Patents by Inventor PAMELA PERCHA
PAMELA PERCHA 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: 20230363858Abstract: A dental appliance includes a polymeric shell with a plurality of cavities for receiving one or more teeth, including an interior region with a core layer of a first thermoplastic polymer A with a thermal transition temperature of about 70° C. to about 140° C. and a flexural modulus greater than about 1.3 GPa, and first and second interior layers of a second thermoplastic polymer B with a glass transition temperature of less than about 0° C., a flexural modulus less than about 1 GPa, and an elongation a break of greater than 150%; and first and second exterior layers of a third thermoplastic polymer C with a thermal transition temperature of about 70° C. to about 140° C. and a flexural modulus greater than about 1.3 GPa. The dental appliance demonstrates enhanced optical properties, with enhanced light transmission and low haze.Type: ApplicationFiled: October 5, 2021Publication date: November 16, 2023Inventors: Ta-Hua Yu, Pamela A. Percha, Karl J.L. Geisler, Bruce R. Broyles
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Publication number: 20220127505Abstract: The present invention is adhesive article including a tie layer and a silicone adhesive. The tie layer includes a segmented copolymer having a first segment that is one of (a) a polyether comprising one of PTMO or PEO/PPO or (b) a polysiloxane. The segmented copolymer has a water absorbency of less than about 13%.Type: ApplicationFiled: March 13, 2020Publication date: April 28, 2022Inventors: Jennifer N. Hanson, Kiu-Yuen Tse, Amanda C. Engler, Pamela A. Percha
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Publication number: 20220112331Abstract: Described is a cationic initiator system comprising a cationic initiator; and an accelerator composition comprising 1) a operoxyketal; and 2) an accelerator compound selected from arylhydroxy compounds and ?-diketone compounds.Type: ApplicationFiled: January 31, 2020Publication date: April 14, 2022Inventors: Wayne S. Mahoney, Pamela A. Percha
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Patent number: 11105018Abstract: A process and apparatus for producing a dimensionally stable melt blown nonwoven fibrous web. The process includes forming a multiplicity of melt blown fibers by passing a molten stream including molecules of at least one thermoplastic semi-crystalline (co)polymer through at least one orifice of a melt-blowing die, subjecting at least a portion of the melt blown fibers to a controlled in-flight heat treatment operation at a temperature below a melting temperature of the at least one thermoplastic semi-crystalline (co)polymer immediately upon exiting from the at least one orifice, and collecting at least some of the melt blown fibers subjected to the controlled in-flight heat treatment operation on a collector to form a non-woven fibrous structure. The nonwoven fibrous structure exhibits a Shrinkage less than a Shrinkage measured on an identically-prepared structure including only fibers not subjected to the controlled in-flight heat treatment operation, and generally less than 15%.Type: GrantFiled: July 17, 2019Date of Patent: August 31, 2021Assignee: 3M INNOVATIVE PROPERTIES COMPANYInventors: Daniel J. Zillig, Sachin Talwar, Randy L. Christiansen, Michael D. Romano, Eric M. Moore, Pamela A. Percha, Liming Song, Myles L. Brostrom, Michael D. Swan
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Patent number: 11066551Abstract: In one embodiment, a film is described comprising a mixture of semicrystalline polylactic acid polymer; polyvinyl acetate polymer having a glass transition temperature (Tg) midpoint as measured by differential scanning calorimetry of at least 25° C.; and plasticizer; wherein the film is oriented. In another embodiment, a film is described comprising a mixture comprising semicrystalline polylactic acid polymer, polymer having a midpoint Tg as measured by differential scanning calorimetry of at least 25° C., and plasticizer; wherein the mixture exhibits a single midpoint Tg and the single midpoint Tg ranges from 40° C. to 65° C.; and wherein the film is oriented and the oriented film exhibits a higher midpoint Tg ranging from 40° C. to 65° C. and a lower midpoint Tg ranging from 5 to 25° C.Type: GrantFiled: May 4, 2017Date of Patent: July 20, 2021Assignee: 3M Innovative Properties CompanyInventors: William W. Merrill, Jeffrey P. Kalish, Pamela A. Percha, Derek J. Dehn, Bradley L. Givot, Ignatius A. Kadoma
