US3235631A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polarization process
Assignee: IND BIOLOGY LAB Inc
•
Filing: 1962-08-23
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Granted: 1966-02-15
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Expires: 1982-08-23
Abstract
No abstract record available.
Inventors
- 👤 Morris V Shelanski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:50
CPC Classifications
G; G02; G02B; G02B5/00; G02B5/30; G02B5/3025; G02B5/3033; B; B29; B29C; B29C59/00; B29C59/02; B29C59/022; B29K; B29K2029/00; B29K2029/04; B29K2995/00; B29K2995/0018; B29K2995/0034
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
A METHOD OF MAKING A VARIABLY POLARIZED FILM WHICH COMPRISES FORMING A FILM CONSISTING AT LEAST PARTIALLY OF POLYVINYL ALCOHOL, STAINING AT LEAST ONE SURFACE THEREOF WITH AN IODINE-CONTAINING STAIN, IMPOSING AREAS OF VARIABLE PLANES OF POLARITY ON SAID STAINED SURFACE BY APPLYING PREDETERMINED PATTERNS OF PRESSURE ON SAID SURFACE, SAID PATTERN COMPRISING AT LEAST TWO DIFFERENTY DIRECTED LINES OF PRESSURE, SAID LINES EXTENDING IN THEIR DIFFERENT DIRECTIONS IN THE COMMON PLANE OF SAID SURFACE, SAID PRESSURE BEING APPLIED IN DIRECTIONS AT LEAST PARTIALLY TRANSVERSE TO THE PLANE OF SAID STAINED SURFACE, AND THEN IMPOSING AN IMAGE ON SAID STRAINED SURFACE.
Claim 2
Independent Claim
101 words
A METHOD OF MAKING A VARIABLY POLARIZED FILM WHICH COMPRISES FORMING A FILM CONSISTING AT LEAST PARTIALLY OF POLYVINYL ALCOHOL, STAINING AT LEAST ONE SURFACE THEREOF WITH AN IODINE-CONTAINING STAIN, IMPOSING AREAS OF VARIABLE PLANES OF POLARITY ON SAID STAINED SURFACE BY APPLYING PREDETERMINED PATTERNS OF PRESSURE ON SAID SURFACE, SAID PATTERN COMPRISING AT LEAST TWO DIFFERENTY DIRECTED LINES OF PRESSURE, SAID LINES EXTENDING IN THEIR DIFFERENT DIRECTIONS IN THE COMMON PLANE OF SAID SURFACE, SAID PRESSURE BEING APPLIED IN DIRECTIONS AT LEAST PARTIALLY TRANSVERSE TO THE PLANE OF SAID STAINED SURFACE, AND THEN IMPOSING AN IMAGE ON SAID STRAINED SURFACE.
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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) | 1969-02-14 | 1969-08-16 | 1970-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-14 | 1973-08-16 | 1974-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-14 | 1977-08-16 | 1978-02-15 | $7700.00 | Window Closed / Lapsed |