US4209289A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Contact lens mold
Assignee: American Optical Corp
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Filing: 1979-05-14
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Granted: 1980-06-24
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Expires: 1999-05-14
Abstract
Abstract A two piece contact lens mold having a pair of blunt, continuous mating surfaces extending around the periphery of the mold cavity is disclosed. Parameters for mold materials and important dimensions are also disclosed. The mold can produce finished contact lenses which do not require further machining.
Inventors
- 👤 Paul D. Newcomb
- 👤 Ethan C. Hopkins
- 👤 Paul A. Davignon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:00
CPC Classifications
B; B29; B29C; B29C39/00; B29C39/22; B29C39/26; B29C39/28; B29C33/00; B29C33/0011; B29C33/005; B29D; B29D11/00; B29D11/00009; B29D11/00038; B29D11/00057; B29K; B29K2023/00; B29K2023/10; B29K2023/12; B29L; B29L2011/00; B29L2011/0016; B29L2011/0041; Y; Y10; Y10S; Y10S425/00; Y10S425/808
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
285 words
A disposable contact lens mold for casting a finished, water swellable, soft contact lens, the lens having a chosen diameter, a posterior surface, a finished edge and an anterior surface which comprises, a hollow, frustroconical male member having a convex molding surface at the narrow end, said convex molding surface having a first chosen radius for shaping the posterior surface, a first longitudinal axis extending through said member, a solid, continuous, ring-shaped, rigid mold mating portion extending from the narrow end of said male member radially inwardly toward said convex molding surface, said mating portion having first and second edges defining a first mating surface, and a concave junction surface extending from said convex molding surface to said first mating surface, said junction surface having a second chosen radius for shaping the finished edge, a hollow, inverted frustroconical female member having a cavity at the narrow end for receiving said male member, said cavity having a centrally located concave molding surface, said concave molding surface having a third chosen radius for shaping the anterior surface of said lens, a second longitudinal axis extending through said female member, a second mating surface extending radially outwardly from the periphery of said concave molding surface, said second mating surface having an inner edge and an outer edge, and an outwardly tapering wall extending from said outer edge to the narrow end of said female member, said first edge of said male member and said inner edge of said female member having an identical diameter, said second edge having a diameter chosen to provide an interference fit with said outer edge when said male and female member are united thereby providing coincidence of said first and second longitudinal axes.
Claim 2
Dependent Claim
285 words
A disposable contact lens mold for casting a finished, water swellable, soft contact lens, the lens having a chosen diameter, a posterior surface, a finished edge and an anterior surface which comprises, a hollow, frustroconical male member having a convex molding surface at the narrow end, said convex molding surface having a first chosen radius for shaping the posterior surface, a first longitudinal axis extending through said member, a solid, continuous, ring-shaped, rigid mold mating portion extending from the narrow end of said male member radially inwardly toward said convex molding surface, said mating portion having first and second edges defining a first mating surface, and a concave junction surface extending from said convex molding surface to said first mating surface, said junction surface having a second chosen radius for shaping the finished edge, a hollow, inverted frustroconical female member having a cavity at the narrow end for receiving said male member, said cavity having a centrally located concave molding surface, said concave molding surface having a third chosen radius for shaping the anterior surface of said lens, a second longitudinal axis extending through said female member, a second mating surface extending radially outwardly from the periphery of said concave molding surface, said second mating surface having an inner edge and an outer edge, and an outwardly tapering wall extending from said outer edge to the narrow end of said female member, said first edge of said male member and said inner edge of said female member having an identical diameter, said second edge having a diameter chosen to provide an interference fit with said outer edge when said male and female member are united thereby providing coincidence of said first and second longitudinal axes.
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) | 1983-06-24 | 1983-12-24 | 1984-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-06-24 | 1987-12-24 | 1988-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-06-24 | 1991-12-24 | 1992-06-24 | $7700.00 | Window Closed / Lapsed |