Patent US3915609A successfully refreshed from Google Patents.
US3915609A
Expired / Lapsed
US
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Molds for casting silicone rubber contact lenses
Assignee: American Optical Corp
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Filing: 1974-03-18
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Granted: 1975-10-28
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Expires: 1994-03-18
Abstract
Abstract A mold for casting contact lenses from an unpolymerized resin such as silicone gum wherein the resin is polymerized by high energy radiation such as an electron beam. One side of the mold is a cap capable of transmitting radiation, which is positioned by a mandrel while the resin is being cast. The mandrel is removed while radiation is applied. Silicone contact lenses cured have substantially greater flexibility at the periphery than at the center may be produced by decreasing the amount of radiation applied to the periphery of the lens.
Inventors
- 👤 Charles C Robinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:20
CPC Classifications
B; B29; B29D; B29D11/00; B29D11/00009; B29D11/00038; B29D11/00057; Y; Y10; Y10S; Y10S425/00; Y10S425/808
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
92 words
MOLDING APPARATUS FOR SEQUENTIALLY SHAPING AND CURING A CONTACT LENS OF A SILICONE RESIN WITH A HIGH ENERGY PARTICLE BEAM WHICH COMPRISES: A. A FIRST MOLD MEMBER HAVING A MOLDING SURFACE, B. A SECOND MOLD HAVING A MOLDING SURFACE DEFINING A MOLD CAVITY IN COOPERATION WITH SAID FIRST MOLD MEMBER, SAID SECOND MOLD MEMBER HAVING A SURFACE EXTERIOR TO SAID MOLD CASTING AND SPACED FROM SAID MOLDING SURFACE THEREOF AND BEING CONSTRUCTED OF A MATERIAL TRANSMITTING THE HIGH ENERGY PARTICLE BEAM, A MATERIAL THICKNESS BETWEEN MOLDING AND EXTERIOR SURFACES BEING SELECTED TO
Claim 2
Dependent Claim
92 words
MOLDING APPARATUS FOR SEQUENTIALLY SHAPING AND CURING A CONTACT LENS OF A SILICONE RESIN WITH A HIGH ENERGY PARTICLE BEAM WHICH COMPRISES: A. A FIRST MOLD MEMBER HAVING A MOLDING SURFACE, B. A SECOND MOLD HAVING A MOLDING SURFACE DEFINING A MOLD CAVITY IN COOPERATION WITH SAID FIRST MOLD MEMBER, SAID SECOND MOLD MEMBER HAVING A SURFACE EXTERIOR TO SAID MOLD CASTING AND SPACED FROM SAID MOLDING SURFACE THEREOF AND BEING CONSTRUCTED OF A MATERIAL TRANSMITTING THE HIGH ENERGY PARTICLE BEAM, A MATERIAL THICKNESS BETWEEN MOLDING AND EXTERIOR SURFACES BEING SELECTED TO
Claim 3
Dependent Claim
23 words
The apparatus of claim 1 wherein said first mold member is a male member and the second mold member is a female member.
Claim 4
Dependent Claim
15 words
The apparatus of claim 1 further including means for generating a high energy electron beam.
Claim 5
Dependent Claim
14 words
The apparatus of claim 3 wherein said means is a Van de Graaff generator.
Claim 6
Dependent Claim
26 words
The apparatus of claim 1 further including a gasket member positioned between said first and second mold members to shape the edge of said contact lens.
Claim 7
Dependent Claim
12 words
The apparatus of claim 1 wherein said second mold member is metal.
Claim 8
Dependent Claim
31 words
The apparatus of claim 6 wherein the metal is stainless steel, the thickness is about 0.5 to 2.0 mm. and the particle beam has an energy level of about 3.5 MeV.
Claim 9
Dependent Claim
13 words
The apparatus of claim 1 wherein the second mold member is fused quartz.
Claim 10
Dependent Claim
25 words
The apparatus of claim 8 wherein the thickness is about 1 to 10mm. and the particle beam has an energy level of about 3.5 MeV.
Claim 11
Dependent Claim
12 words
The apparatus of claim 1 wherein the second mold member is glass.
Claim 12
Dependent Claim
23 words
The apparatus of claim 10 wherein the thickness is about 3mm. and the particle beam has an energy level of about 3.5 MeV.
Claim 13
Dependent Claim
24 words
The apparatus of claim 1 wherein the thickness of the second member is greater in one portion than the remainder of said second member.
Claim 14
Dependent Claim
26 words
The apparatus of claim 1 wherein the thickness at the peripheral portion of the cavity is greater than the thickness at the center of the lens.
References Cited (Backward Citations)
US2332674A
Cited
US2432668A
Cited
US2532501A
Cited
US2635289A
Cited
US2640227A
Cited
US3221083A
Cited
US3093447A
Cited
US3454685A
Cited
US3454686A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-10-27 | 1979-04-28 | 1979-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-27 | 1983-04-28 | 1983-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-27 | 1987-04-28 | 1987-10-28 | $7700.00 | Window Closed / Lapsed |