Patent US4883350A successfully refreshed from Google Patents.
US4883350A
Expired / Lapsed
US
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Contact lens providing a central spherical region bounded by a circumscribing aspherical region
Assignee: Individual
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Filing: 1986-05-07
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Granted: 1989-11-28
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Expires: 2006-05-07
Abstract
Abstract Contact lens (1) comprising a rear contact surface (2) presenting a spherical region described by an arc of a circle passing by the vertex (S). In order to improve the optical properties while improving the adaptability and compatibility, the contact lens (1) presents an aspherical region adjacent to the spherical region; the curve representing the aspherical region and the arc of a circle representing the spherical region have in the transition a substantially equal curvature radius (R o ) and a substantially equal slope.
Inventors
- 👤 Dieter Muckenhirn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:58
CPC Classifications
G; G02; G02C; G02C7/00; G02C7/02; G02C7/04
Claims Analysis
Total Claims: 32
Claim 1
Independent Claim
88 words
A contact lens comprising a rear surface presenting a central spherical region described by an arc passing through the vertex, characterized in that said central spherical region is circumscribed by an aspherical region defined by a curve adjacent the spherical region, said curve and said arc having a substantially equal radius of curvature and a substantially equal gradient in the area of transition and further characterized in that the arc extends up to an angle in the range of 10° to 20° measured from the center of curvature.
Claim 2
Dependent Claim
88 words
A contact lens comprising a rear surface presenting a central spherical region described by an arc passing through the vertex, characterized in that said central spherical region is circumscribed by an aspherical region defined by a curve adjacent the spherical region, said curve and said arc having a substantially equal radius of curvature and a substantially equal gradient in the area of transition and further characterized in that the arc extends up to an angle in the range of 10° to 20° measured from the center of curvature.
Claim 3
Dependent Claim
87 words
A contact lens comprising a rear surface defining a central spherical region described by an arc passing through the vertex and an aspherical region circumscribing said central spherical region defined by a curve adjacent the spherical region, said arc and said curve having substantially equal radius of curvature and a substantially equal gradient in the area of transition from one to the other, characterized in that the arc extends up to an angle in the region of from 10° to 20° measured from the center of curvature.
Claim 4
Dependent Claim
87 words
A contact lens comprising a rear surface defining a central spherical region described by an arc passing through the vertex and an aspherical region circumscribing said central spherical region defined by a curve adjacent the spherical region, said arc and said curve having substantially equal radius of curvature and a substantially equal gradient in the area of transition from one to the other, characterized in that the arc extends up to an angle in the region of from 10° to 20° measured from the center of curvature.
Claim 5
Dependent Claim
22 words
A contact lens according to claim 2 characterized in that the arc extends up to an angle in the order of 15°.
Claim 6
Dependent Claim
28 words
A contact lens according to claim 2 characterized in that the eccentricity of the arc is in the range of 0.3 to 1 at an angle of α=30°.
Claim 7
Dependent Claim
28 words
A contact lens according to claim 3 characterized in that the eccentricity of the arc is in the range of 0.3 to 1 at an angle of α=30°.
Claim 8
Dependent Claim
18 words
A contact lens according to claim 4 characterized in that the eccentricity of the curve is approximately 0.6.
Claim 9
Dependent Claim
18 words
A contact lens according to claim 5 characterized in that the eccentricity of the curve is approximately 0.6.
Claim 10
Dependent Claim
33 words
A contact lens according to claim 2 characterized in that the radius of the arc of a spherical area which passes through the vertex is in the order of 6 to 9 millimeters.
Claim 11
Dependent Claim
33 words
A contact lens according to claim 3 characterized in that the radius of the arc of the spherical area which passes through the vertex is in the order of 6 to 9 millimeters.
Claim 12
Dependent Claim
33 words
A contact lens according to claim 4 characterized in that the radius of the arc of the spherical area which passes through the vertex is in the order of 6 to 9 millimeters.
Claim 13
Dependent Claim
33 words
A contact lens according to claim 5 characterized in that the radius of the arc of the spherical area which passes through the vertex is in the order of 6 to 9 millimeters.
Claim 14
Dependent Claim
100 words
A contact lens comprising a rear surface defining a central spherical region described by an arc passing through the vertex and an aspherical region circumscribing said central spherical region defined by a curve adjacent the spherical region, said arc and said curve having substantially equal radius of curvature and a substantially equal gradient in the area of transition from one to the other, characterized in that said curve corresponds to a power series of the third degree and that the arc extends up to an angle in the range of from 10° to 20° measured from the center of curvature.
Claim 15
Dependent Claim
100 words
A contact lens comprising a rear surface defining a central spherical region described by an arc passing through the vertex and an aspherical region circumscribing said central spherical region defined by a curve adjacent the spherical region, said arc and said curve having substantially equal radius of curvature and a substantially equal gradient in the area of transition from one to the other, characterized in that said curve corresponds to a power series of the third degree and that the arc extends up to an angle in the range of from 10° to 20° measured from the center of curvature.
