US4798690A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Molding a glass-plastic composite lens
Assignee: Electric Power Research Institute
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Filing: 1986-11-03
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Granted: 1989-01-17
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Expires: 2006-11-03
Abstract
Abstract A method is provided for producing a molded composite form comprising a substrate bonded to a thermoplastic element whereby the thermoplastic element, either separate from or together with the substrate, is heated to a first temperature sufficient to soften prior to placement in a mold with the substrate. The thermoplastic element and substrate are then comolded in a cool mold whereby the composite is cooled and shaped into a predetermined configuration in one operation.
Inventors
- 👤 Sheldon L. Levy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:47
CPC Classifications
B; B32; B32B; B32B17/00; B32B17/06; B32B17/10; B32B17/10005; B32B17/10807; B32B17/10889; B29; B29D; B29D11/00; B29D11/00009; C; C03; C03C; C03C17/00; C03C17/28; C03C17/32; B29L; B29L2011/00; B29L2011/0016; B32B2309/00; B32B2309/02; B32B2551/00
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
104 words
A method for producing a molded optical lens comprising an optical glass substrate bonded to a thermoplastic element, comprising the steps of: providing a heated composite of said substrate in contact with said thermoplastic element at a temperature sufficient to soften said thermoplastic element for a molding operation; juxtaposing said heated composite in a mold cavity characterized by a predetermined surface configuration, said cavity being at a temperature in the range of about 40°-50° C., whereby said composite is cooled and molded into said configuration to form said optical lens whereby said mold remains essentially isothermal; removing said molded optical lens from said cavity.
Claim 2
Independent Claim
104 words
A method for producing a molded optical lens comprising an optical glass substrate bonded to a thermoplastic element, comprising the steps of: providing a heated composite of said substrate in contact with said thermoplastic element at a temperature sufficient to soften said thermoplastic element for a molding operation; juxtaposing said heated composite in a mold cavity characterized by a predetermined surface configuration, said cavity being at a temperature in the range of about 40°-50° C., whereby said composite is cooled and molded into said configuration to form said optical lens whereby said mold remains essentially isothermal; removing said molded optical lens from said cavity.
Claim 3
Dependent Claim
23 words
The method according to claim 1 wherein said step of providing said heated lens comprises heating said lens external to said mold cavity.
Claim 4
Dependent Claim
32 words
The method according to claim 1 wherein said step of providing said heated lens comprises the steps of separately heating said substrate and then contacting said heated substrate with said thermoplastic element.
Claim 5
Dependent Claim
17 words
The method according to claim 1 wherein said first temperature is in the range of 70°-180° C.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-01-17 | 1992-07-18 | 1993-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-01-17 | 1996-07-18 | 1997-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-01-17 | 2000-07-18 | 2001-01-17 | $7700.00 | Window Closed / Lapsed |