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Publication number: 20190338447Abstract: A process and apparatus for producing a dimensionally stable melt blown nonwoven fibrous web. The process includes forming a multiplicity of melt blown fibers by passing a molten stream including molecules of at least one thermoplastic semi-crystalline (co)polymer through at least one orifice of a melt-blowing die, subjecting at least a portion of the melt blown fibers to a controlled in-flight heat treatment operation at a temperature below a melting temperature of the at least one thermoplastic semi-crystalline (co)polymer immediately upon exiting from the at least one orifice, and collecting at least some of the melt blown fibers subjected to the controlled in-flight heat treatment operation on a collector to form a non-woven fibrous structure. The nonwoven fibrous structure exhibits a Shrinkage less than a Shrinkage measured on an identically-prepared structure including only fibers not subjected to the controlled in-flight heat treatment operation, and generally less than 15%.Type: ApplicationFiled: July 17, 2019Publication date: November 7, 2019Inventors: Daniel J. Zillig, Sachin Talwar, Randy L. Christiansen, Michael D. Romano, Eric M. Moore, Pamela A. Percha, Liming Song, Myles L. Brostrom, Michael D. Swan
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Patent number: 10400354Abstract: A process and apparatus for producing a dimensionally stable melt blown nonwoven fibrous web. The process includes forming a multiplicity of melt blown fibers by passing a molten stream including molecules of at least one thermoplastic semi-crystalline (co)polymer through at least one orifice of a melt-blowing die, subjecting at least a portion of the melt blown fibers to a controlled in-flight heat treatment operation at a temperature below a melting temperature of the at least one thermoplastic semi-crystalline (co)polymer immediately upon exiting from the at least one orifice, and collecting at least some of the melt blown fibers subjected to the controlled in-flight heat treatment operation on a collector to form a non-woven fibrous structure. The nonwoven fibrous structure exhibits a Shrinkage less than a Shrinkage measured on an identically-prepared structure including only fibers not subjected to the controlled in-flight heat treatment operation, and generally less than 15%.Type: GrantFiled: November 19, 2014Date of Patent: September 3, 2019Assignee: 3M INNOVATIVE PROPERTIES COMPANYInventors: Daniel J. Zillig, Sachin Talwar, Randy L. Christiansen, Michael D. Romano, Eric M. Moore, Pamela A. Percha, Liming Song, Myles L. Brostrom, Michael D. Swan
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Publication number: 20190136045Abstract: In one embodiment, a film is described comprising a mixture of semicrystalline polylactic acid polymer; polyvinyl acetate polymer having a glass transition temperature (Tg) midpoint as measured by differential scanning calorimetry of at least 25° C.; and plasticizer; wherein the film is oriented. In another embodiment, a film is described comprising a mixture comprising semicrystalline polylactic acid polymer, polymer having a midpoint Tg as measured by differential scanning calorimetry of at least 25° C., and plasticizer; wherein the mixture exhibits a single midpoint Tg and the single midpoint Tg ranges from 40° C. to 65° C.; and wherein the film is oriented and the oriented film exhibits a higher midpoint Tg ranging from 40° C. to 65° C. and a lower midpoint Tg ranging from 5 to 25° C.Type: ApplicationFiled: May 4, 2017Publication date: May 9, 2019Inventors: William W. Merrill, Jeffrey P. Kalish, Pamela A. Percha, Derek J. Dehn, Bradley L. Givot, Ignatius A. Kadoma
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Patent number: 9932476Abstract: A composition comprises a blend comprising (a) a binder comprising (i) C5 hydrocarbon resin or (ii) a resin comprising rosin acids, rosin esters, modified rosin acids, modified rosin esters or mixtures thereof, and (b) polydimethylsiloxane polyamide copolymer.Type: GrantFiled: March 13, 2013Date of Patent: April 3, 2018Assignee: 3M INNOVATIVE PROPERTIES COMPANYInventors: Alexander J. Kugel, Eugene H. Carlson, Matthew D. Wilding, Rajdeep S. Kalgutkar, Pamela A. Percha
