(under subclass 159) Subject matter including processes of making ophthalmic lenses as there defined and not otherwise
classifiable.
(1) Note. Class 451 provides for grinding or polishing a lens; Class 65 provides for fusion bonding of glass lenses; while Class 156 provides for adhesive bonding of such lenses. The patents classified in this subclass 177 usually claim combinations of these methods, which are beyond the scope of any one of the above classes. See also the reference to these classes below.
(2) Note. This subclass includes processes for forming contact lenses adapted to be in contact with the eyeball, as opposed to the fitting of contact lenses to the eye which are classified in subclass 40 above.
SEE OR SEARCH THIS CLASS, SUBCLASS:
247, for contact lens fitting. See also (2) Note above.
SEE OR SEARCH CLASS 65, Glass Manufacturing,
36+, for fusion bonding of glass.
156, Adhesive Bonding and Miscellaneous Chemical Manufacture,
99+, for optically transparent glass sandwich making.
427, Coating Processes,
162+, for coating processes, per se, wherein the product is an electrical element.
451, Abrading,
42+, for a lens abrading process and subclass 57 for such a process involving distinct abrading areas or steps.
501, Compositions: Ceramic,
11+, for glass composition; and especially subclasses 40+ for lead containing glass.
