Patents by Inventor Klaas de Groot

Klaas de Groot 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: 20160095880
    Abstract: The invention pertains to a biocompatible composition, suitable for use in soft or hard tissue augmentation, wherein the composition is an aqueous suspension containing a carrier fraction of ceramic particles of less than 15 ?m and an augmentation fraction of ceramic particles of at least 20 ?m. The ceramics typically comprise calcium phosphate. The composition is a may be used in soft tissue repair as well as hard bone replacement. It advantageously avoids the need for foreign body materials which are conventionally applied to stabilize augmentation suspensions.
    Type: Application
    Filed: December 11, 2015
    Publication date: April 7, 2016
    Applicant: Cam Bioceramics B.V.
    Inventors: Klaas DE GROOT, Nienke de ROODE-BEULING, Nol VAN DE MORTEL, Mariska BEZEMER
  • Patent number: 9233189
    Abstract: The invention pertains to a biocompatible composition, suitable for use in soft or hard tissue augmentation, wherein the composition is an aqueous suspension containing a carrier fraction of ceramic particles of less than 15 ?m and an augmentation fraction of ceramic particles of at least 20 ?m. The ceramics typically include calcium phosphate. The composition is a may be used in soft tissue repair as well as hard bone replacement. It advantageously avoids the need for foreign body materials which are conventionally applied to stabilize augmentation suspensions.
    Type: Grant
    Filed: November 26, 2012
    Date of Patent: January 12, 2016
    Assignee: Cam Bioceramics B.V.
    Inventors: Klaas De Groot, Nienke de Roode-Beuling, Nol Van De Mortel, Mariska Bezemer
  • Patent number: 8460685
    Abstract: The invention relates to methods of improving the osteoinductivity of calcium phosphate materials, to calcium phosphate materials having improved osteoinductivity as well as bone (re)generation scaffolds produced therefrom and to the use of such materials and scaffolds in methods of treatment.
    Type: Grant
    Filed: April 21, 2006
    Date of Patent: June 11, 2013
    Assignee: Progentix Orthobiology B.V.
    Inventors: Huipin Yuan, Joost Dick De Bruijn, Klaas De Groot
  • Publication number: 20100136117
    Abstract: The invention pertains to a biocompatible composition, suitable for use in soft or hard tissue augmentation, wherein the composition is an aqueous suspension containing a carrier fraction of ceramic particles of less than 15 &mgr;m and an augmentation fraction of ceramic particles of at least 20 &mgr;m. The ceramics typically comprise calcium phosphate. The composition is a may be used in soft tissue repair as well as hard bone replacement. It advantageously avoids the need for foreign body materials which are conventionally applied to stabilize augmentation suspensions.
    Type: Application
    Filed: October 4, 2007
    Publication date: June 3, 2010
    Inventor: Klaas DE GROOT
  • Publication number: 20100003304
    Abstract: The invention relates to methods of improving the osteoinductivity of calcium phosphate materials, to calcium phosphate materials having improved osteoinductivity as well as bone (re)generation scaffolds produced therefrom and to the use of such materials and scaffolds in methods of treatment.
    Type: Application
    Filed: April 21, 2006
    Publication date: January 7, 2010
    Applicant: PROGENTIX B.V.
    Inventors: Huipin Yuan, Joost D. De Bruijn, Klaas De Groot
  • Patent number: 6994883
    Abstract: The invention relates to the field of medical devices. More in particular, the invention relates to a method for coating by depositing inorganic ions and a bioactive agent to provide sterile medical devices, wherein said coating improves the biocompatibility and/or bioactivity of a medical device, such as an orthopedic or dental prosthesis. Furthermore, the invention relates to a medical device coated with a method according to the invention and to a reactor for use in a method according to the invention.
    Type: Grant
    Filed: July 30, 2003
    Date of Patent: February 7, 2006
    Assignee: IsoTis S.A.
    Inventors: Pierre Jean F. Layrolle, Martin Stigter, Klaas De Groot, Yuelian Liu
  • Publication number: 20050170070
    Abstract: The invention relates to the field of medical devices. More in particular, the invention relates to a method for coating by depositing inorganic ions and a bioactive agent to provide sterile medical devices, wherein said coating improves the biocompatibility and/or bioactivity of a medical device, such as an orthopedic or dental prosthesis. Furthermore, the invention relates to a medical device coated with a method according to the invention and to a reactor for use in a method according to the invention.
    Type: Application
    Filed: July 30, 2003
    Publication date: August 4, 2005
    Applicant: IsoTis S.A.
