US3030863A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Zoom type of variable magnification optical system for attachment to photographic objectives
Assignee: Bausch and Lomb Inc
•
Filing: 1959-12-28
•
Granted: 1962-04-24
•
Expires: 1979-12-28
Abstract
No abstract record available.
Inventors
- 👤 John M Schwartz
- 👤 George F Ziegler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:04
CPC Classifications
G; G02; G02B; G02B15/00; G02B15/14; G02B15/143; G02B15/1431; G02B15/143103
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2165341A
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US2279372A
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US2645154A
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US2764062A
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US2898808A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-04-23 | 1965-10-23 | 1966-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-23 | 1969-10-23 | 1970-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-23 | 1973-10-23 | 1974-04-24 | $7700.00 | Window Closed / Lapsed |