US3023667A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Integral beam lamp and projection system
Assignee: Bell and Howell Co
•
Filing: 1958-03-21
•
Granted: 1962-03-06
•
Expires: 1978-03-21
Abstract
No abstract record available.
Inventors
- 👤 Lessman Gerhard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:16
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/14; G03B21/20; G03B21/32; H; H01; H01K; H01K1/00; H01K1/62; H01K7/00; H01K7/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1596481A
Cited
US1646442A
Cited
US1651431A
Cited
CH170943A
Cited
US2196738A
Cited
US2481694A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-03-05 | 1965-09-04 | 1966-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-03-05 | 1969-09-04 | 1970-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-03-05 | 1973-09-04 | 1974-03-06 | $7700.00 | Window Closed / Lapsed |