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:
Apr. 19, 1988
Filed:
May. 21, 1986
Tetsuro Izumitani, Hodokubo, Tokyo, JP;
Shinichiro Hirota, Mejirodai, Hachioji-shi, Tokyo, JP;
Helmuth E Meissner, Tachikawa-shi, Tokyo, JP;
Kishio Sugawara, Nishitama-gun; Tokyo, JP;
Other;
Abstract
Optical lenses high in configurational accuracy with smooth surfaces are press molded in a carefully finished, polished and properly dimensioned mold preferably in a non-oxidizing atmosphere. The molding operation includes placing a quantity of glass having an internal viscosity of at least about 10.sup.6 poises in such a mold while maintaining the mold at a temperature at least equal to the glass transition temperature and thereafter passing the glass into a lens of predetermined configuration at a pressure of at least 100 Kg/cm.sup.2. Performing procedures are also disclosed.