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Publication number: 20160341119Abstract: A melt blowing process comprising: (a) providing a thermoplastic polymer material that includes at least one or a plurality of polyester polymers and at least one or a combination of different meltable metal phosphinates; and (b) melt blowing the thermoplastic polymer material into at least one fiber or a plurality of fibers, with each fiber having a diameter or thickness that is less than about 10 microns. The metal phosphinate is in an amount that (a) reduces the viscosity of the polyester polymer and (b) functions as a crystallizing agent, which at least promotes crystallization of the polyester polymer, when the thermoplastic polymer material is melt blown into the at least one fiber. Non-woven and woven fibrous structures can be made using fibers made from this process.Type: ApplicationFiled: August 3, 2016Publication date: November 24, 2016Inventors: Nataliya V. Fedorova, Eric M. Moore, Sehyun Nam, Pamela A. Percha, Sachin Talwar
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Publication number: 20160298266Abstract: A process and apparatus for producing a dimensionally stable melt blown nonwoven fibrous web. The process includes forming a multiplicity of melt blown fibers by passing a molten stream including molecules of at least one thermoplastic semi-crystalline (co)polymer through at least one orifice of a melt-blowing die, subjecting at least a portion of the melt blown fibers to a controlled in-flight heat treatment operation at a temperature below a melting temperature of the at least one thermoplastic semi-crystalline (co)polymer immediately upon exiting from the at least one orifice, and collecting at least some of the melt blown fibers subjected to the controlled in-flight heat treatment operation on a collector to form a non-woven fibrous structure. The nonwoven fibrous structure exhibits a Shrinkage less than a Shrinkage measured on an identically-prepared structure including only fibers not subjected to the controlled in-flight heat treatment operation, and generally less than 15%.Type: ApplicationFiled: November 19, 2014Publication date: October 13, 2016Applicant: 3M Innovative Properties CompanyInventors: Daniel J. Zillig, Sachin Talwar, Randy L. Christiansen, Michael D. Romano, Eric M. Moore, Pamela A. Percha, Liming Song, Myles L. Brostrom, Michael D. Swan
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Patent number: 9447523Abstract: A melt blowing process comprising: (a) providing a thermoplastic polymer material that includes at least one or a plurality of polyester polymers and at least one or a combination of different meltable metal phosphinates; and (b) melt blowing the thermoplastic polymer material into at least one fiber or a plurality of fibers, with each fiber having a diameter or thickness that is less than about 10 microns. The metal phosphinate is in an amount that (a) reduces the viscosity of the polyester polymer and (b) functions as a crystallizing agent, which at least promotes crystallization of the polyester polymer, when the thermoplastic polymer material is melt blown into the at least one fiber. Non-woven and woven fibrous structures can be made using fibers made from this process.Type: GrantFiled: December 20, 2012Date of Patent: September 20, 2016Assignee: 3M INNOVATIVE PROPERTIES COMPANYInventors: Nataliya V. Fedorova, Eric M. Moore, Sehyun Nam, Pamela A. Percha, Sachin Talwar
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Patent number: 9340934Abstract: The thermoplastic pavements markers and pavement marking compositions of the present application include a miscible blend of ethylene acrylic acid polymers and have a crystallization onset temperature observed upon cooling of greater than 65.6° C. (150° F.).Type: GrantFiled: August 30, 2012Date of Patent: May 17, 2016Assignee: 3M INNOVATIVE PROPERTIES COMPANYInventors: Eugen H. Carlson, Alexander J. Kugel, Matthew D. Wilding, Pamela A. Percha
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Patent number: 9139940Abstract: A method for making a bonded nonwoven fibrous web comprising 1) providing a nonwoven fibrous web that comprises oriented semicrystalline polymeric fibers, and 2) subjecting the web to a controlled heating and quenching operation that includes a) forcefully passing through the web a fluid heated to at least the onset melting temperature of said polymeric material for a time too short to wholly melt the fibers, and b) immediately quenching the web by forcefully passing through the web a fluid at a temperature at least 50° C. less than the Nominal Melting Point of the material of the fibers. The fibers of the treated web generally have i) an amorphous-characterized phase that exhibits repeatable softening (making the fibers softenable) and ii) a crystallite-characterized phase that reinforces the fiber structure during softening of the amorphous-characterized phase, whereby the fibers may be autogenously bonded while retaining orientation and fiber structure.Type: GrantFiled: July 31, 2006Date of Patent: September 22, 2015Assignee: 3M Innovative Properties companyInventors: Michael R. Berrigan, John D. Stelter, Pamela A. Percha, Andrew R. Fox, William T. Fay
