Patent US2577599A successfully refreshed from Google Patents.
US2577599A
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US
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Shockproof case for borehole measuring instruments
Assignee: Sunoco Inc
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Filing: 1948-08-03
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Granted: 1951-12-04
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Expires: 1968-08-03
Abstract
No abstract record available.
Inventors
- 👤 Raoul J Bethancourt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:54
CPC Classifications
F; F16; F16F; F16F15/00; F16F15/02; F16F15/04; F16F15/08; E; E21; E21B; E21B47/00; E21B47/01; E21B47/017
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1985229A
Cited
US1860932A
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US2109690A
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US2425869A
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US2126741A
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US2219512A
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US2378738A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-12-03 | 1955-06-04 | 1955-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-03 | 1959-06-04 | 1959-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-03 | 1963-06-04 | 1963-12-04 | $7700.00 | Window Closed / Lapsed |