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Patent US2506484A successfully refreshed from Google Patents.
US2506484A
Expired / Lapsed
US
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Camera with darkroom loaded roll film
Assignee: Individual
•
Filing: 1947-08-07
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Granted: 1950-05-02
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Expires: 1967-08-07
Abstract
No abstract record available.
Inventors
- 👤 Bierhorst Frederick Eugene
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:42
CPC Classifications
G; G03; G03B; G03B19/00; G03B19/02; G03B19/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US471585A
Cited
US471584A
Cited
US729325A
Cited
US1245760A
Cited
GB265218A
Cited
US1857524A
Cited
FR782157A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-05-01 | 1953-10-31 | 1954-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-05-01 | 1957-10-31 | 1958-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-05-01 | 1961-10-31 | 1962-05-02 | $7700.00 | Window Closed / Lapsed |