US4150073A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of controlling the adhesion of a molded plastic lens to the mold
Assignee: BOISSEVAIN Ltd Inc
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Filing: 1978-02-03
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Granted: 1979-04-17
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Expires: 1998-02-03
Abstract
Abstract Controlling the adhesion of cast polymeric optical lenses to a resinous optical mold by exposing the mold surface to monomeric vapors thereby altering the surface characteristics of the resinous mold and increasing the adhesion to the lens material.
Inventors
- 👤 Charles W. Neefe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:23
CPC Classifications
G; G02; G02B; G02B1/00; G02B1/04; G02B1/041; B; B29; B29C; B29C33/00; B29C33/38; B29C33/40; B29C33/56; B29C33/60; B29C33/62; B29C33/64; B29C39/00; B29C39/02; B29D; B29D11/00; B29D11/00009; B29D11/00019; B29D11/00413; B29D11/00432; B29D11/00442; B29D11/00932; B29D11/00942; B29C35/00; B29C35/02; B29C35/08; B29C35/0805; B29C2035/0827; B29K; B29K2033/00; B29K2033/04; B29K2105/00; B29K2105/0002; B29K2823/00; B29K2877/00; B29L; B29L2011/00; B29L2011/0016
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
124 words
A method of increasing the adhesion between a resinous lens mold and a polymerized polymeric lens material to allow the opposing side of the polymeric lens material to be cut and polished while supported within the resinous mold by the steps of: providing a resinous lens mold having a negative curved optical surface, exposing the resinous mold surface to the vapor of a volatile monomer, filling the resinous mold with a liquid lens monomer capable of polymerization, polymerizing the lens monomer to form a solid having a first optical surface with a positive optical curve adhering to the resinous mold, cutting and polishing a second optical surface on the opposing side of the lens material and then removing the lens from the resinous mold.
Claim 2
Independent Claim
124 words
A method of increasing the adhesion between a resinous lens mold and a polymerized polymeric lens material to allow the opposing side of the polymeric lens material to be cut and polished while supported within the resinous mold by the steps of: providing a resinous lens mold having a negative curved optical surface, exposing the resinous mold surface to the vapor of a volatile monomer, filling the resinous mold with a liquid lens monomer capable of polymerization, polymerizing the lens monomer to form a solid having a first optical surface with a positive optical curve adhering to the resinous mold, cutting and polishing a second optical surface on the opposing side of the lens material and then removing the lens from the resinous mold.
Claim 3
Dependent Claim
31 words
The method of claim 1 wherein the lens material is polymethylmethacrylate, the resinous lens mold is nylon and the resinous nylon mold surface is exposed to the vapor of ethylene dimethacrylate.
Claim 4
Dependent Claim
13 words
A method as in claim 1 wherein the lens material is hydroxyethyl methacrylate.
Claim 5
Dependent Claim
12 words
A method as in claim 1 wherein the mold material is polymethylpentene.
Claim 6
Dependent Claim
19 words
A method as in claim 1 wherein the mold material is polymethylpentene and the lens material is hydroxyethyl methacrylate.
Claim 7
Dependent Claim
12 words
A method as in claim 1 wherein the lens material is methylmethacrylate.
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) | 1982-04-16 | 1982-10-16 | 1983-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-04-16 | 1986-10-16 | 1987-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-04-16 | 1990-10-16 | 1991-04-17 | $7700.00 | Window Closed / Lapsed |