Patents Represented by Attorney William J. VAN Loo

Find this attorney in the Justia Lawyer Directory

  • Process for the production of a halogen-containing arcylic synthetic fiber improved in flame retardancy
    Patent number: 4022750
    Abstract: Halogen-containing acrylic fibers are improved in flame retardancy when a diorganotin oxide compound is incorporated therein.
    Type: Grant
    Filed: July 11, 1974
    Date of Patent: May 10, 1977
    Assignee: American Cyanamid Company
    Inventors: Kenji Takeya, Hiroshi Suzuki, Tadashi Ichimaru
  • Process for catalyst materials of increased pore volume and pore diameter
    Patent number: 4022715
    Abstract: Disclosed is a process for producing molded catalyst materials of increased pore volume and pore diameter which comprises incorporating a blowing agent in the composition from which they are molded.
    Type: Grant
    Filed: December 31, 1975
    Date of Patent: May 10, 1977
    Assignee: American Cyanamid Company
    Inventor: Robert Alan Bornfriend
  • Process for printing fiber products of acrylic fiber blends
    Patent number: 4021196
    Abstract: Fiber products of a blend of an acrylic fiber substantially free of acid dye sites with an acid dyeable fiber are printed with a dye paste containing a monosulfonic acid dye having an inorganicity/organicity ratio less than 4 to dye both fibers of the blend uniformly. As an alternative an additional acid dye outside the specific class designated may be used to augment the dyeing of the acid dyeable fiber.
    Type: Grant
    Filed: December 13, 1973
    Date of Patent: May 3, 1977
    Assignee: American Cyanamid Company
    Inventors: Eichiro Ueno, Hideo Kawasaki, Shozo Shigita
  • Adiabatic process for nitration of nitratable aromatic compounds
    Patent number: 4021498
    Abstract: An adiabatic process for the mononitration of nitratable aromatic hydrocarbons and halo substituted aromatic hydrocarbons which yield a mononitration product containing less than 500 ppm. of dinitrated product is disclosed.
    Type: Grant
    Filed: December 9, 1975
    Date of Patent: May 3, 1977
    Assignee: American Cyanamid Company
    Inventors: Verner Alexanderson, James Bryant Trecek, Cornelius Marsden Vanderwaart
  • Acrylic fiber of improved properties
    Patent number: 4012459
    Abstract: There are disclosed a process for preparing acrylic fibers of improved hot-wet properties and improved elastic recovery by finely dispersing in the spin dope prior to spinning a solution of a polycarbonate resin in a solvent immiscible with the spin dope. The acrylic fibers so produced contain elongated fibrils of the polycarbonate resin of 0.05 to 5.0 microns diameter and up to several centimeters long.
    Type: Grant
    Filed: August 15, 1973
    Date of Patent: March 15, 1977
    Assignee: American Cyanamid Company
    Inventors: Kenji Takeya, Hiroshi Suzuki, Noboru Yamawaki
  • Method for improving physical properties of catalyst materials through the incorporation of fines therein and catalyst prepared by the method
    Patent number: 4012339
    Abstract: The use of calcined fines in the preparation of catalyst materials from inorganic oxide gels results in improved physical properties when a significant portion of said fines are smaller than about 40 microns.
    Type: Grant
    Filed: November 4, 1975
    Date of Patent: March 15, 1977
    Assignee: American Cyanamid Company
    Inventor: Robert Henry Ebel
  • Synthetic organic flocculants to clarify raw sugar liquor
    Patent number: 4009706
    Abstract: A combination of a cationic melamine:formaldehyde acid colloid and an anionic polyacrylamide are effective flocculants to clarify raw sugar liquor.
    Type: Grant
    Filed: June 18, 1976
    Date of Patent: March 1, 1977
    Assignee: American Cyanamid Company
    Inventor: Paul Eugene Shaughnessey
  • Stable alumina catalyst support, process therefor, and promoted support
    Patent number: 4003851
    Abstract: An alumina catalyst support substantially free of thermal skrinkage and having desirable physical properties is disclosed which is obtained by heating an alumina extrudate in a zone heated by direct fire to 1800.degree.-2600.degree. F. with combustion gases therein until less than 5% shrinkage when exposed to 1800.degree. F. for 24 hours is obtained. Promoted supports as effective shrinkfree catalysts and the method therefor are also disclosed.
    Type: Grant
    Filed: March 12, 1975
    Date of Patent: January 18, 1977
    Assignee: American Cyanamid Company
    Inventors: Robert Henry Ebel, Louis Leonard Lento, Jr.
  • Use of diepoxides in polythiodiethanol millable gums
    Patent number: 4000213
    Abstract: Polythioether polyols based on a major proportion of thiodiethanol and chain-extended by reaction with a diepoxide provide millable, sulfur-vulcanizable elastomeric compositions that provide, when vulcanized, good low temperature flexibility and low oil swell.
    Type: Grant
    Filed: November 26, 1975
    Date of Patent: December 28, 1976
    Assignee: American Cyanamid Company
    Inventor: Eugene Yue Chieh Chang
  • Hydrodesulfurization catalysts supported on carbon
    Patent number: 3997473
    Abstract: A hydrodesulfurization catalyst consisting essentially of a carbon support carrying thereon at least 10 and up to 20 weight percent of a first metal selected from tungsten and molybdenum and from about 2 to 10 weight percent of a second metal selected from cobalt and nickel, said metals being in the form of their sulfides and said catalyst having an average pore radius of at least 25 angstrom units and a compacted bulk density of about 0.3-0.8 gram per cc. provide advantages in the hydrodesulfurization of petroleum residuum.
