Patents by Inventor Victor D. Papanu
Victor D. Papanu 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).
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Patent number: 6120908Abstract: A method is described for strengthening or restoring strength to a flat brittle oxide substrate which includes the steps of coating the edges of the brittle oxide substrate with a strengthening composition without coating a significate portion of the flat surfaces. The strengthen brittle oxide substrate such as glass and a window containing as the window pane the edge strengthen glass are also provided.Type: GrantFiled: August 31, 1998Date of Patent: September 19, 2000Assignee: Elf Atochem North America, Inc.Inventors: Victor D. Papanu, Stephen W. Carson, Scott J. Schwartz
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Patent number: 6013333Abstract: A method is described for strengthening or restoring strength to a brittle oxide substrate which includes the steps of coating the brittle oxide substrate with an aqueous solution containing a silane-based composition, and curing the coating to form a transparent layer on the brittle oxide substrate. Also disclosed are novel compositions used to coat brittle oxide substrates, and silane-coated brittle oxide containers.Type: GrantFiled: June 7, 1995Date of Patent: January 11, 2000Assignee: Elf Atochem North America, Inc.Inventors: Stephen W. Carson, Ryan R. Dirkx, Victor D. Papanu, Neil D. Conrad
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Patent number: 5567235Abstract: A method is described for strengthening or restoring strength to a brittle oxide substrate which includes the steps of coating the brittle oxide substrate with an aqueous solution containing a silane-based composition, and curing the coating to form a transparent layer on the brittle oxide substrate. Also disclosed are novel compositions used to coat brittle oxide substrates, and silane-coated brittle oxide containers.Type: GrantFiled: June 6, 1995Date of Patent: October 22, 1996Assignee: Elf Atochem North America, Inc.Inventors: Stephen W. Carson, Ryan R. Dirkx, Victor D. Papanu, Neal D. Conrad
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Patent number: 4994207Abstract: A die attach adhesive film having excellent die shear strength is provided by a polysiloxaneimide having a weight average molecular weight of at least 100,000 and a aromatic diamine segment with substituents in the meta position.Type: GrantFiled: March 9, 1989Date of Patent: February 19, 1991Assignee: National Starch and Chemical Investment Holding CorporationInventors: Robert Edelman, Victor D. Papanu
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Patent number: 4501847Abstract: The disclosure relates to pharmaceutically acceptable amide-imide derivatives of low molecular weight homopolymers of itaconic anhydride having antitumor activity.Type: GrantFiled: July 9, 1981Date of Patent: February 26, 1985Assignee: Monsanto CompanyInventor: Victor D. Papanu
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Patent number: 4315092Abstract: A polyacetal carboxylate is provided having the following empirical formula: ##STR1## where M is selected from the group consisting of akali metal, ammonium, tetra-alkyl ammonium groups and alkanol ammonium groups, and n averages at least 4. Such polyacetal carboxylates can be used as complexing agents and detergency builders.Type: GrantFiled: November 20, 1978Date of Patent: February 9, 1982Assignee: Monsanto CompanyInventors: Marvin M. Crutchfield, Victor D. Papanu, Craig B. Warren
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Patent number: 4302564Abstract: The alkali metal, ammonium and alkanol amine salts of acetal carboxylate polymers are known to be stable detergent builders and chelating agents which depolymerize in acid media making the polymer fragments more readily biodegradable in waste streams. Now, according to the present invention, the hydrolytic stability of an acetal carboxylate polymer can be controlled by bringing together under polymerization conditions an ester of glyoxylic acid and a polymerization initiator and adding to the termini of the resulting polymer end groups having substituents which are selected to be more electron withdrawing as the desired hydrolytic stability increases.Type: GrantFiled: June 5, 1980Date of Patent: November 24, 1981Assignee: Monsanto CompanyInventors: David R. Dyroff, Gary J. Lynch, Victor D. Papanu
