Patents by Inventor Kristoffer Almdal
Kristoffer Almdal 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).
-
Publication number: 20240009931Abstract: A method for producing a multi-material three-dimensional object includes: computing projections describing the object from different orientation angles, including: a number of first projections describing a first part of said object to be formed in a first material; a number of second projections describing a second part of said object to be formed in a second material; providing a build volume comprising: a first photosensitive component for polymerizing into the first material upon irradiation by a first wavelength light; a second photosensitive component for polymerizing into the second material upon irradiation by a second wavelength light, the second material having different mechanical properties than the first; and irradiating the build volume with a number of patterns of light, at the respective corresponding orientations/wavelengths such that the first wavelength light deposits energy according to a first energy distribution and the second wavelength light deposits energy according to a second energType: ApplicationFiled: October 27, 2021Publication date: January 11, 2024Inventors: Yi Yang, Kristoffer Almdal
-
Patent number: 9095508Abstract: Example embodiments relate to a composite material exhibiting a low or even negligible volumetric shrinkage upon curing, or even a small expansion (e.g. up to 0.5%), in particular composite materials in the form of dental filling materials. Example embodiments also relate to a method of controlling volumetric shrinkage of a composite material upon curing, and to a method of reconstructing a tooth. Example embodiments also relate to ultrasonic curing of dental filling materials. Example embodiments further relate to a population of zirconia particles and methods for preparing such zirconia particles (e.g. zirconia in the tetragonal phase or zirconia in the cubic phase). The martensitic transformation of the filler ingredients is, e.g., triggered by application of ultrasound or by a chemical trigger.Type: GrantFiled: February 28, 2011Date of Patent: August 4, 2015Assignee: APROXI APSInventors: Alexander Van Lelieveld, Kristoffer Almdal, Søren Linderoth, Bent Sørensen
-
Publication number: 20110152400Abstract: Example embodiments relate to a composite material exhibiting a low or even negligible volumetric shrinkage upon curing, or even a small expansion (e.g. up to 0.5%), in particular composite materials in the form of dental filling materials. Example embodiments also relate to a method of controlling volumetric shrinkage of a composite material upon curing, and to a method of reconstructing a tooth. Example embodiments also relate to ultrasonic curing of dental filling materials. Example embodiments further relate to a population of zirconia particles and methods for preparing such zirconia particles (e.g. zirconia in the tetragonal phase or zirconia in the cubic phase). The martensitic transformation of the filler ingredients is, e.g., triggered by application of ultrasound or by a chemical trigger.Type: ApplicationFiled: February 28, 2011Publication date: June 23, 2011Inventors: Alexander Van Lelieveld, Kristoffer Almdal, Søren Linderoth, Bent Sørensen
-
Publication number: 20100016465Abstract: The present invention discloses a composite material comprising one or more fillers and a polymerizable resin base, wherein said one or more fillers comprise at least one filler ingredient, said filler ingredient(s) being present in a metastable first phase and being able to undergo a martensitic transformation to a stable second phase, the volume ratio between said stable second phase and said metastable first phase of said filler ingredient(s) being at least 1.005, and wherein said material further comprises one or more water- or acid- releasing agents; as well as a corresponding method of controlling the volumetric shrinkage of a composite material upon curing.Type: ApplicationFiled: March 13, 2007Publication date: January 21, 2010Inventors: Alexander Van Lelieveld, Mette Skovgaard Nielsen, Kristoffer Almdal, Søren Linderoth
-
Publication number: 20090234459Abstract: The present invention relates to implants used for alleviating and/or preventing conditions relating to damaged joints involving articulating surfaces. The implants comprise fibre of polymer and/or metal, and can be used as an artificial joint, as part of an artificial joint or as an artificial joint spacer made to replace the missing cartilage or to improve the slidability between two natural and/or artificial components of the body, or between a natural and artificial component. The product of the invention can be used to partly or entirely coat medical products or to make up implant partly or entirely.Type: ApplicationFiled: December 9, 2008Publication date: September 17, 2009Applicant: Cartificial A/SInventors: Sune Lund Sporring, Ole Olsen, Jes Bruun Lauritzen, Tom Logstrup Andersen, Povl Brondsted, Klaus Bechgaard, Jan Guldberg Hansen, Henrik Jensen, Kristoffer Almdal, Soren Mouritsen
-
Publication number: 20080119585Abstract: The present invention relates to a composite material exhibiting a low or even negligible volumetric shrinkage upon curing, or even a small expansion (e.g. up to 0.5%), in particular composite materials in the form of dental filling materials. The present invention also relates to a method of controlling volumetric shrinkage of a composite material upon curing, and to a method of reconstructing a tooth. The present invention also relates to ultrasonic curing of dental filling materials. The present invention further relates to a population of zirconia particles and methods for preparing such zirconia particles (e.g. zirconia in the tetragonal phase or zirconia in the cubic phase). The martensitic transformation of the filler ingredients is, e.g., triggered by application of ultrasound or by a chemical trigger.Type: ApplicationFiled: April 14, 2005Publication date: May 22, 2008Applicant: DENTOFIT A/SInventors: Alexander Van Lelieveld, Kristoffer Almdal, Soren Linderoth, Bent Sorensen
-
