups or which contains good leaving groups for nucleophilic displacement; and S' is a nucleoside-linker having the general formulaW--(CH.sub.2).sub.a --X--(CH.sub.2).sub.b --Y--(CH.sub.2).sub.c --Zwherein W and Z each independently comprise a nucleophile; X and Y which, independently may or may not be present, comprise groups of high hydrophilicity; and a, b, c are integers from 0 to 9, wherein a plus b plus c exceeds 6.
    Type: Grant
    Filed: November 1, 1985
    Date of Patent: April 21, 1987
    Assignee: American Hoechst Corporation
    Inventors: Thomas R. Webb, Chien-Pin S. Hsu
  • Patent number: 4659523
    Abstract: A process for preparing an iodine stainable polyester polarizer film which comprises:(a) extruding a moving molten web of polyester film; and(b) quenching said moving web to solidify it in a substantially amorphous form; and(c) applying an anchor coating to at least a portion of the surface of said film wherein said anchor coating improves adhesion of polyvinyl alcohol to polyester film; and(d) applying a coating of a dispersed aqueous composition of polyvinyl alcohol to at least a portion of the surface of said film; and(e) stretching said moving web in a direction transverse to the direction of motion while heating said web at a temperature of from about its glass transition temperature to about 160.degree. C.; and(f) crystallizing said moving web by heating it to a temperature in the range of 130.degree. C. to 240.degree. C. without stretching said web; and(g) cooling said web to substantially ambient atmospheric temperature.
    Type: Grant
    Filed: November 30, 1984
    Date of Patent: April 21, 1987
    Assignee: American Hoechst Corporation
    Inventors: John H. Rogers, Michael J. Hopper, Michael R. Martin
  • Patent number: 4659642
    Abstract: This invention relates to positive working photosensitized sheet constructions which, upon exposure to an actinic radiation source through a screened image, can accurately reproduce said image. The construction is useful as a color proofing film which can be employed to predict the image quality from a lithographic printing process.
    Type: Grant
    Filed: October 22, 1984
    Date of Patent: April 21, 1987
    Assignee: American Hoechst Corporation
    Inventors: Stephan J. W. Platzer, Gabor I. Koletar, Richard L. Shadrach
  • Patent number: 4652604
    Abstract: This invention relates to a radiation polymerizable composition for use in a photographic element such as a lithographic printing plate comprising in admixture(a) a binder resin having the general formula--A--B--C--wherein a plurality of each of components A, B and C occur in ordered or random sequence in the resin and wherein A is present in said resin at about 5% to about 20% by weight and comprises groups of the formula ##STR1## B is present in said resin at about 4% to about 30% by weight and comprises groups of the formula ##STR2## and C is present in said resin at about 50% to about 91% by weight and comprises acetal groups consisting of groups of the formulae ##STR3## where R is lower alkyl or hydrogen, and wherein said group I is present in component C from about 75% to about 85%, group II is present in component C from about 3% to about 5%; and group III is present in component C from about 10% to about 22%.
    Type: Grant
    Filed: August 2, 1985
    Date of Patent: March 24, 1987
    Assignee: American Hoechst Corporation
    Inventors: John E. Walls, Carlos Tellechea, Major S. Dhillon
  • Patent number: 4650738
    Abstract: This invention relates to negative photosensitized sheet constructions which, upon exposure to an actinic radiation source through a screened image, can accurately reproduce said image. The construction is useful as a color proofing film which can be employed to predict the image quality from a lithographic printing process.
    Type: Grant
    Filed: October 22, 1984
    Date of Patent: March 17, 1987
    Assignee: American Hoechst Corporation
    Inventors: Stephan J. W. Platzer, Gabor I. Koletar