US2875346A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Overall optical viewer
Assignee: Individual
•
Filing: 1946-04-25
•
Granted: 1959-02-24
•
Expires: 1966-04-25
Abstract
No abstract record available.
Inventors
- 👤 George S Monk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:20
CPC Classifications
G; G21; G21F; G21F7/00; G21F7/02; G21C; G21C17/00; G21C17/08; G21C19/00; G21C19/14; Y; Y02; Y02E; Y02E30/00; Y02E30/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1419241A
Cited
US1657776A
Cited
GB190000395A
Cited
US1565590A
Cited
US1866306A
Cited
US2200466A
Cited
US2041290A
Cited
US2146662A
Cited
US2169874A
Cited
US2406148A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-02-23 | 1962-08-25 | 1963-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-23 | 1966-08-25 | 1967-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-23 | 1970-08-25 | 1971-02-24 | $7700.00 | Window Closed / Lapsed |