Patent number: 5955546Abstract: The invention relates to melt-miscible polyolefin blends, and a process for preparing the melt-miscible blends, of two or more polyolefins. Matching, within defined limits, the segment length of a modifying polyolefin with the segment length of a primary polyolefin, such as polypropylene or an ethylene/alpha-olefin copolymer, provides blends of the "matched" components which blends were heretofore unknown to be melt-miscible. A broad range of polyolefin blend compositions, and of polyolefin blends containing other polymers made compatible or dispersible with the polyolefin blend compositions, are defined, all of the blend compositions having at least one melt-miscible polyolefin phase.Type: GrantFiled: January 16, 1998Date of Patent: September 21, 1999Assignee: Regents of the University of MinnesotaInventors: Frank S. Bates, Jeffrey H. Rosedale, Mark F. Schulz, Kristoffer Almdal
-
Patent number: 5886104Abstract: A solid support for the solid-phase synthesis of peptides or proteins in high yield and in high purity, suited both to the synthesis of a single peptide or protein and to the parallel and substantially simultaneous synthesis of a plurality thereof, is based on a cross-linked polyolefin, especially polyethylene, substrate, the cross-linking having been obtained by irradiation with high energy electrons or .gamma. radiation or treatment with organic peroxide such as benzoyl peroxide, to which substrate are grafted polymer chains such as polystyrene chains which are functionalized with a chemical functionality facilitating the formation of an anchoring linkage between the polymer moiety and another chemical species. The solid support is also suited for use in solid-phase biosystems, notably bioassays, such as immunoassays, DNA hybridization assays or PCR amplification.Type: GrantFiled: December 18, 1995Date of Patent: March 23, 1999Assignee: Forskniingscenter RisoInventors: Walther Batsberg Pedersen, Kristoffer Almdal, Lars Winther, Rolf Henrik Berg
-
Patent number: 5710219Abstract: The invention relates to melt-miscible polyolefin blends, and a process for preparing the melt-miscible blends, of two or more polyolefins. Matching, within defined limits, the segment length of a modifying polyolefin with the segment length of a primary polyolefin, such as polypropylene or an ethylene/alpha-olefin copolymer, provides blends of the "matched" components which blends were heretofore unknown to be melt-miscible. A broad range of polyolefin blend compositions, and of polyolefin blends containing other polymers made compatible or dispersible with the polyolefin blend compositions, are defined, all of the blend compositions having at least one melt-miscible polyolefin phase.Type: GrantFiled: September 23, 1994Date of Patent: January 20, 1998Assignee: Regents of the University of MinnesotaInventors: Frank S. Bates, Jeffrey H. Rosedale, Mark F. Schulz, Kristoffer Almdal
-
Patent number: 5654364Abstract: The invention relates to melt-miscible polyolefin blends, and a process for preparing the melt-miscible blends, of two or more polyolefins. Matching of the segment length of a modifying polyolefin with the segment length of a primary polyolefin, such as polypropylene or an ethylene/alpha-olefin copolymer, provides polyolefin blends heretofore unknown to be melt-miscible. A broad range of polyolefin blend compositions, and of polyolefin blends containing other polymers made compatible with the polyolefin blend compositions, are defined, all of the blend compositions having at least one melt-miscible polyolefin phase.Type: GrantFiled: April 21, 1995Date of Patent: August 5, 1997Assignee: Regents of the University of MinnesotaInventors: Frank Steven Bates, Jeffrey Harris Rosedale, Mark Frederic Schulz, Kristoffer Almdal
-
Patent number: 5571864Abstract: The invention relates to melt-miscible polyolefin blends, and a process for preparing the melt-miscible blends, of two or more polyolefins. Matching, within defined limits, the segment length of a modifying polyolefin with the segment length of a primary polyolefin, such as polypropylene or an ethylene/alpha-olefin copolymer, provides blends of the "matched" components which blends were heretofore unknown to be melt-miscible. A broad range of polyolefin blend compositions, and of polyolefin blends containing other polymers made compatible or dispersible with the polyolefin blend compositions, are defined, all of the blend compositions having at least one melt-miscible polyolefin phase.Type: GrantFiled: February 1, 1994Date of Patent: November 5, 1996Assignee: Regents of the University of MinnesotaInventors: Frank S. Bates, Jeffrey H. Rosedale, Mark F. Schulz, Kristoffer Almdal
-
Patent number: 5373053Abstract: A method for the solid-phase synthesis of peptides or proteins in high yield and high purity uses a solid support consisting of a functionalized polystyrene-grafted polymer substrate, the grafted polystyrene chains being substantially non-cross-linked and having a chain molecular weight, not including optional non-reactive substituents, of at least 200,000, preferably in the range of 600,000-1,200,000. Particularly suitable polymer substrates are substrates of a polyolefin such as polyethylene. The method is particularly well-suited to the compartmentalized synthesis of a multitude of peptides or proteins in a parallel and substantially simultaneous fashion.Type: GrantFiled: December 14, 1992Date of Patent: December 13, 1994Assignee: Riso National LaboratoryInventors: Rolf H. Berg, Kristoffer Almdal, Walther B. Pedersen, Arne Holm, James P. Tam, Robert B. Merrifield
-
Patent number: 5258454Abstract: A method for the solid-phase synthesis of peptides or proteins in high yield and high purity uses a solid-support consisting of a functionalized polystyrene-grafted polymer substrate, the grafted polystyrene chains being substantially non-cross-linked and having a chain molecular weight, not including optional non-reactive substituents, of at least 200,000, preferably in the range of 600,000-1,200,000. Particularly suitable polymer substrates are substrates of a polyolefin such as polyethylene. The method is particularly well-suited to the compartmentalized synthesis of a multitude of peptides or proteins in a parallel and substantially simultaneous fashion.Type: GrantFiled: May 12, 1992Date of Patent: November 2, 1993Assignee: Riso National LaboratoryInventors: Rolf H. Berg, Kristoffer Almdal, Walther B. Pedersen, Arne Holm, James P. Tam, Robert B. Merrifield