The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 13, 2009
Filed:
Jun. 05, 2007
Applicants:
Karl Skjonnemand, Holburn, GB;
Owain Llyr Parri, Poole, GB;
Donald Gordon Graham, Corfe Mullen, GB;
Tara Perrett, Bournemouth, GB;
Inventors:
Karl Skjonnemand, Holburn, GB;
Owain Llyr Parri, Poole, GB;
Donald Gordon Graham, Corfe Mullen, GB;
Tara Perrett, Bournemouth, GB;
Assignee:
Merck Patent GmbH, Darmstadt, DE;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02F 1/1335 (2006.01);
U.S. Cl.
CPC ...
Abstract
The invention relates to a negative birefringent retardation film comprising polymerised liquid crystal (LC) material with helically twisted structure and planar orientation, its use in compensators and electrooptical displays like liquid crystal displays, and to compensators and liquid crystal displays comprising such a negative retardation film.