Patent US1994228A successfully refreshed from Google Patents.
US4116753A
Expired / Lapsed
US
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Method for the manufacture of optical mold for reproducing curved surfaces having the same shape as an optical prototype
Assignee: Olympus Corp
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Filing: 1977-06-07
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Granted: 1978-09-26
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Expires: 1997-06-07
Abstract
Abstract A sturdy optical mold for reproducing optical curved surfaces in the shape corresponding to that of an optical prototype comprising a resin layer formed on a base and a metallic layer formed on said resin layer, and a method for manufacturing an optical mold for reproducing optical curved surfaces in the shape corresponding to that of an optical prototype comprising forming layers of different metals on the surface of an optical prototype, dissolving one of said layers for releasing the other layer and fixing said released layer onto a base with a bonding agent.
Inventors
- 👤 Tsutomu Tojyo
- 👤 Shozo Sato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:23
CPC Classifications
B; B29; B29D; B29D11/00; B29D11/00009; Y; Y10; Y10S; Y10S425/00; Y10S425/808
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
77 words
A method for manufacturing an optical mold for reproducing optical curved surfaces in the shape corresponding to that of an optical prototype comprising: forming a first layer of a metal on an optical prototype, forming on said first layer a second layer of a metal different from said first layer of metal, dissolving said first layer for releasing said second layer from said optical prototype and bonding said released second layer onto the surface of a base.
Claim 2
Independent Claim
77 words
A method for manufacturing an optical mold for reproducing optical curved surfaces in the shape corresponding to that of an optical prototype comprising: forming a first layer of a metal on an optical prototype, forming on said first layer a second layer of a metal different from said first layer of metal, dissolving said first layer for releasing said second layer from said optical prototype and bonding said released second layer onto the surface of a base.
Claim 3
Dependent Claim
42 words
A method for manufacturing an optical mold for forming optical curved surfaces in the shape corresponding to that of an optical prototype according to claim 1 wherein copper is used as said first metal and chromium is used as said second metal.
Claim 4
Independent Claim
86 words
A method for manufacturing an optical mold for reproducing optical curved surfaces in the shape corresponding to that of an optical prototype comprising: forming a first layer of metal on the surface of an optical prototype, forming on said first layer a second layer of metal different from said first layer of metal, bonding a base onto said second layer of metal with a bonding agent interposed therebetween, and dissolving said first layer of metal for releasing said second layer of metal from said optical prototype.
Claim 5
Independent Claim
86 words
A method for manufacturing an optical mold for reproducing optical curved surfaces in the shape corresponding to that of an optical prototype comprising: forming a first layer of metal on the surface of an optical prototype, forming on said first layer a second layer of metal different from said first layer of metal, bonding a base onto said second layer of metal with a bonding agent interposed therebetween, and dissolving said first layer of metal for releasing said second layer of metal from said optical prototype.
Claim 6
Dependent Claim
42 words
A method for manufacturing an optical mold for reproducing optical curves surfaces in the shape corresponding to that of an optical prototype according to claim 3 wherein copper is used as said first metal and chromium is adopted as said second metal.
References Cited (Backward Citations)
US2164010A
Cited
US2734243A
Cited
US2879196A
Cited
US2765248A
Cited
US2851331A
Cited
US3428533A
Cited
US4061518A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-09-25 | 1982-03-27 | 1982-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-09-25 | 1986-03-27 | 1986-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-09-25 | 1990-03-27 | 1990-09-26 | $7700.00 | Window Closed / Lapsed |