Patents by Inventor Ratan K. Chaudhuri
Ratan K. Chaudhuri 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: 5110585Abstract: The invention relates primarily to quaternized polycyclic compounds having the formula ##STR1## wherein m is an integer having a value of from 1 to 4; R is alkylene having from 3 to 8 carbon atoms and is optionally substituted with C.sub.1 to C.sub.4 alkyl; R.sub.2 together with the quaternary nitrogen, forms a 5 to 14 membered heterocyclic ring, said ring containing at least 2 hetero atoms selected from the group of nitrogen, sulfur and oxygen; R.sub.1 forms a double bond in the heterocyclic ring of the quaternized nitrogen or is alkyl, alkyleneoxyalkyl, alkylhydroxy, aryl, aralkyl, aralkenyl, alkaryl, alkylamidoalkyl and X.sup.- is an anion. The invention also relates to the preparation and use of said quaternized polycyclic compounds.Type: GrantFiled: March 1, 1989Date of Patent: May 5, 1992Assignee: ISP Investments Inc.Inventors: Ratan K. Chaudhuri, David J. Tracy, Robert B. Login, Michael W. Helioff
-
Patent number: 5093031Abstract: The invention relates to properties and uses of N-hydrocarbon substituted lactams, particularly N-alkyl substituted lactams having the formula ##STR1## wherein R' is a hydrophobic radical such as linear or branched chain alkyl group containing from 8 to 27 carbon atoms, most preferably micelle forming pyrrolidones having 12 to 16 carbon atoms in the R' group. The invention particularly relates to the uses of the N-hydrocarbon substituted lactams which involve surfactant properties, such as solubility, wetting, viscosity building, emulsifying and/or complexing properties.Type: GrantFiled: October 14, 1988Date of Patent: March 3, 1992Assignee: ISP Investments Inc.Inventors: Robert B. Login, Ratan K. Chaudhuri, Rama K. Haldar, Mohamed M. Hashem, Michael W. Helioff, David J. Tracy
-
Patent number: 5071463Abstract: An emulsifiable concentrate comprising an agriculturally active chemical, a surfactant, an organic diluent and a solvent having first and second components, the first component being capable of solubilizing the agriculturally active chemical and the second component in conjunction with the surfactant being effective to disperse the agriculturally active chemical. The inventive concentrate allows for high concentrations of the active ingredient, exhibits excellent stability and produces highly stable compositions upon dilution with water.Type: GrantFiled: December 11, 1989Date of Patent: December 10, 1991Assignee: ISP Investments Inc.Inventors: Kolazi S. Narayanan, Ratan K. Chaudhuri, Manilal Dahanayake
-
Patent number: 5066709Abstract: This invention relates to superior bioadhesive compositions having time extended adhesive properties comprising a non-toxic carrier and a polymer having between about 45 and about 70 weight % of units having the structure ##STR1## between about 50 and about 30 weight % of units having the structure ##STR2## and 2 to 7 weight % of an amine salt containing a lactam functionally derived from A and/or B, wherein R is hydrogen, alkoxy, phenyl, carboxy or --N lactam having from 3 to 6 carbon atoms; R.sub.1 is C.sub.1 to C.sub.6 alkylene and R.sub.2 is C.sub.2 to C.sub.4 alkylene; said copolymer having a number average molecular weight of about 40,000 to about 500,000 and a relatively small particle size. The invention also relates to the method of synthesizing and using the above composition.Type: GrantFiled: September 20, 1990Date of Patent: November 19, 1991Assignee: GAF Chemicals CorporationInventors: Ratan K. Chaudhuri, Rama K. Haldar, Balgopal Gangadharan
-
