Patents by Inventor Ponnampalam Mathiaparanam
Ponnampalam Mathiaparanam 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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Publication number: 20090156864Abstract: The invention teaches novel process steps for the rapid high yield manufacture of diphenylamines of the formula wherein R1 is selected from hydrogen, alkyl, and aryl; wherein each R2 and R3 is the same or different and each is independently selected from hydrogen, alkyl, alkoxy, aralkyl, dialkylamino, alkylarylamino and substituted or unsubstituted aryl, the substituents on aryl being each independently selected from alkyl (C1-C8), alkoxy (C1-C8), aroxy, aralkoxy and halogen; wherein n and m are each independently an integer from 1 to 5. Diphenylamines are key intermediates for the production of leuco dyes used in pressure-sensitive and heat-sensitive imaging systems.Type: ApplicationFiled: February 19, 2009Publication date: June 18, 2009Applicant: Appleton Papers Inc.Inventor: Ponnampalam Mathiaparanam
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Patent number: 7294724Abstract: The invention teaches an improved process for the manufacture of useful fluoran dyes of the structure according to formula 1 comprising condensing in an alkanesulfonic acid or an arenesulfonic acid to acid according to formula 2 with an aminodiphenylamine of formula 3 wherein R, R1-R6 are as defined in the specification.Type: GrantFiled: August 11, 2005Date of Patent: November 13, 2007Assignee: Appleton Papers Inc.Inventor: Ponnampalam Mathiaparanam
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Publication number: 20070073086Abstract: The invention teaches novel process steps for the rapid high yield manufacture of diphenylamines of the formula wherein R1 is selected from hydrogen, alkyl, and aryl; wherein each R2 and R3 is the same or different and each is independently selected from hydrogen, alkyl, alkoxy, aralkyl, dialkylamino, alkylarylamino and substituted or unsubstituted aryl, the substituents on aryl being each independently selected from alkyl (C1-C8), alkoxy (C1-C8), aroxy, aralkoxy and halogen; wherein n and m are each independently an integer from 1 to 5. Diphenylamines are key intermediates for the production of leuco dyes used in pressure-sensitive and heat-sensitive imaging systems.Type: ApplicationFiled: September 28, 2005Publication date: March 29, 2007Applicant: Appleton Papers Inc.Inventor: Ponnampalam Mathiaparanam
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Publication number: 20070037989Abstract: The invention teaches an improved process for the manufacture of useful fluoran dyes of the structure according to formula 1 comprising condensing in an alkanesulfonic acid or an arenesulfonic acid to acid according to formula 2 with an aminodiphenylamine of formula 3 wherein R, R1 and R2 are each independently selected from alkyl(C1-C8), aryl or aralkyl; wherein aromatic ring in aryl or aralkyl may be unsubstituted or substituted with alkyl(C1-C8), alkoxy(C1-C8), or halogen; wherein R1—N—R2 may form pyrrolidinyl, piperidinyl and morpholinyl ring moieties; wherein R3, R4, R5 and R6 are each independently selected from hydrogen, alkyl, cycloalkyl, alkoxy, halogen, aryl or aralkyl; wherein the aromatic ring in aryl or aralkyl may be unsubstituted or unsubstituted with alkyl, alkoxy or halogen; said alkyl or alkoxy moieties being from one to eight carbons; or R3 and R4 or R4 and R5, or R5 and R6, may form alicyclic or aromatic ring structures.Type: ApplicationFiled: August 11, 2005Publication date: February 15, 2007Applicant: Appleton Paper Inc.Inventor: Ponnampalam Mathiaparanam
