US1675431A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light transmitting and reflecting device
Assignee: SPENCER LENS CO
•
Filing: 1925-04-18
•
Granted: 1928-07-03
•
Expires: 1945-04-18
Abstract
No abstract record available.
Inventors
- 👤 Donald E Sharp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:32
CPC Classifications
G; G02; G02B; G02B5/00; G02B5/12; G02B5/126; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49863; Y10T29/49876
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) | 1931-07-03 | 1932-01-02 | 1932-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1935-07-03 | 1936-01-02 | 1936-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1939-07-03 | 1940-01-02 | 1940-07-03 | $7700.00 | Window Closed / Lapsed |