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Patent US2858978A successfully refreshed from Google Patents.
US2858978A
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Reservoir analyzer
Assignee: Sunoco Inc
•
Filing: 1952-09-09
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Granted: 1958-11-04
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Expires: 1972-09-09
Abstract
No abstract record available.
Inventors
- 👤 Edward W Yetter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:33
CPC Classifications
G; G06; G06G; G06G7/00; G06G7/12; G06G7/32; G06G7/38; G06G7/40; G06G7/42; Y; Y10; Y10T; Y10T409/00; Y10T409/30; Y10T409/30084; Y10T409/300896
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2713651A
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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) | 1961-11-03 | 1962-05-05 | 1962-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-03 | 1966-05-05 | 1966-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-03 | 1970-05-05 | 1970-11-04 | $7700.00 | Window Closed / Lapsed |