Patent US2592329A successfully refreshed from Google Patents.
US2592329A
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Optical apparatus for measuring by deflection
Assignee: Services Petroliers Schlumberger SA
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Filing: 1946-08-09
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Granted: 1952-04-08
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Expires: 1966-08-09
Abstract
No abstract record available.
Inventors
- 👤 Picard Maxime Felix Benoit
- 👤 Schlumberger Marcel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:07
CPC Classifications
G; G01; G01D; G01D7/00; G01D7/02; G01D7/04; G01D7/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1982333A
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US1098905A
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US1520245A
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US1871380A
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US2019871A
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US1960169A
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US2295802A
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US2384540A
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US2428369A
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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) | 1955-04-08 | 1955-10-08 | 1956-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-08 | 1959-10-08 | 1960-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-08 | 1963-10-08 | 1964-04-08 | $7700.00 | Window Closed / Lapsed |