US2213307A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for deflecting light
Assignee: Individual
•
Filing: 1937-06-26
•
Granted: 1940-09-03
•
Expires: 1957-06-26
Abstract
No abstract record available.
Inventors
- 👤 Douglas A Elliott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:08
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/29; G02B; G02B5/00; G02B5/12; G02B5/126; G02F1/01; G02F1/07; G11; G11B; G11B7/00; G11B7/002; G11B7/003; G11B7/0032
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1943-09-03 | 1944-03-04 | 1944-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-09-03 | 1948-03-04 | 1948-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-09-03 | 1952-03-04 | 1952-09-03 | $7700.00 | Window Closed / Lapsed |