Patents by Inventor Madeleine Clare Griffiths

Madeleine Clare Griffiths 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).

  • Cell growth substrate polymer
    Patent number: 5994133
    Abstract: Cell growth substrate polymers are described which comprise a macromonomer of the formula (I): Q-(PFPE-L).sub.n-1 -PFPE-Q, wherein n is at least 1.0; each PFPE may be the same or different and is a perfluorinated polyether of the formula (II): --OCH.sub.2 CF.sub.2 O (CF.sub.2 CF.sub.2 O).sub.x (CF.sub.2 O).sub.y CF.sub.2 CH.sub.2 O--, wherein the CF.sub.2 CF.sub.2 O and CF.sub.2 O units may be randomly distributed or distributed as blocks throughout the chain and wherein x and y may be the same or different such that the molecular weight of the perfluoropolyether is in the range of from 242 to 4000, L is a difunctional linking group; and Q at each end of the macromonomer is the same or different and is a polymerizable group. The cell growth substrate polymers may be used in the production of comeal implants.
    Type: Grant
    Filed: January 6, 1998
    Date of Patent: November 30, 1999
    Assignees: Novartis AG, Commonwealth Scientific and Industrial Research Organisation
    Inventors: Gordon Francis Meijs, Bronwyn Glenice Laycock, Madeleine Clare Griffiths, Edith Cheong, John Gerard Steele, Graham Johnson
  • Perfluoroalkylether macromer having two polymerizable groups
    Patent number: 5962611
    Abstract: A macromer of formula (I) is described: Q-(PFPE-L).sub.n-1 -PFPE-Q, wherein n>1.0; PFPE may be the same or different and is a perfluorinated polyether of formula (II): --OCH.sub.2 CF.sub.2 O(CF.sub.2 CF.sub.2 O).sub.x (CF.sub.2 O).sub.y CF.sub.2 CH.sub.2 O--, wherein the CF.sub.2 CF.sub.2 O and CF.sub.2 O units may be randomly distributed or distributed as blocks throughout the chain and wherein x and y may be the same or different such that the molecular weight of the PFPE is in the range of from 242 to 4,000; L is a difunctional linking group; and Q may be the same or different and is a polymerizable group. The macromer may be used preferably in the production of contact lenses.
    Type: Grant
    Filed: January 26, 1998
    Date of Patent: October 5, 1999
    Assignees: Novartis AG, Commonwealth Scientific and Industrial Research Organisation
    Inventors: Gordon Francis Meijs, Bronwyn Glenice Laycock, Madeleine Clare Griffiths, Edith Cheong