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Patent number: 7125824Abstract: A linerless label system comprising pressure adhesive coating, release coating and thermal imaging coating is described. The thermal imaging coating contains as one of its components the compounds of the formula (I) wherein R1 and R2 are selected from methyl, ethyl, aryl, aryl substituted with methyl, ethyl, methoxy, ethoxy or halogen, benzyl or benzyl with phenyl substituted with methyl, ethyl, methoxy, ethoxy or halogen, R3,R4,R5 and R6 are selected from hydrogen, halogen, methyl, ethyl, methoxy, ethoxy, phenyl, R7 and R8 are each independently selected from methyl or ethyl, R9 is selected from hydrogen, methoxy or ethoxy, R10 is selected from hydrogen, dimethylamino or diethylamino, R11 is methyl. The imaged linerless label according to the invention has been a bar reflectance of less than 20 at 670 nanometers, a print control contrast signal of at least 80 and a BNL background of at least 75%.Type: GrantFiled: May 19, 2004Date of Patent: October 24, 2006Assignee: Appleton Papers Inc.Inventors: Ponnampalam Mathiaparanam, Mark Robert Fisher, Stacey Ann Justa MacNeil
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Patent number: 6835691Abstract: The present invention is a novel thermally-responsive record material comprising a substrate having provided thereon in substantially contiguous relationship an electron donating dye precursor, an acidic developer material, a compound of the formula wherein R1, R2 and R3 are independently selected from hydrogen, alkyl, alkoxy, aryl, aralkyl, aralkoxy, halogen, and alkoxyalkoxy; wherein R4 is independently selected from alkoxyalkyl, alkoxyalkoxy, and aralkoxyalkoxy, and a suitable binder therefor. In the context of the present invention the alkyl moieties in the alkyl, aralkyl, aralkoxy, alkoxyalkyl, alkoxyalkoxy and aralkoxyalkoxy preferably are eight carbons or less, and more preferably from one through four carbons. Substituents on aryl moieties in aryl, aralkyl, aralkoxy, and aralkoxyalkoxy groups can include hydrogen, alkyl, alkoxy and halogen. The alkyl group in these substituents also is eight carbons or less, and more preferably from one through four carbons.Type: GrantFiled: March 18, 2003Date of Patent: December 28, 2004Assignee: Appleton Papers Inc.Inventors: Ponnampalam Mathiaparanam, Mark Robert Fisher
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Publication number: 20040234756Abstract: A linerless label system comprising pressure adhesive coating, release coating and thermal imaging coating is described.Type: ApplicationFiled: May 19, 2004Publication date: November 25, 2004Applicant: Appleton Papers Inc.Inventors: Ponnampalam Mathiaparanam, Mark Robert Fisher, Stacey Ann Justa MacNeil
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Publication number: 20030170435Abstract: The present invention is a novel thermally-responsive record material comprising a substrate having provided thereon in substantially contiguous relationship an electron donating dye precursor, an acidic developer material, a compound of the formula 1Type: ApplicationFiled: March 18, 2003Publication date: September 11, 2003Applicant: Appleton Papers Inc.Inventors: Ponnampalam Mathiaparanam, Mark Robert Fisher
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Patent number: 6566301Abstract: The present invention is a novel thermally-responsive record material comprising a substrate having provided thereon in substantially contiguous relationship an electron donating dye precursor, an acidic developer material, a compound of the formula wherein P is selected from wherein R1, R2 and R3 are independently selected from hydrogen, alkyl, alkoxy, aryl, aralkyl, aralkoxy, halogen, and alkoxyalkoxy; wherein R4 is independently selected from alkoxyalkyl, alkoxyalkoxy, and aralkoxyalkoxy, and a suitable binder therefor. In the context of the present invention the alkyl moieties in the alkyl, aralkyl, aralkoxy, alkoxyalkyl, alkoxyalkoxy and aralkoxyalkoxy preferably are eight carbons or less, and more preferably from one through four carbons. Substituents on aryl moieties in aryl, aralkyl, aralkoxy, and aralkoxyalkoxy groups can include hydrogen, alkyl, alkoxy and halogen.Type: GrantFiled: December 19, 2000Date of Patent: May 20, 2003Assignee: Appleton Papers Inc.Inventors: Ponnampalam Mathiaparanam, John Charles DeBraal, Mark Robert Fisher, Stacey Ann Justa MacNeil, Debra Arlene Berggren
