Patent US4025688A successfully refreshed from Google Patents.
US4025688A
Expired / Lapsed
US
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Polarizer lamination
Assignee: Polaroid Corp
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Filing: 1975-11-24
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Granted: 1977-05-24
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Expires: 1995-11-24
Abstract
Abstract A novel reflective light-polarizing lamination comprising a light polarizer laminated to the matte surface of aluminum foil and useful in display cells for field-effect transition liquid crystal displays.
Inventors
- 👤 Alexander W. Nagy
- 👤 Giorgio B. Trapani
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:46
CPC Classifications
B; B32; B32B; B32B15/00; B32B15/04; B32B15/08; B32B15/20; B32B7/00; B32B7/04; B32B7/12; G; G02; G02B; G02B5/00; G02B5/30; G02B5/3025; G02B5/3033; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1335; G02F1/133528; B32B2307/00; B32B2307/40; B32B2307/416; B32B2307/42; B32B2457/00; B32B2457/20; B32B2457/202; Y; Y10; Y10T; Y10T428/00; Y10T428/28; Y10T428/2813; Y10T428/283; Y10T428/31504; Y10T428/31678; Y10T428/31692; Y10T428/31696
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
46 words
A light-polarizing light reflective lamination comprising a layer of aluminum foil having at least one matte surface and a light-polarizing film having first and second surfaces, said first surface being adhesively bonded with a transparent thermoplastic synthetic resin to said matte surface of said aluminum foil.
Claim 2
Dependent Claim
46 words
A light-polarizing light reflective lamination comprising a layer of aluminum foil having at least one matte surface and a light-polarizing film having first and second surfaces, said first surface being adhesively bonded with a transparent thermoplastic synthetic resin to said matte surface of said aluminum foil.
Claim 3
Dependent Claim
34 words
The lamination of claim 1 wherein said light-polarizing film comprises a stretched synthetic plastic material and said matte surface of said foil comprises grooves generally aligned with the stretch axis of said light-polarizing film.
Claim 4
Dependent Claim
11 words
The lamination of claim 1 wherein said aluminum foil is anodized.
Claim 5
Dependent Claim
46 words
The lamination of claim 1 which further comprises a support layer for said light-polarizing film, said support layer having first and second surfaces, said first surface of said support layer being adhesively bonded to said second surface of said light-polarizing film with a hydrophilic tie coat.
Claim 6
Dependent Claim
32 words
The lamination of claim 4 which includes a layer of adhesive on the second surface of said support layer whereby said lamination may be adhered to a field-effect transition liquid crystal device.
Claim 7
Dependent Claim
15 words
The lamination of claim 5 wherein said layer of adhesive is a water remoistenable adhesive.
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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) | 1980-05-23 | 1980-11-22 | 1981-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-23 | 1984-11-22 | 1985-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-23 | 1988-11-22 | 1989-05-24 | $7700.00 | Window Closed / Lapsed |