Patent US1318646A successfully refreshed from Google Patents.
Patent US2673487A successfully refreshed from Google Patents.
US2673487A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copying camera
Assignee: National Geographic Society
•
Filing: 1948-12-31
•
Granted: 1954-03-30
•
Expires: 1968-12-31
Abstract
No abstract record available.
Inventors
- 👤 Bumstead George Newman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:41
CPC Classifications
G; G03; G03B; G03B27/00; G03B27/32; G03B27/34; G03B27/36
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1107520A
Cited
US1821923A
Cited
US2003691A
Cited
GB363896A
Cited
DE610146C
Cited
US2099681A
Cited
US2158039A
Cited
US2327086A
Cited
US2293425A
Cited
US2364362A
Cited
US2415424A
Cited
US2418230A
Cited
US2397668A
Cited
US2469076A
Cited
US2462340A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-29 | 1957-09-28 | 1958-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-29 | 1961-09-28 | 1962-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-29 | 1965-09-28 | 1966-03-30 | $7700.00 | Window Closed / Lapsed |