Patent number: 5055046Abstract: This invention relates to superior bioadhesive compositions having time extended adhesive properties comprising a non-toxic carrier and a polymer having between about 45 and about 70 weight % of units having the structure ##STR1## between about 50 and about 30 weight % of units having the structure ##STR2## and 2 and 7 weight % of an amine salt containing a lactam functionality derived from A and/or B, wherein R is hydrogen, alkoxy, phenyl, carboxyl or --N lactam having from 3 to 6 carbon atoms; R.sub.1 is C.sub.1 to C.sub.6 alkylene and R.sub.2 is C.sub.2 to C.sub.4 alkylene; said copolymer having a number average molecular weight of about 40,000 to about 500,000 and a relatively small particle size. The invention also relates to the method of synthesizing and using the above composition.Type: GrantFiled: April 8, 1991Date of Patent: October 8, 1991Assignee: ISP Investments Inc.Inventors: Ratan K. Chaudhuri, Rama K. Haldar, Balgopal Gangadharan
-
Patent number: 5011941Abstract: The invention relates primarily to quaternized compounds having the formula ##STR1## wherein n and n' are each independently integers having a value of from 1 to 25; p is an integer having a value of from 1 to 4; Y and Y' are each independently H or CH.sub.3 ; R is linear alkyl, alkenyl, or amidoalkyl having from 8 to 22 carbon atoms and is optionally substituted with C.sub.1 to C.sub.4 alkyl; Z is linear alkylene having from 3 to 8 carbon atoms and is optionally substituted with lower alkyl and A.sup.- is an anion.Type: GrantFiled: September 14, 1990Date of Patent: April 30, 1991Assignee: GAF Chemicals CorporationInventors: Ratan K. Chaudhuri, David J. Tracy, Robert B. Login
-
Patent number: 5008104Abstract: The invention relates primarily to quaternized compounds having the formula ##STR1## wherein n and n' are each independently integers having a value of from 1 to 25; p is an integer having a value of from 1 to 4; Y and Y' are each independently H or CH.sub.3 ; R is linear alkyl, alkenyl, or amidoalkyl having from 8 to 22 carbon atoms and is optionally substituted with C.sub.1 to C.sub.4 alkyl; Z is linear alkylene having from 3 to 8 carbon atoms and is optionally substituted with lower alkyl and A.sup.- is an anion.Type: GrantFiled: June 22, 1989Date of Patent: April 16, 1991Assignee: GAF Chemicals CorporationInventors: Ratan K. Chaudhuri, David J. Tracy, Robert B. Login
-
Patent number: 4980419Abstract: The invention relates to polymers containing a lactam functionality and having in its molecule repeating units of the general formula: ##STR1## wherein R.sup.1 is C.sub.1 to C.sub.18 alkyl;R.sup.2 is oxygen, sulfur or amino;R.sup.3 is alkylene having 3 to 6 carbon atoms optionally substituted with lower alkyl;Z is hydrogen, an alkali metal, an alkaline earth metal or ammonia;n has a value of from 30 to 3,500 andt has a value of from 2 to 8;and to the use and synthesis of said polymer.Type: GrantFiled: July 3, 1989Date of Patent: December 25, 1990Assignee: GAF Chemicals CorporationInventor: Ratan K. Chaudhuri
-
Patent number: 4910247Abstract: A composition containing an adhesive suitable for affixing dentures or ostomy devices to a mucous membrane, which adhesive is a mixture composed of(a) 75-25 wt. % of a blend comprising a divalent calcium salt and a monovalent sodium salt of a lower alkyl vinyl ether/maleic acid copolymer wherein the concentration of Ca is between about 10 and 15 wt. % of the blend; Na is between about 1.5 and about 4 wt. % of the blend and --COOH is between about 9 and about 25 wt. % of the blend;(b) 0-10 wt. % of a lower alkyl vinyl ether/maleic acid auxiliary metal salt wherein said metal is divalent magnesium and/or monovalent potassium and wherein said auxiliary metal represents between about 1.5 and about 15 wt. % of said auxiliary metal salt compound and(c) 25-75 wt. % of a stearic acid metal salt wherein said metal salt is magnesium stearate containing from 0% to about 75% sodium stearate.The invention also relates to the use of said composition as an adhesive used in association with mucous membranes.Type: GrantFiled: March 27, 1989Date of Patent: March 20, 1990Assignee: GAF Chemicals CorporationInventors: Rama K. Haldar, Balgopal Gangadharan, Ratan K. Chaudhuri
-
