US4459246A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Molding contact lenses using a directed stream of gas
Assignee: Sunsoft Corp
•
Filing: 1982-08-26
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Granted: 1984-07-10
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Expires: 2002-08-26
Abstract
Abstract The lens is molded in a concave lens mold, the liquid lens monomer is placed in the concave mold and a controlled stream of gas is directed at the center of the liquid surface and shapes the concave lens surface upon polymerization of the monomer.
Inventors
- 👤 Charles W. Neefe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 01:33
CPC Classifications
B; B29; B29C; B29C43/00; B29C43/32; B29C43/56; B29C43/02; B29C43/10; B29D; B29D11/00; B29D11/00009; B29D11/00038; B29C2043/3205; B29C2043/3222; B29C43/34; B29C2043/345; B29C2043/3461; B29C2043/566; B29C39/00; B29C39/003; B29C39/006; B29K; B29K2105/00; B29K2105/0002; Y; Y10; Y10S; Y10S425/00; Y10S425/808
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
67 words
A method of molding a contact lens having a convex surface molded against a concave lens mold and the concave lens surface shaped by a stream of compressed gas released through a nozzle and directed at the liquid monomer and the gas pressure displaces the liquid lens monomer to form the concave lens surface and allowing the liquid monomer to polymerize and form a solid contact lens.
Claim 2
Independent Claim
67 words
A method of molding a contact lens having a convex surface molded against a concave lens mold and the concave lens surface shaped by a stream of compressed gas released through a nozzle and directed at the liquid monomer and the gas pressure displaces the liquid lens monomer to form the concave lens surface and allowing the liquid monomer to polymerize and form a solid contact lens.
Claim 3
Dependent Claim
23 words
A method of molding a contact lens as in claim 1 wherein the compressed gas is directed at the center of the lens.
Claim 4
Dependent Claim
28 words
A method of molding a contact lens as in claim 1 wherein the lens is rotated around the lens optical axis while the lens is being gas molded.
Claim 5
Dependent Claim
35 words
A method of molding a contact lens as in claim 1 wherein the lens is rotated around the lens optical axis and the compressed air is directed at a point other than the lens center.
Claim 6
Dependent Claim
16 words
A method of molding a lens as in claim 4 wherein multiple gas nozzle are used.
Claim 7
Dependent Claim
17 words
A method of molding a lens as in claim 4 wherein a circular gas nozzle is used.
References Cited (Backward Citations)
US2302020A
Cited
SE192960C1
Cited
US3660545A
Cited
US3699089A
Cited
US3454686A
Cited
US3691263A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-07-10 | 1988-01-09 | 1988-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-10 | 1992-01-09 | 1992-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-10 | 1996-01-09 | 1996-07-10 | $7700.00 | Window Closed / Lapsed |