Patent US3658616A successfully refreshed from Google Patents.
US3658616A
Expired / Lapsed
US
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Method of making light polarizing patterns
Assignee: Polacoat Inc
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Filing: 1969-09-17
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Granted: 1972-04-25
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Expires: 1989-09-17
Abstract
Abstract Methods for making patterns comprising areas different with respect to their light polarizing properties by selective removal of portions of a continuous polarizing film, such as of a dichroic dye, from a carrier therefor to define all or a portion of said areas. Selective removal may be by destructive removal of the dye film from the carrier, or by transfer of portions thereof to a receptor surface.
Inventors
- 👤 John F Dreyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:43
CPC Classifications
B; B44; B44C; B44C1/00; B44C1/16; B44C1/165; B44C1/17; B44C1/1733; B42; B42D; B42D25/00; B42D25/20; B42D25/29; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
16 words
A method as in claim 1 wherein the desired polarizing pattern is retained on said carrier.
Claim 2
Dependent Claim
17 words
A method as in claim 1 wherein the desired polarizing pattern is formed on said receptor surface.
References Cited (Backward Citations)
US2256108A
Cited
US2919179A
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US3218926A
Cited
US3002848A
Cited
US3122463A
Cited
US3174888A
Cited
US3290191A
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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) | 1975-04-25 | 1975-10-25 | 1976-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-25 | 1979-10-25 | 1980-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-25 | 1983-10-25 | 1984-04-25 | $7700.00 | Window Closed / Lapsed |