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Publication number: 20150252195Abstract: A composition comprises a blend comprising (a) a binder comprising (i) C5 hydrocarbon resin or (ii) a resin comprising rosin acids, rosin esters, modified rosin acids, modified rosin esters or mixtures thereof, and (b) polydimethylsiloxane polyamide copolymer.Type: ApplicationFiled: March 13, 2013Publication date: September 10, 2015Inventors: Alexander J. Kugel, Eugene H. Carlson, Matthew D. Wilding, Rajdeep S. Kalgutkar, Pamela A. Percha
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Publication number: 20150125696Abstract: A melt blowing process comprising: (a) providing a thermoplastic polymer material that includes at least one or a plurality of polyester polymers and at least one or a combination of different meltable metal phosphinates; and (b) melt blowing the thermoplastic polymer material into at least one fiber or a plurality of fibers, with each fiber having a diameter or thickness that is less than about 10 microns. The metal phosphinate is in an amount that (a) reduces the viscosity of the polyester polymer and (b) functions as a crystallizing agent, which at least promotes crystallization of the polyester polymer, when the thermoplastic polymer material is melt blown into the at least one fiber. Non-woven and woven fibrous structures can be made using fibers made from this process.Type: ApplicationFiled: December 20, 2012Publication date: May 7, 2015Inventors: Nataliya V. Fedorova, Eric M. Moore, Sehyun Nam, Pamela A. Percha, Sachin Talwar
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Patent number: 8835749Abstract: A solar panel backside film used in solar panel constructions. The film comprises a PET film having a net peak area as measured by differential scanning calorimetry of about ?15 J/g to about 5 J/g measured from the endpoint of the glass transition (Tg) up to 230° C., and an additive to opacify the PET film. A polymeric layer is adhered to the PET film to create a solar panel backside film. The solar panel backside film generally has a reflectivity of 50% or greater at a point in the visible range of light. Additionally, the solar panel backside film, when applied to a solar panel and exposed to 2000 hours at 85° C. and 85% relative humidity, does not result in exfoliation or visible cracks in the PET film.Type: GrantFiled: March 7, 2008Date of Patent: September 16, 2014Assignee: 3M Innovative Properties CompanyInventors: Thomas J. Blong, Robert F. Babb, Peter J. Harrison, Pamela A. Percha
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Publication number: 20140193576Abstract: The thermoplastic pavements markers and pavement marking compositions of the present application include a miscible blend of ethylene acrylic acid polymers and have a crystallization onset temperature observed upon cooling of greater than 65.6° C. (150° F.).Type: ApplicationFiled: August 30, 2012Publication date: July 10, 2014Applicant: 3M INNOVATIVE PROPERTIES COMPANYInventors: Eugen H. Carlson, Alexander J. Kugel, Matthew D. Wilding, Pamela A. Percha
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Publication number: 20120064198Abstract: Described herein is a label for produce wherein the label comprises a facestock and a heat-activated adhesive having a viscosity at 100° C. of less than 4.5×106 Poise as measured according to the Viscosity Test Procedure, and wherein the heat-activated adhesive bonds the label to a surface of the piece of produce.Type: ApplicationFiled: September 15, 2010Publication date: March 15, 2012Inventors: Craig M. Kehres, Pamela A. Percha, Daniel P. Sheehy, Eric L. Zilley
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Publication number: 20110240102Abstract: A solar panel backside film used in solar panel constructions. The film comprises a PET film having a net peak area as measured by differential scanning calorimetry of about ?15 J/g to about 5 J/g measured from the endpoint of the glass transition (Tg) up to 230° C., and an additive to opacify the PET film. A polymeric layer is adhered to the PET film to create a solar panel backside film. The solar panel backside film generally has a reflectivity of 50% or greater at a point in the visible range of light. Additionally, the solar panel backside film, when applied to a solar panel and exposed to 2000 hours at 85° C. and 85% relative humidity, does not result in exfoliation or visible cracks in the PET film.Type: ApplicationFiled: June 13, 2011Publication date: October 6, 2011Inventors: Thomas J. Blong, Robert F. Babb, Peter J. Harrison, Pamela A. Percha