US2740328A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Focusing lens mounting for cylindrical lenses
Assignee: Bausch and Lomb Inc
•
Filing: 1953-07-24
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Granted: 1956-04-03
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Expires: 1973-07-24
Abstract
No abstract record available.
Inventors
- 👤 Olin W Boughton
- 👤 Edwin J Brinkman
- 👤 Jr Charles J De Grave
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:49
CPC Classifications
G; G02; G02B; G02B7/00; G02B7/02; G02B7/023
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1962892A
Cited
US1848402A
Cited
US2005068A
Cited
US2008991A
Cited
US2180027A
Cited
US2254537A
Cited
US2456053A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-04-03 | 1959-10-03 | 1960-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-04-03 | 1963-10-03 | 1964-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-04-03 | 1967-10-03 | 1968-04-03 | $7700.00 | Window Closed / Lapsed |