    Inventors: Pierre Layrolle, Martin Stigter, Klaas de Groot, Yuelian Liu
  • Publication number: 20050048193
    Abstract: The invention is directed to a method of preparing porous metals, as well as to these porous metals per se. More in particular the invention is directed to the use of these porous metals in the preparation of medical items, such as implants. The invention further relates to a method of providing a porous metal coating on a substrate, in particular on the surface of a medical item, such as an implant or scaffold for tissue engineering. According to the method of the invention, a polymeric foam is impregnated with a slurry of metal particles, such as titanium, tantalum, titanium alloy or tantalum alloy particles. The impregnated foam is subsequently dried and subjected to pyrolysis and subsequent sintering. Due to the presence of metal hydrides, the formation of undesired compounds, such as metal oxides or nitrides, is avoided.
    Type: Application
    Filed: August 18, 2003
    Publication date: March 3, 2005
    Applicant: ISOTIS N.V.
    Inventors: Jia Li, Pierre Layrolle, Klaas De Groot
  • Patent number: 6733503
    Abstract: The present invention relates to a method for coating a medical implant, wherein the implant is submersed in an aqueous solution of magnesium, calcium and phosphate ions through which a gaseous weak acid is passed, the solution is degassed, and the coating is allowed to precipitate onto the implant. The invention further relates to a medical implant coated in said method and to a device for use in said method.
    Type: Grant
    Filed: January 9, 2001
    Date of Patent: May 11, 2004
    Assignee: IsoTis N.V.
    Inventors: Pierre Jean François Layrolle, Klaas de Groot, Joost Dick de Bruijn, Clemens A. van Blitterswijk, Yuan Huipin
  • Patent number: 6692790
    Abstract: The invention relates to a method for providing a proteinaceous coating on a medical implant, comprising the steps of: submersing the implant in a first aqueous solution comprising a protein and magnesium, calcium and phosphate ions through which a gaseous weak acid is passed; degassing the solution; allowing a coating to precipitate onto the implant; submersing the coated implant in a second solution to redissolve the magnesium, calcium and phosphate ions and to obtain the proteinaceous coating.
    Type: Grant
    Filed: August 5, 2002
    Date of Patent: February 17, 2004
    Assignee: Chienna B.V.
    Inventors: Yuelian Liu, Klaas de Groot, Pierre Jean F. Layrolle
  • Publication number: 20030113438
    Abstract: The invention relates to a method for providing a proteinaceous coating on a medical implant, comprising the steps of: submersing the implant in a first aqueous solution comprising a protein and magnesium, calcium and phosphate ions through which a gaseous weak acid is passed; degassing the solution; allowing a coating to precipitate onto the implant; submersing the coated implant in a second solution to redissolve the magnesium, calcium and phosphate ions and to obtain the proteinaceous coating.
    Type: Application
    Filed: August 5, 2002
    Publication date: June 19, 2003
    Applicant: IsoTis N.V.
    Inventors: Yuelian Liu, Klaas de Groot, Pierre Jean F. Layrolle
  • Patent number: 6511510
    Abstract: The invention relates to an osteoinductive biomaterial, which is based on a ceramic material and which has a total porosity of 20 to 90%, wherein macropores are present having a size ranging from 0.1 to 1.5 mm, and wherein micropores are present having a size ranging from 0.05 to 20 &mgr;m. The invention further relates to a process for preparing said osteoinductive biomaterial.
    Type: Grant
    Filed: September 15, 1999
    Date of Patent: January 28, 2003
    Assignee: IsoTis N.V.
    Inventors: Joost D. de Bruijn, Klaas de Groot, Clemens A. van Blitterswijk, Yuan Huipin
  • Patent number: 6479418
    Abstract: The invention relates to a process for preparing a porous ceramic body, which process is based on a negative replica method. The invention further relates to a ceramic body obtainable by said method and to its use as a scaffold for tissue engineering.
    Type: Grant
    Filed: December 15, 2000
    Date of Patent: November 12, 2002
    Assignee: IsoTis N.V.
    Inventors: Shihong Li, Klaas de Groot, Pierre Jean F. Layrolle, Clemens Antoni van Blitterswijk, Joost Robert de Wijn
  • Publication number: 20020037799
    Abstract: The invention relates to a process for preparing a porous ceramic body, which process is based on a negative replica method. The invention further relates to a ceramic body obtainable by said method and to its use as a scaffold for tissue engineering.
