US PATENT SUBCLASS 351 / 159
.~ Ophtahalmic lenses or blanks

Current as of: June, 1999
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351 /   HD   OPTICS: EYE EXAMINING, VISION TESTING AND CORRECTING

41  DF  SPECTACLES AND EYEGLASSES {29}
159.~ Ophtahalmic lenses or blanks {10}
160 R  DF  .~.~> Eye contact type {3}
163  DF  .~.~> With light filtering means {2}
166  DF  .~.~> With lens protective layers
167  DF  .~.~> Cataract correction type
168  DF  .~.~> Multifocal {4}
173  DF  .~.~> Image size (aniseikonia) correction
174  DF  .~.~> With beveled, polished or reinforced edges
175  DF  .~.~> Prismatic type
176  DF  .~.~> Focus and/or astigmatism correction
177  DF  .~.~> Methods

DEFINITION

Classification: 351/159

(under subclass 41) Subject matter is limited to lenses with specific optical characteristics for use in spectacles or eyeglasses, said lenses having surfaces of spherical, cylindrical or toric curvatures for aiding vision or for correcting focal errors of the eye.

(1) Note. The subject matter here is distinct from and does not include multiple component or compound lens systems designed for example for taking and exhibiting pictures or for use in binoculars, telescopes, and microscopes. See Class 359, Optics: Systems (Including Communication) and Elements, subclasses 362+ and 642+ for this subject matter generally.

(2) Note. The indented subclass 177 includes processes of making ophthalmic lenses as defined above and methods of uniting optical elements to form multifocal lenses wherein steps of grinding or finishing subsequent to uniting are included.

SEE OR SEARCH THIS CLASS, SUBCLASS:

41+, for spectacles including lenses as above defined.

SEE OR SEARCH CLASS

2, Apparel, 426+, for goggles; and subclasses 12+ for eye shades.

359, Optics: Systems (Including Communication) and Elements,

362+, for compound lens systems generally. See also (1) Note above.