Patents by Inventor Hans P. Panzer

Hans P. Panzer 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: 5368781
    Abstract: The present invention discloses a tunable, radiation filter comprising a highly ordered crystalline array of microparticles fixed in a polymerized hydrogel.
    Type: Grant
    Filed: November 10, 1993
    Date of Patent: November 29, 1994
    Assignee: Cytec Technology Corp.
    Inventors: Gottfried Haacke, Hans P. Panzer, Lino G. Magliocco, Sanford A. Asher
  • Patent number: 5342552
    Abstract: The present invention discloses radiation filters comprising a highly ordered crystalline array of microparticles fixed in a polymerized hydrogel in which is contained simple sugars or polyhydric alcohols to provide additional low temperature stability.
    Type: Grant
    Filed: October 23, 1990
    Date of Patent: August 30, 1994
    Assignee: CYTEC Technology Corp.
    Inventors: Hans P. Panzer, Lino Giovanni
  • Patent number: 5338492
    Abstract: The present invention discloses radiation filters comprising a highly ordered crystalline array of microparticles fixed in a polymerized hydrogel.
    Type: Grant
    Filed: November 20, 1992
    Date of Patent: August 16, 1994
    Assignee: CYTEC Technology Corp.
    Inventors: Hans P. Panzer, Lino Giovanni, Martin L. Cohen, Wei S. Yen
  • Patent number: 5330685
    Abstract: The present invention discloses satellite peak free radiation filters comprising a highly ordered crystalline array of microparticles fixed in a polymerized hydrogel.
    Type: Grant
    Filed: January 3, 1991
    Date of Patent: July 19, 1994
    Assignee: American Cyanamid Company
    Inventors: Hans P. Panzer, Lino Giovanni
  • Patent number: 5266238
    Abstract: The present invention discloses a tunable, radiation filter comprising a highly ordered crystalline array of microparticles fixed in a polymerized hydrogel.
    Type: Grant
    Filed: December 24, 1990
    Date of Patent: November 30, 1993
    Assignee: American Cyanamid Company
    Inventors: Gottfried Haacke, Hans P. Panzer, Lino G. Magliocco, Sanford A. Asher
  • Patent number: 5030340
    Abstract: A process for the recovery of mineral values from base metal and precious metal ores is disclosed. Specifically, a froth flotation process is disclosed which comprises contacting an aqueous ore slurry with an effective amount of a dihydroxyalkyl group containing polysaccharide, a mineral collector and a frothing agent.
    Type: Grant
    Filed: June 8, 1990
    Date of Patent: July 9, 1991
    Assignee: American Cyanamid Company
    Inventors: Hans P. Panzer, Michael Peart
  • Patent number: 4853114
    Abstract: A process for the recovery of mineral values from base metal ores is disclosed. Specifically, a froth flotation process is disclosed which comprises contacting an aqueous ore slurry with an effective amount of hemicellulose, a mineral collector and a frothing agent.
    Type: Grant
    Filed: March 3, 1989
    Date of Patent: August 1, 1989
    Assignee: American Cyanamid Copany
    Inventors: Norman J. Lewis, Hans P. Panzer
  • Patent number: 4717550
    Abstract: The iron content of Bayer process streams is reduced by contacting said stream with a tertiary hydroxyl-containing polyamine.
    Type: Grant
    Filed: October 9, 1986
    Date of Patent: January 5, 1988
    Assignee: American Cyanamid Company
    Inventors: Donald P. Spitzer, David W. Lipp, Alan S. Rothenberg, Hans P. Panzer
  • Patent number: 4410706
    Abstract: A method for preparing 2-alkenylimidazoles from readily available 2-alkylimidazoles or 2-alkylimidazolines by dehydrogenating the 2-alkylimidazole or 2-alkylimidazoline in the presence of a suitable dehydrogenation catalyst. The preferred method provides 2-vinylimidazole by dehydrogenating 2-ethylimidazole or 2-ethylimidazoline. The reaction is advantageously carried out in a vapor phase in the presence of an inert carrier gas using as preferred dehydrogenation catalysts, copper chromites and catalysts comprising one or more of the metals molybdenum, iron, cobalt, zinc or chromium on non-reducible oxide supports such as alumina or silica.
    Type: Grant
    Filed: May 19, 1982
    Date of Patent: October 18, 1983
    Assignee: American Cyanamid Company
    Inventors: Alan S. Rothenberg, Hans P. Panzer, Joseph L. Schmitt, Roger J. Card
  • Patent number: 4299939
    Abstract: 2-Alkenylimidazoles or the corresponding 1,3-dialkyl-2-alkenylimidazolium salts are homo- or copolymerized employing free radical catalysts.
    Type: Grant
    Filed: June 30, 1980
    Date of Patent: November 10, 1981
    Assignee: American Cyanamid Company
    Inventors: Hans P. Panzer, Alan S. Rothenberg, Paul F. Cutrufello
  • Patent number: 4282087
    Abstract: An iron ore is finely ground and slurried prior to being subjected to treatment with a selective flocculant for iron values. Subsequent to treatment, the iron values are allowed to settle into the underflow concentrate and be recovered. The selective flocculant employed is a hydroxymethylated polyacrylamide having a high molecular weight and a degree of hydroxymethylation in excess of about 50%.
