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Patent US3520595A successfully refreshed from Google Patents.
US3520595A
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US
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Optical beam angle generator
Assignee: Boeing North American Inc
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Filing: 1968-02-29
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Granted: 1970-07-14
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Expires: 1988-02-29
Abstract
No abstract record available.
Inventors
- 👤 Robert L Treuthart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:25
CPC Classifications
G; G02; G02B; G02B26/00; G02B26/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2565514A
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US3360324A
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US3295912A
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US3338656A
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US3376092A
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US3437400A
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US3315563A
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US3443098A
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US3450455A
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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) | 1973-07-13 | 1974-01-12 | 1974-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-13 | 1978-01-12 | 1978-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-13 | 1982-01-12 | 1982-07-14 | $7700.00 | Window Closed / Lapsed |