US3057259A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable magnification optical systems
Assignee: Bausch and Lomb Inc
•
Filing: 1961-06-22
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Granted: 1962-10-09
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Expires: 1981-06-22
Abstract
No abstract record available.
Inventors
- 👤 Richard F Schuma
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:28
CPC Classifications
G; G02; G02B; G02B21/00; G02B21/02; G02B21/025; G02B15/00; G02B15/14; G02B15/143; G02B15/1431; G02B15/143105; G02B21/18; G02B21/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-10-08 | 1966-04-09 | 1966-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-10-08 | 1970-04-09 | 1970-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-10-08 | 1974-04-09 | 1974-10-09 | $7700.00 | Window Closed / Lapsed |