US2423503A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite plastic sheet comprising a molecularly oriented polyvinyl alcohol layer and method of manufacture
Assignee: Polaroid Corp
•
Filing: 1942-05-22
•
Granted: 1947-07-08
•
Expires: 1962-05-22
Abstract
No abstract record available.
Inventors
- 👤 Edwin H Land
- 👤 Mahler Joseph
- 👤 William H Ryan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:47
CPC Classifications
G; G03; G03C; G03C9/00; G03C9/04; G02; G02B; G02B5/00; G02B5/30; G02B5/3025; G02B5/3033
Claims Analysis
Total Claims: 0
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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) | 1950-07-07 | 1951-01-06 | 1951-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-07-07 | 1955-01-06 | 1955-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-07-07 | 1959-01-06 | 1959-07-08 | $7700.00 | Window Closed / Lapsed |