US2432113A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of impregnating a polyvinyl polarizing sheet with tetraethyl ortho silicate
Assignee: Individual
•
Filing: 1942-04-21
•
Granted: 1947-12-09
•
Expires: 1962-04-21
Abstract
No abstract record available.
Inventors
- 👤 Marks Alvin
- 👤 Weiss Gerhart
- 👤 Island Long
- 👤 Miller Alvin Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:56
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/12; G; 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) | 1950-12-08 | 1951-06-09 | 1951-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-12-08 | 1955-06-09 | 1955-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-12-08 | 1959-06-09 | 1959-12-09 | $7700.00 | Window Closed / Lapsed |