Patent US2711084A successfully refreshed from Google Patents.
US2711084A
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Refrigeration system for well logging instruments
Assignee: Well Surveys Inc
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Filing: 1952-08-30
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Granted: 1955-06-21
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Expires: 1972-08-30
Abstract
No abstract record available.
Inventors
- 👤 Bergan Reuben Allard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:12
CPC Classifications
G; G01; G01V; G01V5/00; G01V5/04; E; E21; E21B; E21B36/00; E21B36/003; E21B47/00; E21B47/01; E21B47/017; E21B47/0175
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1380987A
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US1876915A
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US1870696A
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US2016377A
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US2324103A
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US2433554A
Cited
US2671323A
Cited
US2686268A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-06-20 | 1958-12-20 | 1959-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-06-20 | 1962-12-20 | 1963-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-06-20 | 1966-12-20 | 1967-06-21 | $7700.00 | Window Closed / Lapsed |