US2400401A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Periscopic vision device
Assignee: Standard Products Co
•
Filing: 1943-04-22
•
Granted: 1946-05-14
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Expires: 1963-04-22
Abstract
No abstract record available.
Inventors
- 👤 Robert M Eckerman
- 👤 Charles E Fisher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:36
CPC Classifications
G; G02; G02B; G02B7/00; G02B7/18; G02B7/1805; F; F41; F41H; F41H5/00; F41H5/26; F41H5/266; G02B23/00; G02B23/02; G02B23/08; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49895; Y10T29/49902
Claims Analysis
Total Claims: 0
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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) | 1949-05-13 | 1949-11-12 | 1950-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1953-05-13 | 1953-11-12 | 1954-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1957-05-13 | 1957-11-12 | 1958-05-14 | $7700.00 | Window Closed / Lapsed |