Patent US2479792A successfully refreshed from Google Patents.
US2479792A
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Optical system for variable power telescopes
Assignee: Bausch and Lomb Inc
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Filing: 1948-05-15
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Granted: 1949-08-23
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Expires: 1968-05-15
Abstract
No abstract record available.
Inventors
- 👤 Robert B Tackaberry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:04
CPC Classifications
G; G02; G02B; G02B23/00; G02B23/14; G02B23/145; G02B15/00; G02B15/02; G02B15/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-08-22 | 1953-02-21 | 1953-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-08-22 | 1957-02-21 | 1957-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-08-22 | 1961-02-21 | 1961-08-23 | $7700.00 | Window Closed / Lapsed |