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Patent number: 6559097Abstract: The present invention is a novel thermally-responsive record material comprising a substrate having provided thereon in substantially contiguous relationship an electron donating dye precursor, an acidic developer material, a compound of the formula wherein R1, R2 and R3 are independently selected from hydrogen, alkyl, alkoxy, aryl, aralkyl, aralkoxy, halogen, alkoxyalkoxy, and aralkoxyalkoxy; with the proviso that when R1, R2 and R3 are hydrogen, that R4 is not benzyloxyethoxy or alkyl-substituted benzyloxyethoxy; wherein R4 is independently selected from alkoxyalkyl, alkoxyalkoxy, and aralkoxyalkoxy, and a suitable binder therefor. In the context of the present invention the alkyl moieties in the alkyl, aralkyl, aralkoxy, alkoxyalkyl, alkoxyalkoxy and aralkoxyalkoxy preferably are eight carbons or less, and more preferably from one through four carbons. Substituents on aryl moieties in aryl, aralkyl, aralkoxy, and aralkoxyalkoxy groups can include hydrogen, alkyl, alkoxy and halogen.Type: GrantFiled: September 10, 2001Date of Patent: May 6, 2003Assignee: Appleton Papers Inc.Inventors: Ponnampalam Mathiaparanam, Mark Robert Fisher, John Charles DeBraal
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Patent number: 6429341Abstract: The present invention is a novel class of compounds useful in useful in thermally-responsive record material of the type comprising a substrate having provided thereon in substantially contiguous relationship an electron donating dye precursor, and an acidic developer material. The novel compound of the invention is a compound of the formula wherein P is selected from wherein R1, is selected from hydrogen, alkoxy, and aralkoxy; wherein R2 is aralkoxyalkoxy when P is phenyl, and R2 is selected from aralkoxyalkoxy or alkoxyalkoxy when P is naphthyl. Said alkyl moieties are each independently from one to eight carbons, said aryl moieties each independently being unsubstituted or substituted by alkyl (C1-C8), alkoxy (C1-C8) or halogen. The compounds of the invention enable manufacture of thermally responsive record material of the invention having the unexpected and remarkable properties of enhanced image intensity or density, and/or improved thermal response.Type: GrantFiled: January 4, 2001Date of Patent: August 6, 2002Assignee: Appleton Papers Inc.Inventor: Ponnampalam Mathiaparanam
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Publication number: 20020049138Abstract: The present invention is a novel thermally-responsive record material comprising a substrate having provided thereon in substantially contiguous relationship an electron donating dye precursor, an acidic developer material, a compound of the formula 1Type: ApplicationFiled: September 10, 2001Publication date: April 25, 2002Inventors: Ponnampalam Mathiaparanam, Mark Robert Fisher, John Charles DeBraal
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Publication number: 20020007091Abstract: The present invention is a novel class of compounds useful in useful in thermally-responsive record material of the type comprising a substrate having provided thereon in substantially contiguous relationship an electron donating dye precursor, and an acidic developer material.Type: ApplicationFiled: January 4, 2001Publication date: January 17, 2002Applicant: Appleton Papers Inc.Inventor: Ponnampalam Mathiaparanam
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Publication number: 20020006868Abstract: The present invention is a novel thermally-responsive record material comprising a substrate having provided thereon in substantially contiguous relationship an electron donating dye precursor, an acidic developer material, a compound of the formula 1Type: ApplicationFiled: December 19, 2000Publication date: January 17, 2002Inventors: Ponnampalam Mathiaparanam, John Charles DeBraal, Mark Robert Fisher, Stacey Ann Justa MacNeil, Debra Arlene Berggren
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Publication number: 20020002311Abstract: The present invention is a novel process, with or without solvent, for manufacture of compounds of the formula 1Type: ApplicationFiled: February 1, 2001Publication date: January 3, 2002Applicant: Appleton Papers Inc.Inventors: Ponnampalam Mathiaparanam, Debra Arlene Berggren
