US2610546A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Condenser lens arrangement for projectors
Assignee: Individual
•
Filing: 1950-04-28
•
Granted: 1952-09-16
•
Expires: 1970-04-28
Abstract
No abstract record available.
Inventors
- 👤 Rubin Harry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 19:26
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/14; G03B21/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1617596A
Cited
US934579A
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US1615674A
Cited
US1621741A
Cited
US2140979A
Cited
US2180031A
Cited
US2262534A
Cited
US2284567A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-09-16 | 1956-03-17 | 1956-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-09-16 | 1960-03-17 | 1960-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-09-16 | 1964-03-17 | 1964-09-16 | $7700.00 | Window Closed / Lapsed |