US4252421A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Contact lenses with a colored central area
Assignee: MC CARRY JOHN D
•
Filing: 1978-11-09
•
Granted: 1981-02-24
•
Expires: 1998-11-09
Abstract
Abstract Contact lenses and a method of preparing the same in which a central area tinted with particular polymer bound or water insoluble colorants are disclosed.
Inventors
- 👤 William M. Foley, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:30
CPC Classifications
G; G02; G02B; G02B1/00; G02B1/04; G02B1/041; G02B1/043; B; B29; B29D; B29D11/00; B29D11/00009; B29D11/00317; G02C; G02C7/00; G02C7/02; G02C7/021
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
55 words
In a contact lens comprising a central core element and an annular hydrogel soft lens element bonded to and surrounding the core element, the improvement wherein the central core is comprised of water insoluble colorant dispersed throughout the polymer forming the central core of lens element, the colorant consisting essentially of water insoluble copper phthalocyanine.
Claim 2
Dependent Claim
55 words
In a contact lens comprising a central core element and an annular hydrogel soft lens element bonded to and surrounding the core element, the improvement wherein the central core is comprised of water insoluble colorant dispersed throughout the polymer forming the central core of lens element, the colorant consisting essentially of water insoluble copper phthalocyanine.
Claim 3
Dependent Claim
55 words
In a contact lens comprising a central core element and an annular hydrogel soft lens element bonded to and surrounding the core element, the improvement wherein the central core is comprised of water insoluble colorant dispersed throughout the polymer forming the central core of lens element, the colorant consisting essentially of water insoluble silicon phthalocyanine.
Claim 4
Dependent Claim
55 words
In a contact lens comprising a central core element and an annular hydrogel soft lens element bonded to and surrounding the core element, the improvement wherein the central core is comprised of water insoluble colorant dispersed throughout the polymer forming the central core of lens element, the colorant consisting essentially of water insoluble silicon phthalocyanine.
Claim 5
Dependent Claim
55 words
In a contact lens comprising a central core element and an annular hydrogel soft lens element bonded to and surrounding the core element, the improvement wherein the central core is comprised of water insoluble colorant dispersed throughout the polymer forming the central core of lens element, the colorant consisting essentially of water insoluble phthalocyanine colorant.
Claim 6
Dependent Claim
55 words
In a contact lens comprising a central core element and an annular hydrogel soft lens element bonded to and surrounding the core element, the improvement wherein the central core is comprised of water insoluble colorant dispersed throughout the polymer forming the central core of lens element, the colorant consisting essentially of water insoluble phthalocyanine colorant.
Claim 7
Dependent Claim
58 words
In a contact lens comprising a central core element and an annular hydrogel soft lens element bonded to and surrounding the core element, the improvement wherein the central core element is colored with a dye polymerically bonded to the lens polymer, said dye consisting essentially of silicon phthalocyanine polymerically bonded through a polymerizable group to the lens polymer.
Claim 8
Dependent Claim
58 words
In a contact lens comprising a central core element and an annular hydrogel soft lens element bonded to and surrounding the core element, the improvement wherein the central core element is colored with a dye polymerically bonded to the lens polymer, said dye consisting essentially of silicon phthalocyanine polymerically bonded through a polymerizable group to the lens polymer.
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) | 1984-02-24 | 1984-08-25 | 1985-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-02-24 | 1988-08-25 | 1989-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-02-24 | 1992-08-25 | 1993-02-24 | $7700.00 | Window Closed / Lapsed |