Patents by Inventor Steven J. Pachuta
Steven J. Pachuta 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: 20200023299Abstract: A method of making a fluorinated fibrous web, which method includes providing a nonwoven web 22 that contains polymeric fibers, creating a plasma that contains fluorine atoms at a first location 14, and contacting the nonwoven web with products from the plasma at a second location 26 remote from the first location 14. The method avoids exposure of the web to the plasma and hence expands the manufacturing processing window. Webs so fluorinated have a different C3F4H+ to C2F5+ ratio when compared to locally fluorinated webs having similar levels of surface fluorination. The remote fluorinated webs can be subsequently charged electrically to provide a good performing electret filter 40 suitable for use in an air purifying respirator 30. Webs fluorinated in accordance with this invention also may exhibit good performance even after being “aged” at high temperatures.Type: ApplicationFiled: September 30, 2019Publication date: January 23, 2020Inventors: Seth M. Kirk, Marvin E. Jones, Steven J. Pachuta, Andrew W. Chen, William P. Klinzing, Patrick J. Sager
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Patent number: 10464001Abstract: A method of making a fluorinated fibrous web, which method includes providing a nonwoven web 22 that contains polymeric fibers, creating a plasma that contains fluorine atoms at a first location 14, and contacting the nonwoven web with products from the plasma at a second location 26 remote from the first location 14. The method avoids exposure of the web to the plasma and hence expands the manufacturing processing window. Webs so fluorinated have a different C3F4H+ to C2F5+ ratio when compared to locally fluorinated webs having similar levels of surface fluorination. The remote fluorinated webs can be subsequently charged electrically to provide a good performing electret filter 40 suitable for use in an air purifying respirator 30. Webs fluorinated in accordance with this invention also may exhibit good performance even after being “aged” at high temperatures.Type: GrantFiled: November 21, 2016Date of Patent: November 5, 2019Assignee: 3M Innovative Properties CompanyInventors: Seth M. Kirk, Marvin E. Jones, Steven J. Pachuta, Andrew W. Chen, William P. Klinzing, Patrick J. Sager
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Patent number: 10035909Abstract: Compositions comprising surface-modified calcite nanoparticles dispersed in a curable resin and to coatings and fibrous composites incorporating such compositions are described. The nanocalcite particles have a high magnesium to calcium surface concentration ratio. The surface-modifying agents include a binding group ionically associated with the nanoparticles, and a compatiblizing segment compatible with the curable resin. The surface-modifying agent may also include a reactive group capable of reacting with the curable resin. Methods of preparing nanocalcite composites, and coatings and fibrous composites prepared from such nanocalcite composites are also described.Type: GrantFiled: December 17, 2009Date of Patent: July 31, 2018Assignee: 3M INNOVATIVE PROPERTIES COMPANYInventors: William J. Schultz, Mary I. Buckett, Peter D. Condo, Douglas P. Goetz, Chad A. Haraldson, Mark McCormick, Wendy L. Thompson, Steven J. Pachuta
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Publication number: 20170080369Abstract: A method of making a fluorinated fibrous web, which method includes providing a nonwoven web 22 that contains polymeric fibers, creating a plasma that contains fluorine atoms at a first location 14, and contacting the nonwoven web with products from the plasma at a second location 26 remote from the first location 14. The method avoids exposure of the web to the plasma and hence expands the manufacturing processing window. Webs so fluorinated have a different C3F4H+ to C2F5+ ratio when compared to locally fluorinated webs having similar levels of surface fluorination. The remote fluorinated webs can be subsequently charged electrically to provide a good performing electret filter 40 suitable for use in an air purifying respirator 30. Webs fluorinated in accordance with this invention also may exhibit good performance even after being “aged” at high temperatures.Type: ApplicationFiled: November 21, 2016Publication date: March 23, 2017Inventors: Seth M. Kirk, Marvin E. Jones, Steven J. Pachuta, Andrew W. Chen, William P. Klinzing, Patrick J. Sager
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Publication number: 20150024148Abstract: A method of making a fluorinated fibrous web, which method includes providing a nonwoven web 22 that contains polymeric fibers, creating a plasma that contains fluorine atoms at a first location 14, and contacting the nonwoven web with products from the plasma at a second location 26 remote from the first location 14. The method avoids exposure of the web to the plasma and hence expands the manufacturing processing window. Webs so fluorinated have a different C3F4H+ to C2F5+ ratio when compared to locally fluorinated webs having similar levels of surface fluorination. The remote fluorinated webs can be subsequently charged electrically to provide a good performing electret filter 40 suitable for use in an air purifying respirator 30. Webs fluorinated in accordance with this invention also may exhibit good performance even after being “aged” at high temperatures.Type: ApplicationFiled: October 2, 2014Publication date: January 22, 2015Inventors: Seth M. Kirk, Marvin E. Jones, Steven J. Pachuta, Andrew W. Chen, William P. Klinzing, Patrick J. Sager
