US2620706A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Eyepiece for telescopes
Assignee: Bausch and Lomb Inc
•
Filing: 1948-09-23
•
Granted: 1952-12-09
•
Expires: 1968-09-23
Abstract
No abstract record available.
Inventors
- 👤 Aaron A Levin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:51
CPC Classifications
G; G02; G02B; G02B25/00; G02B25/001
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB189507755A
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US936541A
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US1097635A
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US1116069A
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US1143667A
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US1236722A
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US1468762A
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US1464655A
Cited
US1549579A
Cited
GB442806A
Cited
US2237943A
Cited
US2430549A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-12-09 | 1956-06-09 | 1956-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-09 | 1960-06-09 | 1960-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-09 | 1964-06-09 | 1964-12-09 | $7700.00 | Window Closed / Lapsed |