    Type: Grant
    Filed: January 14, 1975
    Date of Patent: December 14, 1976
    Assignee: American Cyanamid Company
    Inventors: Joseph Lawrence Schmitt, Jr., George Augustus Castellion
  • Hydrotreating of petroleum distillates using shaped catalyst particles
    Patent number: 3990964
    Abstract: There is disclosed a hydrotreating process for petroleum distillate which comprises contacting the distillate with catalyst particles of special shape characteristics in the presence of hydrogen at elevated temperature and pressure.
    Type: Grant
    Filed: May 27, 1975
    Date of Patent: November 9, 1976
    Assignee: American Cyanamid Company
    Inventor: William Roy Gustafson
  • Single phase extrusion of acrylic polymer and water
    Patent number: 3991153
    Abstract: There is disclosed an improvement in the continuous melt extrusion of a refractory polymer and its melt assistant by which a porous plug of the composition being extruded is formed between the compressing zone and the melting zone of the extruder so as to prevent loss of vaporized melt assistant by backward escape through the feed inlet.
    Type: Grant
    Filed: June 24, 1975
    Date of Patent: November 9, 1976
    Assignee: American Cyanamid Company
    Inventors: George K. Klausner, Robert P. Kreahling, Vinod T. Sinha
  • Stabilized Mannich base solutions
    Patent number: 3988277
    Abstract: Aqueous solutions of Mannich bases of polyvinylamides are stabilized against viscosity increase and gelation by addition thereto of an effective amount of a formaldehyde scavenger.
    Type: Grant
    Filed: November 21, 1974
    Date of Patent: October 26, 1976
    Assignee: American Cyanamid Company
    Inventors: Charles Richard Witschonke, Robert Rabinowitz
  • Catalysts based on carbon supports
    Patent number: 3978000
    Abstract: Carbon particulates comprising carbon black spheres and a carbon binder having large pores as well as desirable pore size distribution are disclosed which serve as catalyst supports. The support carrying an effective amount of an activator is an active catalyst composition for a variety of reactions including reduction reactions.
    Type: Grant
    Filed: March 19, 1975
    Date of Patent: August 31, 1976
    Assignee: American Cyanamid Company
    Inventors: Joseph Lawrence Schmitt, Jr., Philip Leroy Walker, Jr., George Augustus Castellion
  • Printing process for acrylic fibers
    Patent number: 3976425
    Abstract: A process for printing acrylic fiber substantially free of acid dye sites with a printing paste containing a monosulfonic acid dye having an inorganicity/organicity ratio of less than about 4 and thereafter steaming the printed fiber to fix the dye is disclosed.
    Type: Grant
    Filed: December 13, 1973
    Date of Patent: August 24, 1976
    Assignee: American Cyanamid Company
    Inventors: Eichiro Ueno, Hideo Kawasaki, Syozo Shigita
  • Process for producing antistatic acrylic fibers
    Patent number: 3976738
    Abstract: Acrylic fibers have a decreased tendency to accumulate static charges when the spinning solution from which the fibers are spun has incorporated therein a polymer of tetrohydrofuran, which polymer remains durably adhered to the formed fiber.
    Type: Grant
    Filed: December 13, 1973
    Date of Patent: August 24, 1976
    Assignee: American Cyanamid Company
    Inventors: Kunio Tanahashi, Yukitoshi Nariai
  • Shaped catalyst particles
    Patent number: 3966644
    Abstract: Shaped catalyst particles are described which are particularly useful in hydrocarbon conversion processes and, in particular, in processes which are influenced by mass transfer such as the trickle bed hydrogenation process and hydrotreating of residuum.
    Type: Grant
    Filed: September 24, 1974
    Date of Patent: June 29, 1976
    Assignee: American Cyanamid Company
    Inventor: William Roy Gustafson
  • Process for printing a fiber product containing acrylic fibers and cellulosic fibers
    Patent number: 3961883
    Abstract: The invention is concerned with printing fabrics containing (a) acrylic fibers and/or modacrylic fibers having acidic dyesites but free of basic dyesites and (b) cellulosic fibers with a printing paste containing (A) an acid dye containing a single sulfonic acid group and having an inorganicity/organicity ratio below 4 for dyeing the acrylic or modacrylic fibers and (B) a direct or reactive dye for dyeing the cellulosic fibers.
    Type: Grant
    Filed: October 31, 1973
    Date of Patent: June 8, 1976
    Assignee: American Cyanamid Company
    Inventors: Eichiro Ueno, Hideo Kawasaki, Syozo Shigita
  • Printing process
    Patent number: 3959836
    Abstract: In the printing of fiber assemblages containing acrylic fibers dyeable with cationic dyes and blend fibers dyeable with anionic dyes, there is disclosed a process for printing with a printing paste containing a cationic and a anionic dye which comprises preparing the printing paste so as to contain specific amounts of lignin sulfonic acid or a soluble salt thereof, printing the fiber assemblage with said paste, and thereafter steaming the printed assemblage to fix the dyes thereon.
    Type: Grant
    Filed: December 13, 1973
    Date of Patent: June 1, 1976
    Assignee: American Cyanamid Company
    Inventors: Eichiro Ueno, Hideo Kawasaki, Syozo Shigita
  • Polyquaternary flocculants
    Patent number: RE28808
    Abstract: Polyquaternary flocculants of average molecular weight, in excess of 10,000 are prepared by reacting a secondary amine with an epihalohydrin or diepoxide for use in flocculation of aqueous systems where ordinary cationic flocculants cannot be used.
    Type: Grant
    Filed: March 6, 1974
    Date of Patent: May 11, 1976
    Assignee: American Cyanamid Company
    Inventors: Hans Peter Panzer, Kenneth Wayne Dixon