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Publication number: 20120245253Abstract: Compositions comprising surface-modified calcite nanoparticles dispersed in a curable resin and to coatings and fibrous composites incorporating such compositions are described. The nanocalcite particles have a high magnesium to calcium surface concentration ratio. The surface-modifying agents include a binding group ionically associated with the nanoparticles, and a compatiblizing segment compatible with the curable resin. The surface-modifying agent may also include a reactive group capable of reacting with the curable resin. Methods of preparing nanocalcite composites, and coatings and fibrous composites prepared from such nanocalcite composites are also described.Type: ApplicationFiled: December 17, 2009Publication date: September 27, 2012Inventors: William J. Schultz, Mary I. Buckett, Peter D. Condo, Douglas P. Goetz, Chad A. Haraldson, Mark McCormick, Wendy L. Thompson, Steven J. Pachuta
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Publication number: 20110162653Abstract: A method of making a fluorinated fibrous web, which method includes providing a nonwoven web 22 that contains polymeric fibers, creating a plasma that contains fluorine atoms at a first location 14, and contacting the nonwoven web with products from the plasma at a second location 26 remote from the first location 14. The method avoids exposure of the web to the plasma and hence expands the manufacturing processing window. Webs so fluorinated have a different C3F4H+ to C2F5+ ratio when compared to locally fluorinated webs having similar levels of surface fluorination. The remote fluorinated webs can be subsequently charged electrically to provide a good performing electret filter 40 suitable for use in an air purifying respirator 30. Webs fluorinated in accordance with this invention also may exhibit good performance even after being “aged” at high temperatures.Type: ApplicationFiled: March 16, 2011Publication date: July 7, 2011Inventors: Seth M. Kirk, Marvin E. Jones, Steven J. Pachuta, Andrew W. Chen, William P. Klinzing, Patrick J. Sager
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Publication number: 20100252047Abstract: A method of making a fluorinated fibrous web, which method includes providing a nonwoven web 22 that contains polymeric fibers, creating a plasma that contains fluorine atoms at a first location 14, and contacting the nonwoven web with products from the plasma at a second location 26 remote from the first location 14. The method avoids exposure of the web to the plasma and hence expands the manufacturing processing window. Webs so fluorinated have a different C3F4H+ to C2F5+ ratio when compared to locally fluorinated webs having similar levels of surface fluorination. The remote fluorinated webs can be subsequently charged electrically to provide a good performing electret filter 40 suitable for use in an air purifying respirator 30. Webs fluorinated in accordance with this invention also may exhibit good performance even after being “aged” at high temperatures.Type: ApplicationFiled: April 3, 2009Publication date: October 7, 2010Inventors: Seth M. Kirk, Marvin E. Jones, Steven J. Pachuta, Andrew W. Chen, William P. Klinzing, Patrick J. Sager
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Patent number: 7244292Abstract: An electret article that includes a polymeric material that has electric charge imparted thereto, that has one or more heteroatoms, that has a fluorosaturation ratio of less than 200, and that has an atomic percent fluorine of greater than about 40%. The inventive electret article is resistant to charge degradation upon exposure to high temperatures for prolonged time periods.Type: GrantFiled: May 2, 2005Date of Patent: July 17, 2007Assignee: 3M Innovative Properties CompanyInventors: Seth M. Kirk, Gerald R. Spartz, Marvin E. Jones, Steven J. Pachuta, John S. Huberty
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Patent number: 7244291Abstract: An electret article that includes a polymeric material that has electric charge imparted thereto, that has a CF3:CF2 ratio of at least 0.15 and that has a fluorosaturation ratio greater than about 200. The electret article may be in the form of a porous web of polymeric fibers suitable for use as a filter. The inventive electret article is resistant to charge degradation upon exposure to high temperatures for prolonged time periods.Type: GrantFiled: May 2, 2005Date of Patent: July 17, 2007Assignee: 3M Innovative Properties CompanyInventors: Gerald R. Spartz, Seth M. Kirk, Marvin E. Jones, Hyacinth L. Cabibil, Alan D. Rousseau, Steven J. Pachuta