    Type: Application
    Filed: December 15, 2000
    Publication date: March 28, 2002
    Inventors: Shihong Li, Klaas de Groot, Pierre Jean F. Layrolle, Clemens Antoni van Blitterswijk, Joost Robert de Wijn
  • Patent number: 6344061
    Abstract: The invention provides an implantable device coated with a layer of calcium phosphate and optionally one or more biologically active substances such as growth factors, lipis, (lipo)polysaccharides, hormones, proteins, antibiotics or cytostatics. The device can be obtained by a nanotechnology process comprising subjecting a substrate to a surface treatment until a surface roughness with an average peak distance (Ra value) between 10 and 1,000 nm and subjecting the roughened surface to precipitation of calcium phosphate from a solution containing calcium and phosphate ions with optional coprepitation of the biologically active substance.
    Type: Grant
    Filed: July 26, 2000
    Date of Patent: February 5, 2002
    Assignee: IsoTis N.V.
    Inventors: Eugenia Ribeiro de Sousa Fidalgo Leitao, Joost Dick De Bruijn, Hai-Bo Wen, Klaas De Groot
  • Publication number: 20010053406
    Abstract: The present invention relates to a method for coating a medical implant, wherein the implant is submersed in an aqueous solution of magnesium, calcium and phosphate ions through which a gaseous weak acid is passed, the solution is degassed, and the coating is allowed to precipitate onto the implant. The invention further relates to a medical implant coated in said method and to a device for use in said method.
    Type: Application
    Filed: January 9, 2001
    Publication date: December 20, 2001
    Applicant: IsoTis B.V.
    Inventors: Pierre Jean Francois Layrolle, Klaas de Groot, Joost Dick de Bruijn, Clemens A. van Blitterswijk, Yuan Huipin
  • Publication number: 20010008649
    Abstract: The present invention relates to a method for coating a medical implant, wherein the implant is submersed in an aqueous solution of magnesium, calcium and phosphate ions through which a gaseous weak acid is passed, the solution is degassed, and the coating is allowed to precipitate onto the implant. The invention further relates to a medical implant coated in said method and to a device for use in said method.
    Type: Application
    Filed: January 9, 2001
    Publication date: July 19, 2001
    Applicant: Iso Tis B.V.
    Inventors: Pierre Jean Francois Layrolle, Klaas de Groot, Joost Dick de Bruijn, Clemens A. van Blitterswijk, Yuan Huipin
  • Patent number: 6207218
    Abstract: The present invention relates to a method for coating a medical implant, wherein the implant is submersed in an aqueous solution of magnesium, calcium and phosphate ions through which a gaseous weak acid is passed, the solution is degassed, and the coating is allowed to precipitate onto the implant. The invention further relates to a medical implant coated in said method and to a device for use in said method.
    Type: Grant
    Filed: July 12, 1999
    Date of Patent: March 27, 2001
    Assignee: IsoTis B.V.
    Inventors: Pierre Jean François Layrolle, Klaas de Groot, Joost Dick de Bruijn, Clemens A. van Blitterswijk, Yuan Huipin
  • Patent number: 6143948
    Abstract: The invention provides an implantable device coated with a layer of calcium phosphate and optionally one or more biologically active substances such as growth factors, lipids, (lipo)polysaccharides, hormones, proteins, antibiotics or cytostatics. The device can be obtained by a nanotechnology process comprising subjecting a substrate to a surface treatment until a surface roughness with an average peak distance (Ra value) between 10 and 1,000 nm and subjecting the roughened surface to precipitation of calcium phosphate from a solution containing calcium and phosphate ions with optional coprecipitation of the biologically active substance.
    Type: Grant
    Filed: July 3, 1997
    Date of Patent: November 7, 2000
    Assignee: IsoTis B.V.
    Inventors: Eugenia Ribeiro de Sousa Fidalgo Leitao, Joost Dick De Bruijn, Hai-Bo Wen, Klaas De Groot
  • Patent number: 6136369
    Abstract: The invention provides an implantable device coated with a layer of calcium phosphate and optionally one or more biologically active substances such as growth factors, lipis, (lipo)polysaccharides, hormones, proteins, antibiotics or cytostatics. The device can be obtained by a nanotechnology process comprising subjecting a substrate to a surface treatment until a surface roughness with an average peak distance (Ra value) between 10 and 1,000 nm and subjecting the roughened surface to precipitation of calcium phosphate from a solution containing calcium and phosphate ions with optional coprepitation of the biologically active substance.
    Type: Grant
    Filed: April 23, 1999
    Date of Patent: October 24, 2000
    Assignee: IsoTis B.V.
    Inventors: Eugenia Ribeiro de Sousa Fidalgo Leitao, Joost Dick De Bruijn, Hai-Bo Wen, Klaas De Groot