Patent number: 4886890Abstract: This invention relates to quaternary compounds having the formula ##STR1## wherein W.sup.- is an anion; m and n are integers having a value of from 1 to 4; R is alkylene having from 3 to 8 carbon atoms; R.sub.1 is a radical having from 8 to 25 carbon atoms and is selected from the group of alkyl, alkenyl and alkoxy alkylene and each of R.sub.2, R.sub.3 and R.sub.4 is a radical having from 1 to 25 carbon atoms and is alkyl, alkoxy or ##STR2## where p has a value of from 1 to 4 and X is hydrogen or methyl. The invention also relates to the preparation and use of said diquaternized compounds.Type: GrantFiled: September 29, 1988Date of Patent: December 12, 1989Assignee: GAF CorporationInventors: Ratan K. Chaudhuri, David J. Tracy, Robert B. Login
-
Patent number: 4883655Abstract: The invention relates primarily to quaternized polycyclic compounds having the formula ##STR1## wherein m is an integer having a value of from 1 to 4; R is alkylene having from 3 to 8 carbon atoms and is optionally substituted with C.sub.1 to C.sub.4 alkyl; R.sub.2 together with the quaternary nitrogen, forms a 5 to 14 membered heterocyclic ring, said ring containing from 1 to 2 hetero atoms selected from the group of nitrogen, sulfur and oxygen; R.sub.1 forms a double bond in the heterocyclic ring of the quaternized nitrogen or is alkyl, alkyleneoxyalkyl, alkylhydroxy, aryl, aralkyl, aralkenyl, alkaryl, alkylamidoalkyl and X.sup.- is a chloride, bromide or iodide anion. The invention also relates to the preparation and use of said quaternized polycyclic compounds.Type: GrantFiled: August 28, 1987Date of Patent: November 28, 1989Assignee: GAF CorporationInventors: Robert B. Login, Ratan K. Chaudhuri, David J. Tracy, Michael W. Helioff
-
Patent number: 4848377Abstract: An article of manufacture comprising an absorbent hair wrapping material coated or impregnated with a hair structure altering, water soluble solution and the process of employing the wrapping. The hair wrapping material is capable of retaining between about 5 and about 15 times its weight of water and a water soluble hair reducing lotion. The water soluble hair reducing lotion contains one of an N--C.sub.8 to C.sub.22 alkyl lactam conditioner or an N-- quaternized amino lactam.Type: GrantFiled: October 8, 1987Date of Patent: July 18, 1989Assignee: GAF CorporationInventors: Carmen D. Bires, Michael W. Helioff, Ratan K. Chaudhuri
-
Patent number: 4837013Abstract: The invention relates primarily to quaternized compounds having the formula ##STR1## wherein m is an integer having a value of from 1 to 4; R is alkylene having from 3 to 8 carbon atoms and is optionally substituted with C.sub.1 to C.sub.4 alkyl; R.sub.4 is alkylene having from 1 to 4 carbon atoms, phenyl or naphthyl optionally substituted with lower alkyl; Y is ##STR2## wherein R.sub.6 is hydrogen or lower alkyl; R.sub.7 is alkyl of from 1 to 30 carbon atoms; R.sub.2 and R.sub.3 are each independently selected from the group of --R.sub.4 --Y--R.sub.7 alkyl, alkyleneoxyalkyl, alkylhydroxy, aryl, aralkyl, aralkenyl, alkaryl, and alkyleneamidoalkyl radicals, said groups each having from 1 to 30 carbon atoms and at least one of R.sub.7, R.sub.2 and R.sub.3 having at least 8 carbon atoms and X.sup.-- is a chloride, bromide or iodide anion. The invention also relates to the preparation and use of said quaternized compounds.Type: GrantFiled: August 28, 1987Date of Patent: June 6, 1989Assignee: GAF CorporationInventors: Robert B. Login, Ratan K. Chaudhuri, David J. Tracy, Michael W. Helioff
-
Patent number: 4834970Abstract: The invention relates primarily to quaternized compounds having the formula ##STR1## wherein m is an integer having a value of from 1 to 4; R is alkylene having from 3 to 8 carbon atoms and is optionally substituted with C.sub.1 to C.sub.4 alkyl; R.sub.1, R.sub.2 and R.sub.3 are each independently selected from the group of alkyl, alkyl oxide, alkylhydroxy, alkoxy, aryl, aralkyl, alkaryl, and alkyl amidoalkyl radicals, said groups each having from 1 to 30 carbon atoms and at least one of R.sub.1, R.sub.2 and R.sub.3 is a radical having from 8 to 30 carbon atoms; and X.sup.- is a chloride, bromide or iodide anion. The invention also relates to the preparation and use of said quaternized compounds.Type: GrantFiled: June 29, 1987Date of Patent: May 30, 1989Assignee: GAF CorporationInventors: Robert B. Login, Ratan K. Chaudhuri, David J. Tracy, Michael W. Helioff
