Patent US2982178A successfully refreshed from Google Patents.
US2982178A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-layer light polarizing structure
Assignee: Marks Polarized Corp
•
Filing: 1956-06-15
•
Granted: 1961-05-02
•
Expires: 1976-06-15
Abstract
No abstract record available.
Inventors
- 👤 Alvin M Marks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:35
CPC Classifications
G; G02; G02B; G02B5/00; G02B5/30; G02B5/3025; G02B5/3066; G02B5/3033; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2402176A
Cited
US2017705A
Cited
US2252898A
Cited
US2492809A
Cited
US2403731A
Cited
US2453379A
Cited
US2693668A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-01 | 1964-10-31 | 1965-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-01 | 1968-10-31 | 1969-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-01 | 1972-10-31 | 1973-05-02 | $7700.00 | Window Closed / Lapsed |