Patent US5071244A successfully refreshed from Google Patents.
US5071244A
Expired / Lapsed
US
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Soft bifocal contact lens
Assignee: Individual
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Filing: 1990-10-03
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Granted: 1991-12-10
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Expires: 2010-10-03
Abstract
Abstract A soft bifocal contact lens has a carrier lens of soft plastic material shaped and dimensioned to an eye of a user. A central portion of the carrier lens is formed to provide distance-vision correction for the eye of the user. An auxiliary lens smaller than the carrier lens is attached adjacent a lower edge of the carrier lens, and formed to provide near-vision correction for the eye of the user. The auxiliary lens has a contour of a lower edge thereof for contacting a lower eyelid of the user to translate the carrier lens upward when the user moves the eye downward for close vision.
Inventors
- 👤 Richard M. Ross
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:44
CPC Classifications
G; G02; G02C; G02C7/00; G02C7/02; G02C7/04; G02C7/049; G02C7/041; G02C7/043; G02C7/045; G02C2202/00; G02C2202/16
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
104 words
A soft bifocal contact lens comprising: a generally concavo-convex carrier lens of soft plastic material shaped and dimensioned to an eye of a user; a central portion of said carrier lens formed to provide distance-vision correction for the eye of the user; and an auxiliary lens smaller than said carrier lens attached adjacent a lower edge of said carrier lens, and formed to provide near-vision correction for the eye of the user, said auxiliary lens having a contour of a lower edge thereof for contacting a lower eyelid of the user for translating said carrier lens upward when the user moves the eye downward.
Claim 2
Dependent Claim
104 words
A soft bifocal contact lens comprising: a generally concavo-convex carrier lens of soft plastic material shaped and dimensioned to an eye of a user; a central portion of said carrier lens formed to provide distance-vision correction for the eye of the user; and an auxiliary lens smaller than said carrier lens attached adjacent a lower edge of said carrier lens, and formed to provide near-vision correction for the eye of the user, said auxiliary lens having a contour of a lower edge thereof for contacting a lower eyelid of the user for translating said carrier lens upward when the user moves the eye downward.
Claim 3
Dependent Claim
18 words
The lens as defined in claim 1 in which said auxiliary lens is formed from a hard plastic.
Claim 4
Dependent Claim
15 words
The lens as defined in claim 2 in which said hard plastic is a silicone-acrylic.
Claim 5
Dependent Claim
16 words
The lens as defined in claim 2 in which said hard plastic is a fluoropolymer material.
Claim 6
Dependent Claim
20 words
The lens as defined in claim 1 in which said auxiliary lens is attached to said carrier lens by cementing.
Claim 7
Dependent Claim
16 words
The lens as defined in claim 1 in which said soft plastic is a hydrogel material.
Claim 8
Dependent Claim
35 words
The lens as defined in claim 6 in which said material is selected from the group consisting of low water nonionic polymers, high water nonionic polymers, low water ionic polymers, and high water ionic polymers.
Claim 9
Dependent Claim
100 words
A soft bifocal contact lens comprising: a generally concavo-convex carrier lens of soft plastic material shaped and dimensioned to an eye of a user; a central portion of said carrier lens formed to provide distance-vision correction for the eye of the user; and an auxiliary lens formed in said carrier lens adjacent a lower edge thereof, and shaped to provide near-vision correction for the eye of the user, said auxiliary lens having a contour of a lower edge thereof for contacting a lower eyelid of the user for translating said carrier lens upward when the user moves the eye downward.
Claim 10
Dependent Claim
100 words
A soft bifocal contact lens comprising: a generally concavo-convex carrier lens of soft plastic material shaped and dimensioned to an eye of a user; a central portion of said carrier lens formed to provide distance-vision correction for the eye of the user; and an auxiliary lens formed in said carrier lens adjacent a lower edge thereof, and shaped to provide near-vision correction for the eye of the user, said auxiliary lens having a contour of a lower edge thereof for contacting a lower eyelid of the user for translating said carrier lens upward when the user moves the eye downward.
Claim 11
Dependent Claim
44 words
The lens as defined in claim 6 in which said carrier lens and said auxiliary lens are formed from a material selected from the group consisting of low water nonionic polymers, high water nonionic polymers, low water ionic polymers, and high water ionic polymers.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-12-09 | 1995-06-10 | 1995-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-12-09 | 1999-06-10 | 1999-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-12-09 | 2003-06-10 | 2003-12-10 | $7700.00 | Window Closed / Lapsed |