Patent US2930304A successfully refreshed from Google Patents.
US2930304A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Camera back assembly
Assignee: Individual
•
Filing: 1958-07-18
•
Granted: 1960-03-29
•
Expires: 1978-07-18
Abstract
No abstract record available.
Inventors
- 👤 Zelar Louis P De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 16:27
CPC Classifications
G; G03; G03B; G03B17/00; G03B17/44
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1996481A
Cited
US2397742A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-29 | 1963-09-28 | 1964-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-29 | 1967-09-28 | 1968-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-29 | 1971-09-28 | 1972-03-29 | $7700.00 | Window Closed / Lapsed |