US5141678A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for forming disposable molds for producing optical quality lenses
Assignee: Johnson and Johnson Vision Care Inc
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Filing: 1990-10-10
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Granted: 1992-08-25
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Expires: 2010-10-10
Abstract
Abstract A fast, simple and relatively inexpensive method for forming disposable molds for use in casting optical quality lenses. A method of producing a disposable mold having a casting surface is disclosed which comprises providing a base master having a first contacting surface; providing a casting surface master having a second contacting surface having a shape corresponding to the shape of the casting surface; providing a resin composition; contacting the base master and the casting surface master such that the first and second contacting surfaces form a cavity enclosing the resin composition, wherein the cavity is shaped to correspond to the shape of the disposable mold; and curing the resin composition to form the disposable mold.
Inventors
- 👤 Ronald D. Blum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:03
CPC Classifications
B; B29; B29D; B29D11/00; B29D11/00009; B29D11/0048; B29D11/00528; B29C; B29C33/00; B29C33/38; B29C33/3842; B29C33/3857; B29C33/40; B29D11/00413; B29L; B29L2011/00; B29L2011/0016; Y; Y10; Y10S; Y10S425/00; Y10S425/808
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
167 words
A method of producing a disposable mold for use in manufacturing optical quality spectacle lenses, said mold having a casting surface and an opposing surface, comprising: providing a resin composition; providing a base master having a first contacting surface made of a material which will bond to said resin composition upon curing; providing a casting surface master having a second contacting surface having a shape corresponding to the shape of said casting surface; contacting said base master and said casting surface master such that said first and second contacting surfaces form a cavity enclosing said resin composition, wherein said cavity is shaped to correspond to the shape of said disposable mold; and curing said resin composition to form said disposable mold; wherein said casting surface is of optical quality and said opposing surface is of less than optical quality and wherein said base master is incorporated into said mold; and coating said casting surface with a material that is transferable to a lens cast using said mold.
Claim 2
Independent Claim
167 words
A method of producing a disposable mold for use in manufacturing optical quality spectacle lenses, said mold having a casting surface and an opposing surface, comprising: providing a resin composition; providing a base master having a first contacting surface made of a material which will bond to said resin composition upon curing; providing a casting surface master having a second contacting surface having a shape corresponding to the shape of said casting surface; contacting said base master and said casting surface master such that said first and second contacting surfaces form a cavity enclosing said resin composition, wherein said cavity is shaped to correspond to the shape of said disposable mold; and curing said resin composition to form said disposable mold; wherein said casting surface is of optical quality and said opposing surface is of less than optical quality and wherein said base master is incorporated into said mold; and coating said casting surface with a material that is transferable to a lens cast using said mold.
Claim 3
Independent Claim
165 words
A method of producing a disposable mold for use in manufacturing optical quality spectacle lenses, said mold having a casting surface and an opposing surface, comprising: providing a resin composition; providing a base master having a first contacting surface made of a material which will bond to said resin composition upon curing; providing a casting surface master having a second contact surface having a shape corresponding to the shape of said casting surface; coating said casting surface master with a transferable material which is transferred to said casting surface of said mold; contacting said base master and said casting surface master such that said first and second contacting surfaces form a cavity enclosing said resin composition, wherein said cavity is shaped to correspond to the shape of said mold; and curing said resin composition to form said mold; wherein said casting surface is optical quality and said opposing surface is of less than optical quality and wherein said base master is incorporated into said mold.
Claim 4
Independent Claim
165 words
A method of producing a disposable mold for use in manufacturing optical quality spectacle lenses, said mold having a casting surface and an opposing surface, comprising: providing a resin composition; providing a base master having a first contacting surface made of a material which will bond to said resin composition upon curing; providing a casting surface master having a second contact surface having a shape corresponding to the shape of said casting surface; coating said casting surface master with a transferable material which is transferred to said casting surface of said mold; contacting said base master and said casting surface master such that said first and second contacting surfaces form a cavity enclosing said resin composition, wherein said cavity is shaped to correspond to the shape of said mold; and curing said resin composition to form said mold; wherein said casting surface is optical quality and said opposing surface is of less than optical quality and wherein said base master is incorporated into said mold.
Claim 5
Dependent Claim
31 words
The method of claim 2 wherein said transferable material is capable of further transfer from said casting surface of said mold to the surface of a lens cast with said mold.
Claim 6
Independent Claim
154 words
A method of producing a disposable mold for use in manufacturing optical quality spectacle lenses, said mold having a casting surface and an opposing surface, comprising; providing a resin composition; providing a base master having a first contacting surface made of a material which will bond to said resin composition upon curing; providing a casting surface master having a second contacting surface having a shape corresponding to the shape of said casting surface; contacting said base master and said casting surface master such that said first and second contacting surfaces form a cavity enclosing said resin composition, wherein said cavity is shaped to correspond to the shape of said mold; and curing said resin composition to form said mold; wherein said casting surface is of optical quality and said opposing surface is of less than optical quality and wherein said base master is incorporated into said mold; and casting said lens using said mold.
Claim 7
Independent Claim
154 words
A method of producing a disposable mold for use in manufacturing optical quality spectacle lenses, said mold having a casting surface and an opposing surface, comprising; providing a resin composition; providing a base master having a first contacting surface made of a material which will bond to said resin composition upon curing; providing a casting surface master having a second contacting surface having a shape corresponding to the shape of said casting surface; contacting said base master and said casting surface master such that said first and second contacting surfaces form a cavity enclosing said resin composition, wherein said cavity is shaped to correspond to the shape of said mold; and curing said resin composition to form said mold; wherein said casting surface is of optical quality and said opposing surface is of less than optical quality and wherein said base master is incorporated into said mold; and casting said lens using said mold.
Claim 8
Dependent Claim
22 words
The method of claim 4 wherein the casting surface of said mold is coated with a material which transfers to said lens.
Claim 9
Dependent Claim
27 words
The method of claim 4 wherein said mold is pre-edged to the desired shape of said lens prior to use of said mold to form said lens.
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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) | 1995-08-25 | 1996-02-24 | 1996-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-08-25 | 2000-02-24 | 2000-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-08-25 | 2004-02-24 | 2004-08-25 | $7700.00 | Window Closed / Lapsed |