Patent US2670655A successfully refreshed from Google Patents.
US2670655A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aerial photograph viewing stereoscope
Assignee: Individual
•
Filing: 1951-03-06
•
Granted: 1954-03-02
•
Expires: 1971-03-06
Abstract
No abstract record available.
Inventors
- 👤 Buckmaster James Lloyd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:06
CPC Classifications
G; G02; G02B; G02B30/00; G02B30/20; G02B30/34; G02B30/35
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1232606A
Cited
US1494728A
Cited
US1756062A
Cited
US1956822A
Cited
CH161607A
Cited
US2104552A
Cited
US2229309A
Cited
US2229424A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-01 | 1957-08-31 | 1958-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-01 | 1961-08-31 | 1962-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-01 | 1965-08-31 | 1966-03-02 | $7700.00 | Window Closed / Lapsed |