US2977845A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Display systems, devices, and products employing polarized light
Assignee: Individual
•
Filing: 1955-10-14
•
Granted: 1961-04-04
•
Expires: 1975-10-14
Abstract
No abstract record available.
Inventors
- 👤 Boone Philip
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:25
CPC Classifications
G; G09; G09F; G09F19/00; G09F19/12; G09F19/20; G09F19/205; G02; G02B; G02B27/00; G02B27/02; G02B27/06
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) | 1964-04-03 | 1964-10-03 | 1965-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-03 | 1968-10-03 | 1969-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-03 | 1972-10-03 | 1973-04-04 | $7700.00 | Window Closed / Lapsed |