Patent US3471936A successfully refreshed from Google Patents.
US3471936A
Expired / Lapsed
US
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Apparatus for measuring the spherical coordinates of a luminous point
Assignee: Sagem SA
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Filing: 1967-07-03
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Granted: 1969-10-14
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Expires: 1987-07-03
Abstract
No abstract record available.
Inventors
- 👤 Rene Jean-Baptiste Claret
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:41
CPC Classifications
G; G01; G01C; G01C9/00; G01C9/12; G01C9/14; E; E21; E21B; E21B47/00; E21B47/02; G01B; G01B11/00; G01B11/02; G01B11/03; G01B11/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1732397A
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US1919332A
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US2208147A
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US2365999A
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US2438293A
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US2413399A
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US2621808A
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US2693991A
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US2685082A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-13 | 1973-04-14 | 1973-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-13 | 1977-04-14 | 1977-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-13 | 1981-04-14 | 1981-10-14 | $7700.00 | Window Closed / Lapsed |