Patent US3446560A successfully refreshed from Google Patents.
US3446560A
Expired / Lapsed
US
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Three directional optical alignment instrument
Assignee: Boeing Co
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Filing: 1965-03-08
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Granted: 1969-05-27
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Expires: 1985-03-08
Abstract
No abstract record available.
Inventors
- 👤 Robert E Brasier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:51
CPC Classifications
G; G02; G02B; G02B17/00; G02B17/02; G02B17/04; G02B23/00; G02B23/02; G02B23/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1012715A
Cited
US1616279A
Cited
US1971061A
Cited
US2505819A
Cited
US2909097A
Cited
US3107168A
Cited
US3229562A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-05-26 | 1972-11-25 | 1973-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-26 | 1976-11-25 | 1977-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-26 | 1980-11-25 | 1981-05-27 | $7700.00 | Window Closed / Lapsed |