US4869588A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non-progressive multifocal ophthamic lenses
Assignee: OPTICORP Inc 6555 NW 9TH AVE SUITE 208 FORT LAUDERDALE FL 33309 A CORP OF FL
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Filing: 1988-05-04
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Granted: 1989-09-26
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Expires: 2008-05-04
Abstract
Abstract The present invention relates to a multifocal ophtalmic lens which comprises a first substantially spherical area for distance viewing, a second substantially spherical area for near viewing having a desired width and height and being surrounded on a plurality of sides by the first area, and relatively narrow areas intermediate the first and second areas for blending the second area into the first area. The lens design of the present invention may also include an optional third substantially spherical area adjacent the second area for increasing the near viewing range in a substantially contiguous manner.
Inventors
- 👤 Philip M. Frieder
- 👤 Michael Walach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:49
CPC Classifications
G; G02; G02C; G02C7/00; G02C7/02; G02C7/06
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
72 words
A non-progressive multifocal ophthalmic lens which comprises a first substantially spherical, clear area for distance viewing, a second substantially spherical, clear area for near viewing, said second area having a desired width and depth and being surrounded on a plurality of sides by said first area, and areas intermediate said first and second areas for blending said second area into said first area, said lens being characterized by substantially no image jump.
Claim 2
Dependent Claim
72 words
A non-progressive multifocal ophthalmic lens which comprises a first substantially spherical, clear area for distance viewing, a second substantially spherical, clear area for near viewing, said second area having a desired width and depth and being surrounded on a plurality of sides by said first area, and areas intermediate said first and second areas for blending said second area into said first area, said lens being characterized by substantially no image jump.
Claim 3
Dependent Claim
17 words
A lens in accordance with claim 1 wherein said second area has a substantially flat top portion.
Claim 4
Dependent Claim
22 words
A lens in accordance with claim 2 wherein said second area is surrounded on at least three sides by said first area.
Claim 5
Dependent Claim
40 words
A lens in accordance with claim 3 which further comprises a third substantially spherical, clear area for intermediate viewing, said third area lying adjacent said second area and forming with said second area a substantially contiguous range of near vision.
Claim 6
Dependent Claim
38 words
A lens in accordance with claim 4 wherein said third area has a substantially flat top portion and is surrounded by said first area on at least three sides, said third area being blended into said first area.
Claim 7
Dependent Claim
29 words
A lens in accordance with claim 4 wherein said second and third areas each have a width in the range of from about 18 mm to about 45 mm.
Claim 8
Dependent Claim
25 words
A lens in accordance with claim 5 wherein said blending areas do not extend to the edges of said lens so as to minimize distortion.
Claim 9
Dependent Claim
27 words
A lens in accordance with claim 7 wherein said blending areas are each formed by sinusoidal curves and each have a width less than about 10 mm.
Claim 10
Dependent Claim
16 words
A lens in accordance with claim 4 wherein said second and third area are angled nasalward.
Claim 11
Dependent Claim
63 words
A lens in accordance with claim 4 wherein each of said first, second and third areas is defined by an arc, and a portion of said arc defining said first area coincides with a portion of said arc defining said third area and a portion of said arc defining said third area coincides with a portion of said arc defining said second area.
Claim 12
Dependent Claim
36 words
A lens in accordance with claim 10 wherein said first area has a central axis with its center lying along said axis and said second and third areas each having a center lying below said axis.
Claim 13
Dependent Claim
142 words
A non-progressive bifocal ophthalmic lens which comprises: a first substantially spherical, clear area for distance viewing; said first area being defined by a first arc having a first radius; a second substantially spherical, clear area for near viewing; said second area having a desired width and height and being surrounded on a plurality of sides by said first area; said second area being defined by a second arc having a second radius different from said first radius; said first and second areas coinciding for some distance and thereby negating any need to blend a first portion of said second area into said first area; and areas intermediate said first and second areas for blending said second area into said first area where said first and second arcs do not coincide, said lens being characterized by the absence of substantially any image jump.
Claim 14
Dependent Claim
142 words
A non-progressive bifocal ophthalmic lens which comprises: a first substantially spherical, clear area for distance viewing; said first area being defined by a first arc having a first radius; a second substantially spherical, clear area for near viewing; said second area having a desired width and height and being surrounded on a plurality of sides by said first area; said second area being defined by a second arc having a second radius different from said first radius; said first and second areas coinciding for some distance and thereby negating any need to blend a first portion of said second area into said first area; and areas intermediate said first and second areas for blending said second area into said first area where said first and second arcs do not coincide, said lens being characterized by the absence of substantially any image jump.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-09-25 | 1993-03-27 | 1993-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-09-25 | 1997-03-27 | 1997-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-09-25 | 2001-03-27 | 2001-09-26 | $7700.00 | Window Closed / Lapsed |