-
Patent number: 4830850Abstract: The invention relates primarily to quaternized compounds having the formula ##STR1## wherein m and p are each integers having a value of from 1 to 4; R is alkylene having from 3 to 8 carbon atoms and is optionally substituted with C.sub.1 to C.sub.4 alkyl; R.sub.1 is alkyl or alkenyl having from 1 to 30 carbon atoms; R.sub.2 and R.sub.3 are each independently selected from the group of --(CH.sub.2).sub.p OR.sub.1, alkyl, alkylhydroxy, aryl, aralkyl, aralkenyl, alkaryl, and alkylene amidoalkyl radicals, said R.sub.2 and R.sub.3 groups having from 1 to 30 carbon atoms and at least one of R.sub.1, R.sub.2 and R.sub.3 is a radical having from 8 to 30 carbon atoms; and X.sup.- is a chloride, bromide or iodide anion. The invention also relates to the preparation and use of said quaternized compounds.Type: GrantFiled: August 28, 1987Date of Patent: May 16, 1989Assignee: GAF CorporationInventors: Robert B. Login, Ratan K. Chaudhuri, David J. Tracy, Michael W. Helioff
-
Patent number: 4808569Abstract: The invention relates to a quaternized fragrance extender having the formula ##STR1## wherein n is an integer having a value of from 1 to 3; R is alkylene containing from 3 to 6 carbon atoms and is optionally substituted with lower alkyl; R.sub.1 is alkyl containing from 8 to 22 carbon atoms; R.sub.2 and R.sub.3 are each independently alkyl containing from 1 to 22 carbon atoms and X.sup.- is an anion which quaternized compound is capable of complexing with volatile, odoriferous compounds of between 3 and 60 carbon atoms having an acidic hydrogen atom in its structure and to the complexed compound formed and the use of said complexed compound in perfume and other commercial products including cosmetics, cleaning agents, paints, soaps, deodorants, plastics and rubbers.Type: GrantFiled: October 22, 1987Date of Patent: February 28, 1989Assignee: GAF CorporationInventors: Ratan K. Chaudhuri, Michael W. Helioff, Robert B. Login
-
Patent number: 4732990Abstract: The invention relates primarily to quaternized compounds having the formula ##STR1## wherein m is an integer having a value of from 1 to 4; R is alkylene having from 3 to 8 carbon atoms and is optionally substituted with C.sub.1 to C.sub.4 alkyl; R.sub.1, R.sub.2 and R.sub.3 are each independently selected from the group of alkyl, alkyl oxide, alkylhydroxy, alkoxy, aryl, aralkyl, alkaryl, and alkyl amidoalkyl radicals, said groups each having from 1 to 30 carbon atoms and at least one of R.sub.1, R.sub.2 and R.sub.3 is radical having from 8 to 30 carbon atoms; and X.sup.- is a chloride, bromide or iodide anion. The invention also relates to the preparation and use of said quaternized compounds.Type: GrantFiled: October 24, 1986Date of Patent: March 22, 1988Assignee: GAF CorporationInventors: Robert B. Login, Ratan K. Chaudhuri, David J. Tracy, Michael W. Helioff
-
Patent number: 4719287Abstract: The extraction of water soluble antibiotics containing a phenolic or carboxylic group from an aqueous solution or fermentation broth using a N--C.sub.8 --C.sub.14 alkyl pyrrolidone extractant and the process involving the extraction of said antibiotic.Type: GrantFiled: February 12, 1987Date of Patent: January 12, 1988Assignee: GAF CorporationInventors: Robert B. Login, Ratan K. Chaudhuri
-
Patent number: 4713463Abstract: The single stage process of reacting a lactam with an epihalohydrin in the presence of alkali metal hydroxide and between about 10.sup.-1 and about 10.sup.-4 molar concentration based on lactam of a phase transfer catalyst selected from the group of tetraalkyl ammonium hydrogen sulfate and tetraalkyl ammonium halide.Type: GrantFiled: October 24, 1986Date of Patent: December 15, 1987Assignee: GAF CorporationInventors: Ratan K. Chaudhuri, Robert B. Login, David J. Tracy