US3041933A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Slide projector
Assignee: Bausch and Lomb Inc
•
Filing: 1959-11-18
•
Granted: 1962-07-03
•
Expires: 1979-11-18
Abstract
No abstract record available.
Inventors
- 👤 Henry J Emmel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:36
CPC Classifications
G; G03; G03B; G03B23/00; G03B23/14
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2057553A
Cited
US2235876A
Cited
US2315914A
Cited
US2443171A
Cited
US2506765A
Cited
US2691320A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-07-02 | 1966-01-01 | 1966-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-07-02 | 1970-01-01 | 1970-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-07-02 | 1974-01-01 | 1974-07-03 | $7700.00 | Window Closed / Lapsed |