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Patent number: 4233423Abstract: The alkali metal, ammonium and alkanol amine salts of polymeric acetal carboxylates are stable detergent builders and chelating agents. Now, in the improved process of the present invention for preparing an acetal carboxylate polymer wherein a glyoxylate ester and a polymerization initiator are brought together under polymerization conditions and a chemically stable end group is added to the termini of the resulting polymer to stabilize the polymer against rapid depolymerization in alkaline solution, the improvement comprises contacting the resulting polymer in the presence of an acid catalyst with a sufficient amount of an acetal having 3 to 20 carbon atoms to stabilize the resulting polymer against rapid depolymerization in alkaline solution, and an agent to remove liberated alcohol.Type: GrantFiled: November 5, 1979Date of Patent: November 11, 1980Assignee: Monsanto CompanyInventors: David R. Dyroff, Gary J. Lynch, Victor D. Papanu
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Patent number: 4226960Abstract: The alkali metal, ammonium and alkanol ammonium salts of polymeric acetal carboxylates are stable detergent builders under laundry use conditions but depolymerize at lower pH, making the polymer fragments more readily biodegradable in waste streams. Such polymeric acetal carboxylates can now be made by an improved process which includes the steps of bringing together in a reaction zone under polymerization conditions an ester of glyoxylic acid and a polymerization initiator, and adding an alkyl vinyl ether to the resulting polymer in the presence of a solvent having a dielectric constant of at least 15, such as an alkyl nitrile and a haloacetic acid catalyst, such as trifluoroacetic acid, to stabilize the polymer against rapid depolymerization in alkaline solution. The preferred solvent is acetonitrile.Type: GrantFiled: October 22, 1979Date of Patent: October 7, 1980Assignee: Monsanto CompanyInventors: David R. Dyroff, Victor D. Papanu
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Patent number: 4226959Abstract: The alkali metal, ammonium and alkanol ammonium salts of polymeric acetal carboxylates are stable detergent builders under laundry use conditions but depolymerize in acid media, making the polymer fragments more readily biodegradable in waste streams.Type: GrantFiled: October 22, 1979Date of Patent: October 7, 1980Assignee: Monsanto CompanyInventors: David R. Dyroff, Victor D. Papanu
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Patent number: 4225685Abstract: The alkali metal, ammonium and alkanol ammonium salts of polymeric acetal carboxylates are stable detergent builders under laundry use conditions but depolymerize in mildly acidic media, making the polymer fragments more readily biodegradable in waste streams. Such polymeric acetal carboxylates can now be made by a process which comprises bringing together in a reaction zone under polymerization conditions an ester of glyoxylic acid and a polymerization initiator, and adding to the resulting polymer an alkyl vinyl ether and an organoaluminum compound to stabilize the resulting polymer against rapid depolymerization in alkaline solution. The preferred alkyl vinyl ether is ethyl vinyl ether, and the preferred organoaluminum compounds are alkyl aluminum halides and trialkyl aluminum.Type: GrantFiled: June 18, 1979Date of Patent: September 30, 1980Assignee: Monsanto CompanyInventors: David R. Dyroff, Victor D. Papanu
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Patent number: 4224420Abstract: The alkali metal, ammonium and alkanol ammonium salts of polymeric acetal carboxylates are stable detergent builders under laundry use conditions but depolymerize in acid media, making the polymer fragments more readily biodegradable in waste streams. Such polymeric acetal carboxylates can now be made by a process which comprises bringing together in a reaction zone under polymerization conditions an ester of glyoxylic acid and a molecular sieve, and adding an alkyl vinyl ether to the resulting polymer in the presence of the molecular sieve to stabilize the polymer against rapid depolymerization in alkaline solution. The preferred alkyl vinyl ether is ethyl vinyl ether.Type: GrantFiled: June 18, 1979Date of Patent: September 23, 1980Assignee: Monsanto CompanyInventors: Victor D. Papanu, Charles J. Upton
