US2876674A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Opaque picture viewer with angled lens
Assignee: Individual
•
Filing: 1957-02-18
•
Granted: 1959-03-10
•
Expires: 1977-02-18
Abstract
No abstract record available.
Inventors
- 👤 Gerhard J Ohlhaver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:33
CPC Classifications
G; G02; G02B; G02B27/00; G02B27/02; G02B27/022; G02B27/024; G02B27/025
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR343319A
Cited
US2345416A
Cited
US2419339A
Cited
US2654173A
Cited
FR1076707A
Cited
FR1098179A
Cited
US2785485A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-09 | 1962-09-08 | 1963-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-09 | 1966-09-08 | 1967-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-09 | 1970-09-08 | 1971-03-10 | $7700.00 | Window Closed / Lapsed |