    Type: Grant
    Filed: May 21, 1979
    Date of Patent: August 4, 1981
    Assignee: American Cyanamid Company
    Inventors: Richard M. Goodman, Hans P. Panzer
  • Patent number: 4274945
    Abstract: Selective flocculation of iron ores is accomplished through the employment of partially carboxylated polyacrylamides as the selective flocculant. The partially carboxylated polyacrylamides employed in the selective flocculation contain from about 20-65% carboxyl groups and are of a molecular weight in excess of one million. The selective flocculation process performs a separation of iron ores predominantly containing semitaconite, oxidized taconite and hematitic-goethitic jaspers from their associated siliceous gangue.
    Type: Grant
    Filed: November 7, 1979
    Date of Patent: June 23, 1981
    Assignee: American Cyanamid Company
    Inventors: Richard M. Goodman, Hans P. Panzer
  • Patent number: 4217443
    Abstract: Water-soluble cross-linked polysulfonium derivatives of poly(thiodiethanol) ethers are provided by reacting the ethers with difunctional sulfide-reactive alkylating agents.
    Type: Grant
    Filed: January 19, 1979
    Date of Patent: August 12, 1980
    Assignee: American Cyanamid Company
    Inventors: Hans P. Panzer, Anthony T. Coscia, Albert G. Robustelli
  • Patent number: 4217215
    Abstract: Water-soluble cross-linked cationic polysulfonium derivatives of poly(thiodiethanol)ethers are useful flocculants for suspended solids in aqueous medium.
    Type: Grant
    Filed: January 19, 1979
    Date of Patent: August 12, 1980
    Assignee: American Cyanamid Company
    Inventors: Hans P. Panzer, Anthony T. Coscia, Albert G. Robustelli
  • Patent number: 4217262
    Abstract: A cationic copolymer is prepared by first dissolving the total quantity of a suitable nonionic monomer in water. To this solution there is added up to about 95 mole percent of the total quantity of a suitable cationic monomer of greater reactivity than the nonionic monomer. The solution is then emulsified in a sufficient quantity of a hydrocarbon oil so as to provide a water-in-oil emulsion, with the water phase dispersed. Polymerization is then initiated with incremental additions of the withheld cationic monomer continuing throughout the copolymerization reaction. The resulting cationic copolymer exhibits a uniform distribution of cationic moieties along the polymer chain length which, in turn, has been shown to be a surprisingly more effective cationic copolymer when employed as a dewatering aid.
    Type: Grant
    Filed: May 10, 1979
    Date of Patent: August 12, 1980
    Assignee: American Cyanamid Company
    Inventors: Anthony T. Coscia, Hans P. Panzer, Michael N. D. O'Connor
  • Patent number: 4157442
    Abstract: 2-vinyl-2-tetrahydropyrimidines are prepared by cleaving 2-acylamidoethyl-2-tetrahydropyrimides at suitable temperature distilling the cleavage products, and recovering the desired product from the distillate.
    Type: Grant
    Filed: January 5, 1978
    Date of Patent: June 5, 1979
    Assignee: American Cyanamid Company
    Inventors: Hans P. Panzer, Kenny U. Acholonu
  • Patent number: 4152200
    Abstract: Use of a cationic copolymer prepared by incremental addition of a cationic monomer during the polymerization reaction of a nonionic monomer in the drainage of formed paper provides improved performance characteristics.
    Type: Grant
    Filed: December 15, 1977
    Date of Patent: May 1, 1979
    Assignee: American Cyanamid Company
    Inventors: Anthony T. Coscia, Hans P. Panzer, Michael N. D. O'Connor
  • Patent number: 4138563
    Abstract: 2-acylamidoethyl-2-tetrahydropyrimidines are disclosed which are desirable precursors for 2-vinyl-2-tetrahydropyrimidines.
    Type: Grant
    Filed: January 5, 1978
    Date of Patent: February 6, 1979
    Assignee: American Cyanamid Company
    Inventors: Hans P. Panzer, Kenny U. Acholonu
  • Patent number: 4137415
    Abstract: 2-vinyl-2-imidazolines are prepared by cleaving 2-acylamidoethyl-2-imidazolines at suitable temperature, distilling the cleavage products, and recovering the desired product from the distillate.
    Type: Grant
    Filed: January 5, 1978
    Date of Patent: January 30, 1979
    Assignee: American Cyanamid Company
    Inventors: Hans P. Panzer, Kenny U. Acholonu
  • Patent number: 4137416
    Abstract: 2-acylamidoethyl-2-imidazolines are disclosed which are desirable precursors for 2-vinyl-2-imidazolines.
    Type: Grant
    Filed: January 5, 1978
    Date of Patent: January 30, 1979
    Assignee: American Cyanamid Company
    Inventors: Hans P. Panzer, Kenny U. Acholonu