Patents by Inventor Hendrik Jan Haitjema

Hendrik Jan Haitjema 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).

  • Compositions capable of forming hydrogels in the eye
    Patent number: 6747090
    Abstract: The invention related to a hydrogel forming aqueous composition of water soluble polymers having a sufficiently high coherency that it substantially not is dispersed when being injected into an aqueous environment of a body site such as the capsular bag of the eye to undergo a photoinitiated crosslinking reaction. The water soluble polymers either can be a water-soluble polymer bearing free acrylic, or other vinylic groups capable of facile free radical reaction with a polymeric water-soluble photoinitiator also present in the composition, or a water-soluble polymer bearing both free acrylic, or other vinylic groups capable of facile free radical reaction and photoinitiator, wherein both polymers are capable of being crosslinked when irradiated with light of wavelengths greater than about 305 nm to form the hydrogel.
    Type: Grant
    Filed: July 16, 2002
    Date of Patent: June 8, 2004
    Assignee: Pharmacia Groningen BV
    Inventors: Jacqueline Hermina De Groot, Kenneth Albert Hodd, Hendrik Jan Haitjema
  • Injectable intraocular accommodating lens
    Patent number: 6613343
    Abstract: The present invention relates to compositions comprising polysiloxanes suitable for the preparation of accommodating intraocular lenses, having a specific gravity of greater than about 1.0, a refractive index suitable for restoring the refractive power of the natural crystalline lens and a viscosity suitable for injection through a standard cannula. The present invention includes intraocular lenses made from said polysiloxane compositions having a Young's modulus less than about 10 kPa.
    Type: Grant
    Filed: April 12, 2001
    Date of Patent: September 2, 2003
    Assignee: Pharmacia Groningen BV
    Inventors: Keith Alfred Dillingham, Hendrik Deuring, Jöns Gunnar Hilborn, László Garamszegi, Kenneth Albert Hodd, Hendrik Jan Haitjema
  • Compositions capable of forming hydrogels in the eye
    Publication number: 20030100666
    Abstract: The invention related to a hydrogel forming aqueous composition of water soluble polymers having a sufficiently high coherency that it substantially not is dispersed when being injected into an aqueous environment of a body site such as the capsular bag of the eye to undergo a photoinitiated crosslinking reaction. The water soluble polymers either can be a water-soluble polymer bearing free acrylic, or other vinylic groups capable of facile free radical reaction with a polymeric water-soluble photoinitiator also present in the composition, or a water-soluble polymer bearing both free acrylic, or other vinylic groups capable of facile free radical reaction and photoinitiator, wherein both polymers are capable of being crosslinked when irradiated with light of wavelengths greater than about 305 nm to form the hydrogel.
    Type: Application
    Filed: July 16, 2002
    Publication date: May 29, 2003
    Inventors: Jacqueline Hermina DeGroot, Kenneth Albert Hodd, Hendrik Jan Haitjema
  • Injectable intraocular accommodating lens
    Publication number: 20020071856
    Abstract: The present invention relates to compositions comprising polysiloxanes suitable for the preparation of accommodating intraocular lenses, having a specific gravity of greater than about 1.0, a refractive index suitable for restoring the refractive power of the natural crystalline lens and a viscosity suitable for injection through a standard cannula. The present invention includes intraocular lenses made from said polysiloxane compositions having a Young's modulus less than about 10 kPa.
    Type: Application
    Filed: April 12, 2001
    Publication date: June 13, 2002
    Inventors: Keith Alfred Dillingham, Hendrik Deuring, Jons Gunnar Hilborn, Laszlo Garamszegi, Kenneth Albert Hodd, Hendrik Jan Haitjema