US3066569A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Line-of-sight illumination and viewing instrument
Assignee: Individual
•
Filing: 1958-12-15
•
Granted: 1962-12-04
•
Expires: 1978-12-15
Abstract
No abstract record available.
Inventors
- 👤 Francis B Macdonald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:59
CPC Classifications
A; A61; A61B; A61B3/00; A61B3/10; A61B3/13; A61B3/135; G; G02; G02B; G02B23/00; G02B23/02; G02B23/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1631329A
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US1889456A
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US1896861A
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US2014888A
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US2661658A
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US2633122A
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US2703506A
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US2798961A
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US2848626A
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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) | 1965-12-03 | 1966-06-04 | 1966-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-03 | 1970-06-04 | 1970-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-03 | 1974-06-04 | 1974-12-04 | $7700.00 | Window Closed / Lapsed |