Claim 16
Dependent Claim
22 words
A contact lens according to claim 12 characterized in that the arc extends up to an angle in the order of 15°.
Claim 17
Dependent Claim
31 words
A contact lens according to claim 3, 6 or 12 characterized in that the eccentricity of the arc is in the range of 0.3 to 1 at an angle of α=30°.
Claim 18
Dependent Claim
28 words
A contact lens according to claim 13 characterized in that the eccentricity of the arc is in the range of 0.3 to 1 at an angle of α=30°.
Claim 19
Dependent Claim
18 words
A contact lens according to claim 14 characterized in that the eccentricity of the curve is approximately 0.6.
Claim 20
Dependent Claim
18 words
A contact lens according to claim 15 characterized in that the eccentricity of the curve is approximately 0.6.
Claim 21
Dependent Claim
33 words
A contact lens according to claim 12 characterized in that the radius of the arc of a spherical area which passes through the vertex is in the order of 6 to 9 millimeters.
Claim 22
Dependent Claim
33 words
A contact lens according to claim 13 characterized in that the radius of the arc of the spherical area which passes through the vertex is in the order of 6 to 9 millimeters.
Claim 23
Dependent Claim
33 words
A contact lens according to claim 14 characterized in that the radius of the arc of the spherical area which passes through the vertex is in the order of 6 to 9 millimeters.
Claim 24
Dependent Claim
33 words
A contact lens according to claim 15 characterized in that the radius of the arc of the spherical area which passes through the vertex is in the order of 6 to 9 millimeters.
Claim 25
Dependent Claim
100 words
A contact lens comprising a rear surface defining a central spherical region described by an arc passing through the vertex and an aspherical region circumscribing said central spherical region defined by a curve adjacent the spherical region, said arc and said curve being of substantially equal radius of curvature and substantially equal gradient in the area of transition from one to the other and further characterized in that the curve corresponds to a power series of the third degree and that the eccentricity of the curve is in the range of from 0.3 to 1 at an angle of α=30°.
Claim 26
Dependent Claim
100 words
A contact lens comprising a rear surface defining a central spherical region described by an arc passing through the vertex and an aspherical region circumscribing said central spherical region defined by a curve adjacent the spherical region, said arc and said curve being of substantially equal radius of curvature and substantially equal gradient in the area of transition from one to the other and further characterized in that the curve corresponds to a power series of the third degree and that the eccentricity of the curve is in the range of from 0.3 to 1 at an angle of α=30°.
Claim 27
Dependent Claim
18 words
A contact lens according to claim 22 characterized in that the eccentricity of the curve is approximately 0.6.
Claim 28
Dependent Claim
33 words
A contact lens according to claim 22 characterized in that the radius of the arc of the spherical area which passes through the vertex is in the order of 6 to 9 millimeters.
Claim 29
Dependent Claim
87 words
A contact lens comprising a rear surface defining a central spherical region described by an arc passing through the vertex and an aspherical region circumscribing said central spherical region defined by a curve adjacent the spherical region, said arc and said curve having substantially equal radius of curvature and substantially equal gradient in the area of transition from one to the other, characterized in that the radius of the arc of the spherical area which passes through the vertex is in order of 6 to 9 millimeters.
Claim 30
Dependent Claim
87 words
A contact lens comprising a rear surface defining a central spherical region described by an arc passing through the vertex and an aspherical region circumscribing said central spherical region defined by a curve adjacent the spherical region, said arc and said curve having substantially equal radius of curvature and substantially equal gradient in the area of transition from one to the other, characterized in that the radius of the arc of the spherical area which passes through the vertex is in order of 6 to 9 millimeters.
Claim 31
Dependent Claim
100 words
A contact lens comprising a rear surface defining a central spherical region described by an arc passing through the vertex and an aspherical region circumscribing said central spherical region defined by a curve adjacent the spherical region, said arc and said curve having substantially equal radius of curvature and substantially equal gradient in the area of transition from one to the other, characterized in that said curve corresponds to a series of the third degree and further characterized in that the arc of the spherical area which passes through the vertex is in the order of 6 to 9 millimeters.
Claim 32
Dependent Claim
100 words
A contact lens comprising a rear surface defining a central spherical region described by an arc passing through the vertex and an aspherical region circumscribing said central spherical region defined by a curve adjacent the spherical region, said arc and said curve having substantially equal radius of curvature and substantially equal gradient in the area of transition from one to the other, characterized in that said curve corresponds to a series of the third degree and further characterized in that the arc of the spherical area which passes through the vertex is in the order of 6 to 9 millimeters.
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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) | 1992-11-27 | 1993-05-29 | 1993-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-11-27 | 1997-05-29 | 1997-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-11-27 | 2001-05-29 | 2001-11-28 | $7700.00 | Window Closed / Lapsed |