US2544659A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dichroic light-polarizing sheet materials and the like and the formation and use thereof
Assignee: Individual
•
Filing: 1946-05-14
•
Granted: 1951-03-13
•
Expires: 1966-05-14
Abstract
No abstract record available.
Inventors
- 👤 John F Dreyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 02:22
CPC Classifications
G; G02; G02B; G02B5/00; G02B5/30; G02B5/3025; G02B5/3033; G02B5/3016; Y; Y10; Y10S; Y10S428/00; Y10S428/913
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US194754A
Cited
US1341637A
Cited
US1873951A
Cited
US2062179A
Cited
US2236972A
Cited
US2199227A
Cited
US2454515A
Cited
US2237567A
Cited
US2400877A
Cited
US2346766A
Cited
US2418605A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-03-12 | 1954-09-11 | 1955-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-03-12 | 1958-09-11 | 1959-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-03-12 | 1962-09-11 | 1963-03-13 | $7700.00 | Window Closed / Lapsed |