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Colleen C Nagel, James G Bentsen, John L Dektar, Cary A Kipke, Masao Yafuso, Alan R Katritzky: Sensors and methods for sensing. Minnesota Mining and Manufacturing Company, Gary L Griswold, Walter N Kirn, F Andrew Ubel, April 25, 1995: US05409666 (44 worldwide citation)

A sensor for measuring the concentration of an analyte in a medium is disclosed. In one embodiment, the sensor comprises a sensing element including a matrix material and, covalently bonded thereto, one or more monomeric indicator components each of which is capable of providing a first emitted sign ...


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Alan R Katritzky, Larry R Krepski, Jerald K Rasmussen, Steven M Heilmann, Richard D Tarr: Polypyridinium. Minnesota Mining and Manufacturing Company, Donald M Sell, Walter N Kirn, Lorraine R Sherman, June 20, 1989: US04841021 (26 worldwide citation)

A novel class of polymers comprises one or more dipyridinium units, having the formula ##STR1## contained within the main polymer backbone where Ar.sup.1, Ar.sup.2, and Ar.sup.3 are aromatic or heteroaromatic nuclei each of which can consist of one ring or two fused or catenated rings having 5 to 12 ...


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Michael Siskin, Alan R Katritzky, Glen B Brons: Process for converting and upgrading organic resource materials in aqueous environments. Exxon Research & Engineering Co, Linda M Scuorzo, Maurice L Williams, August 16, 1994: US05338442 (23 worldwide citation)

The invention is a process for the aqueous conversion and upgrading of organic resource materials carried out by contacting organic resource materials selected from the group consisting of coal, shale, coal liquids, shale oil, and bitumen with liquid water in the absence of externally supplied hydro ...


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Colleen C Nagel, James G Bentsen, Masao Yafuso, Alan R Katritzky, John L Dektar, Cary A Kipke: Sensors and methods for sensing. Minnesota Mining and Manufacturing Company, Gary L Griswold, Walter N Kirn, F Andrew Ubel, March 12, 1996: US05498549 (22 worldwide citation)

A sensor for measuring the concentration of an analyte in a medium is disclosed. In one embodiment, the sensor comprises a sensing element including a matrix material and, covalently bonded thereto, one or more monomeric indicator components each of which is capable of providing a first emitted sign ...


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Jerald K Rasmussen, Alan R Katritzky, Larry R Krepski, Howell K Smith II, Steven M Heilmann, Kumars Sakizadeh: Imidazolinone-containing copolymer. Minnesota Mining and Manufacturing Company, Donald M Sell, Lorraine R Sherman, November 15, 1988: US04785070 (22 worldwide citation)

A novel class of heterocyclic polymers and copolymers containing the 2-imidazolin-5-one ring structure is described. These polymers are prepared by reaction of bisazlactones and diamines, with or without suitable condensation monomers; the resultant polyamides are then thermally cyclodehydrated in t ...


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Alan R Katritzky, Larry R Krepski, Jerald K Rasmussen, Steven M Heilmann, Richard D Tarr: Polypyridinium copolymer. Minnesota Mining and Manufacturing Company, Donald M Sell, Walter N Kirn, Lorraine R Sherman, February 6, 1990: US04898923 (18 worldwide citation)

A novel class of polymers comprises one or more dipyridinium units, having the formula ##STR1## contained within the main polymer backbone where Ar.sup.1, Ar.sup.2, and Ar.sup.3 are aromatic or heteroaromatic nuclei each of which can consist of one ring or two fused or catenated rings having 5 to 12 ...


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Jerald K Rasmussen, Alan R Katritzky, Larry R Krepski, Howell K Smith II, Steven M Heilmann, Kumars Sakizadeh: Imidazolinone-containing polymer and copolymer. Minnesota Mining and Manufacturing Company, Donald M Sell, James A Smith, Lorraine R Sherman, May 19, 1987: US04667012 (15 worldwide citation)

A novel class of heterocyclic polymers and copolymers containing the 2-imidazolin-5-one ring structure is described. These polymers are prepared by reaction of bisazlactones and diamines, with or without suitable condensation monomers; the resultant polyamides are then thermally cyclodehydrated in t ...


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William J Schultz, Alan R Katritzky: Polymers containing 2,5-oxolanylene segments. Minnesota Mining and Manufacturing Co, Cruzan Alexander, Donald M Sell, James V Lilly, December 7, 1982: US04362785 (13 worldwide citation)

Polymers containing recurring 2,5-oxolanylene units wherein at least 60 percent of the units are joined directly to one another so as to provide segments consisting of at least 6 of said units.