Granted Patent
Utility
US 6,576,162 · App. 09/846,118
Method for injection molding of weld line free thermoplastic articles such as ophthalmic lenses
Inventors:
Hao-Wen Chiu, Hsinjin Yang
Patented Case
View Patent ↗
Granted: Jun 10, 2003
Filed: Apr 30, 2001
Inventors
Hao-Wen Chiu
Hsinjin Yang
Assignee (at issue)
Essilor International (Compagnie Generale d'Optique)
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.