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Patent number: 6323376Abstract: The present invention is a novel process, with or without solvent, for manufacture of compounds of the formula wherein P is selected from phenyl and naphthyl; wherein R1 and R2 and R3 are each independently selected from hydrogen, alkyl, alkoxy, aryl, aralkyl, aralkoxy, halogen, alkoxyalkoxy, and aralkoxyalkoxy; wherein R5 is selected from substituted or unsubstituted phenyl, and substituted or unsubstituted naphthyl, the substituents being each independently selected from alkyl (C1-C8), alkoxy (C1-C8), aroxy, aralkoxy (C1-C8) and halogen.Type: GrantFiled: February 1, 2001Date of Patent: November 27, 2001Assignee: Appleton Papers Inc.Inventors: Ponnampalam Mathiaparanam, Debra Arlene Berggren
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Patent number: 5229522Abstract: Novel bis-(indolyl)ethylenes, process for their production and record systems utilizing such bis-(indolyl)ethylene chromogens are described.Bis-(indolyl)ethylenes of the following general formula are prepared: ##STR1## wherein each L.sup.1 and L.sup.2 is the same or different and is each independently selected from indole moieties (J1) through (J4) (L.sup.1 need not be the same as L.sup.2), ##STR2## wherein Z is hydrogen, alkyl (C.sub.1 -C.sub.8), substituted or unsubstituted aryl, aralkyl, aroxyalkyl, alkoxyalkyl or halogen.Type: GrantFiled: September 4, 1990Date of Patent: July 20, 1993Assignee: Appleton Papers Inc.Inventor: Ponnampalam Mathiaparanam
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Patent number: 5218127Abstract: Preparation of novel mono(indolylethylenyl) phthalides is disclosed. Specifically, these compounds are chromogenic mono(indolylethylenyl)phthalides of the formula ##STR1## wherein A is as hereinafter defined and selected from moieties of the type ##STR2## wherein L is an indole moiety as hereinafter defined; wherein B is a moiety of the type ##STR3## as hereinafter defined. The process disclosed comprises condensing indolylethylene with a keto acid or its derivative and an electron acceptor in an organic solvent.Type: GrantFiled: November 6, 1992Date of Patent: June 8, 1993Assignee: Appleton Papers Inc.Inventor: Ponnampalam Mathiaparanam
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Patent number: 5200519Abstract: Preparation of novel mono(indolylethylenyl) phthalides is disclosed. Specifically, these compounds are chromogenic mono(indolylethylenyl)phthalides of the formula ##STR1## wherein A is as hereinafter defined and selected from moieties of the type ##STR2## wherein L is an indole moiety as hereinafter defined; wherein B is a moiety of the type ##STR3## as hereinafter defined. The process disclosed comprises condensing indolylethylene with a keto acid or its derivative and an electron acceptor in an organic solvent.Type: GrantFiled: January 3, 1992Date of Patent: April 6, 1993Assignee: Appleton Papers Inc.Inventor: Ponnampalam Mathiaparanam
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Patent number: 5157012Abstract: Pressure-sensitive and heat-sensitive record materials are described comprising a substrate, an acidic developer and chromogenic di-[bis-(indolyl) ethylenyl]tetrahalophthalides of the formula ##STR1## wherein each X.sup.1, S.sup.2, X.sup.3, and X.sup.4 is independently selected from chlorine or bromine;wherein each of R.sup.1 and R.sup.7 is independently selected from cycloalkyl, aralkyl, alkoxyalkyl, or aroxyalkyl;wherein each of R.sup.2 and R.sup.8 is independently selected from alkyl (C.sub.1 -C.sub.8) or aryl (substituted or unsubstituted);wherein each of R.sup.3, R.sup.4, R.sup.5, R.sup.6,R.sup.9, R.sup.10, R.sup.11, and R.sup.12 is independently selected from hydrogen alkyl (C.sub.1 -C.sub.8), cycloalkyl, aryl (substituted or unsubstituted), halogen, alkoxy (C.sub.1 -C.sub.8), aroxy, cycloalkoxy, dialkylamino including symmetrical and unsymmetrical alkyl (C.sub.1 -C.sub.Type: GrantFiled: July 24, 1990Date of Patent: October 20, 1992Assignee: Appleton Papers Inc.Inventors: Ponnampalam Mathiaparanam, Dean G. Dalebroux, Kenneth D. Glanz