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Patent number: 4219437Abstract: A detergent composition is provided which comprises at least 5 percent by weight of a surfactant selected from the group consisting of anionic, nonionic, zwitterionic, ampholytic and amphoteric surfactants; and at least 1 weight percent of a copolymer having the following general formula ##STR1## where Y is one or more comonomers selected from the group consisting of olefins and aldehydes having from 1 to about 3 carbon atoms; n averages at least 2; p is at least 1; and M is selected from the group consisting of alkali metal, ammonium and alkanol ammonium groups having 1 to about 4 carbon atoms in the alkyl chain; R.sub.1 and R.sub.2 are individually any chemically stable group which stabilize the polymer against rapid depolymerization in alkaline solution. The copolymers are stable under laundry use conditions, but depolymerize in acid media, making the fragments more readily biodegradable in waste streams.Type: GrantFiled: February 2, 1979Date of Patent: August 26, 1980Assignee: Monsanto CompanyInventor: Victor D. Papanu
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Patent number: 4204052Abstract: Copolymers of acetal carboxylates are provided which have the following empirical formula ##STR1## where Y is one or more comonomers randomly distributed in the copolymer; the product of n and q averages at least 4; p is at least 1; and M is selected from the group consisting of alkali metal, ammonium, alkyl groups having 1 to about 4 carbon atoms, and alkanol ammonium groups having 1 to about 4 carbon atoms in the alkyl chain. Such copolymers are useful as detergent builders to replace sodium tripolyphosphate (STP) in detergent formulations. The copolymers are stable under laundry use conditions, but depolymerize in acid media, making the fragments more readily biodegradable in waste streams.Type: GrantFiled: November 20, 1978Date of Patent: May 20, 1980Assignee: Monsanto CompanyInventors: Marvin M. Crutchfield, Victor D. Papanu, Craig B. Warren
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Patent number: 4182900Abstract: Ether carboxylates represented by the formula: ##STR1## wherein R.sub.1 and R.sub.2 are individually selected from the group consisting of alkyl containing up to 20 carbon atoms and M.sub.1 and M.sub.2 are individually selected from the group consisting of alkyl containing up to about 4 carbon atoms, are useful as intermediates to prepare the corresponding acid or alkali metal, ammonium and alkanol amine salts, which are useful as chelants, sequestrants and detergent builders.Type: GrantFiled: September 26, 1978Date of Patent: January 8, 1980Assignee: Monsanto CompanyInventors: Marvin M. Crutchfield, Victor D. Papanu, Charles J. Upton
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Patent number: 4169934Abstract: Copolymers of keto dicarboxylates are provided which have the following general formula ##STR1## WHERE Y is one or more comonomers; n averages at least 2; p is at least 1; and M is selected from the group consisting of alkali metal, ammonium, alkyl groups having 1 to about 4 carbon atoms, and alkanol amine groups having 1 to about 4 carbon atoms in the alkyl chain. Such copolymers are useful as detergent builders to replace sodium tripolyphosphate (STP) in detergent formulations. The copolymers are stable under laundry use conditions, but depolymerize in acid media, making the fragments more readily biodegradable in waste streams.Type: GrantFiled: April 3, 1978Date of Patent: October 2, 1979Assignee: Monsanto CompanyInventor: Victor D. Papanu
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Patent number: 4146495Abstract: Ether and acetal carboxylates useful as detergent builders to replace sodium tripolyphosphate (STP) in detergent formulations are known to the art. Certain polymeric polycarboxylates are also known to the art but all of these products suffer from either having poor builder properties or they are not readily biodegradable. According to the present invention, new and novel polyacetal carboxylates are provided which are stable under laundry use conditions, but depolymerize in acid media, making the fragments more readily biodegradable in waste streams.Type: GrantFiled: August 22, 1977Date of Patent: March 27, 1979Assignee: Monsanto CompanyInventors: Marvin M. Crutchfield, Victor D. Papanu, Craig B. Warren
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Patent number: 4144226Abstract: Ether and acetal carboxylates useful as detergent builders to replace sodium tripolyphosphate (STP) in detergent formulations are known to the art. According to the present invention, new and novel polymeric acetal carboxylates are provided which are stable under laundry use conditions, but depolymerize in acid media, making the polymer fragments more readily biodegradable in waste streams.Type: GrantFiled: August 22, 1977Date of Patent: March 13, 1979Assignee: Monsanto CompanyInventors: Marvin M. Crutchfield, Victor D. Papanu, Craig B. Warren