US3058393A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light-polarizing film material and the process of preparation
Assignee: Polaroid Corp
•
Filing: 1958-03-27
•
Granted: 1962-10-16
•
Expires: 1978-03-27
Abstract
No abstract record available.
Inventors
- 👤 William H Ryan
- 👤 Leonard C Farney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:23
CPC Classifications
G; G02; G02B; G02B5/00; G02B5/30; G02B5/3025; G02B5/3033; B; B29; B29D; B29D11/00; B29D11/0073; B29D11/0074; B29D11/00865; G03; G03C; G03C9/00; G03C9/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
37 words
A COMPOSITE LIGHT-POLARIZING SHEET MATERIAL OF HIGH EFFICIENCY COMPRISING, IN ASSEMBLED RELATION, A FIRST FILM COMPOSED OF A TRANSPARENT CELLULOSIC MATERIAL CONSTITUTING A DIMENSIONALLY STABLE BASE, A SECOND EXTREMELY THIN AND INTRINSICALLY FRAGILE LIGHT-POLARIZING FILM OF SUBSTANTIALLY
Claim 2
Dependent Claim
37 words
A COMPOSITE LIGHT-POLARIZING SHEET MATERIAL OF HIGH EFFICIENCY COMPRISING, IN ASSEMBLED RELATION, A FIRST FILM COMPOSED OF A TRANSPARENT CELLULOSIC MATERIAL CONSTITUTING A DIMENSIONALLY STABLE BASE, A SECOND EXTREMELY THIN AND INTRINSICALLY FRAGILE LIGHT-POLARIZING FILM OF SUBSTANTIALLY
References Cited (Backward Citations)
US2011553A
Cited
US2239718A
Cited
US2286569A
Cited
US2328219A
Cited
US2398435A
Cited
US2402166A
Cited
US2416510A
Cited
US2445579A
Cited
US2445555A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-10-15 | 1966-04-16 | 1966-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-10-15 | 1970-04-16 | 1970-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-10-15 | 1974-04-16 | 1974-10-16 | $7700.00 | Window Closed / Lapsed |