US2773418A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic copying and viewing apparatus
Assignee: Bell and Howell Co
•
Filing: 1955-01-26
•
Granted: 1956-12-11
•
Expires: 1975-01-26
Abstract
No abstract record available.
Inventors
- 👤 Thomas R Perzentka
- 👤 Stuart C Plettner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:03
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/10; G03B21/11; G03B27/00; G03B27/32; G03B27/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2180007A
Cited
US2564440A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-12-11 | 1960-06-11 | 1960-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-11 | 1964-06-11 | 1964-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-11 | 1968-06-11 | 1968-12-11 | $7700.00 | Window Closed / Lapsed |