US3208902A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Novel polarizing products and processes for their preparation
Assignee: Polaroid Corp
•
Filing: 1961-05-05
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Granted: 1965-09-28
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Expires: 1981-05-05
Abstract
No abstract record available.
Inventors
- 👤 Lester H Arond
- 👤 James L Bailey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:26
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/12; C08J5/124; B; B29; B29D; B29D11/00; B29D11/00634; B29D11/0073; B29D11/0074; B32; B32B; B32B27/00; C09; C09J; C09J163/00; G; G02; G02B; G02B1/00; G02B5/00; G02B5/30; G02B5/3025; G02B5/3033; G02B5/3083; B29K; B29K2995/00; B29K2995/0018; B29K2995/0031; B29K2995/0032; C08J2329/00; C08J2329/02; C08J2329/04; Y; Y10; Y10T; Y10T428/00; Y10T428/26; Y10T428/263; Y10T428/264; Y10T428/265; Y10T428/31504; Y10T428/31511; Y10T428/31515; Y10T428/31518; Y10T428/31525; Y10T428/31725
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
37 words
A LAMINATION COMPRISING A PLURALITY OF TRANSPARENT ELEMENTS, HAVING SANDWICHED THEREBETWEEN AND BONDED THERETO A SHEET-LIKE OPTICAL ELEMENT COMPRISING POLYVINYL ALCOHOL, SAID TRANSPARENT ELEMENTS AND SAID POLYVINYL ALCOHOL OPTICAL ELEMENT BEING BONDED BY A CROSS-LINKED EPOXY POLYMER.
Claim 2
Dependent Claim
37 words
A LAMINATION COMPRISING A PLURALITY OF TRANSPARENT ELEMENTS, HAVING SANDWICHED THEREBETWEEN AND BONDED THERETO A SHEET-LIKE OPTICAL ELEMENT COMPRISING POLYVINYL ALCOHOL, SAID TRANSPARENT ELEMENTS AND SAID POLYVINYL ALCOHOL OPTICAL ELEMENT BEING BONDED BY A CROSS-LINKED EPOXY POLYMER.
References Cited (Backward Citations)
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US2270323A
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US2420270A
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US2553961A
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US2872427A
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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) | 1968-09-27 | 1969-03-29 | 1969-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-27 | 1973-03-29 | 1973-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-27 | 1977-03-29 | 1977-09-28 | $7700.00 | Window Closed / Lapsed |