US4416946A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High stability polarizer
Assignee: Optical Devices Inc
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Filing: 1982-04-05
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Granted: 1983-11-22
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Expires: 2002-04-05
Abstract
Abstract The invention relates to a highly hydrolytically stable polarizer element having a moisture barrier flurocarbon film as its supporting substrate.
Inventors
- 👤 Lawrence Bolt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:34
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; B32B27/08; B32B27/30; B32B27/306; G; G02; G02B; G02B5/00; G02B5/30; G02B5/3025; G02B5/3033; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/3154; Y10T428/31544; Y10T428/31855; Y10T428/31909; Y10T428/31913
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
56 words
A polarizing element which comprises a sheet of a stained polyvinyl alcohol film which is adhered on one side thereof to a flexible transparent fluorine containing sheet, said fluorine containing sheet consisting essentially of a material selected from the group consisting of ethylene-chlorotrifluoroethylene, polytetrafluoroethylene, polyvinylidene fluoride, ethylene tetrafluoroethylene, perfluoro alkoxy materials, fluorinated ethylene propylene, and polychlorotrifluoroethylene.
Claim 2
Dependent Claim
56 words
A polarizing element which comprises a sheet of a stained polyvinyl alcohol film which is adhered on one side thereof to a flexible transparent fluorine containing sheet, said fluorine containing sheet consisting essentially of a material selected from the group consisting of ethylene-chlorotrifluoroethylene, polytetrafluoroethylene, polyvinylidene fluoride, ethylene tetrafluoroethylene, perfluoro alkoxy materials, fluorinated ethylene propylene, and polychlorotrifluoroethylene.
Claim 3
Dependent Claim
29 words
The element of claim 1 further comprising a film of an additional flexible, transparent sheet material adherently disposed between said stained polyvinyl alcohol film and said fluorine containing sheet.
Claim 4
Dependent Claim
16 words
The element of claim 2 wherein said additional sheet material comprises polyester or cellulose acetate butyrate.
Claim 5
Dependent Claim
13 words
The element of claim 1 or 2 wherein said fluorine containing comprises polychlorotrifluoroethylene.
Claim 6
Dependent Claim
26 words
The element of claim 1 or 2 further comprising an additional flexible transparent fluorine containing sheet adhered to the opposite side of said polyvinyl alcohol film.
Claim 7
Dependent Claim
29 words
The element of claim 5 further comprising a second flexible transparent sheet material adherently disposed between said stained polyvinyl alcohol film and said additional flexible transparent fluorine containing sheet.
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) | 1986-11-21 | 1987-05-23 | 1987-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-11-21 | 1991-05-23 | 1991-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-11-21 | 1995-05-23 | 1995-11-22 | $7700.00 | Window Closed / Lapsed |