US2609878A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple zone testing
Assignee: Halliburton Oil Well Cementing Co
•
Filing: 1946-04-27
•
Granted: 1952-09-09
•
Expires: 1966-04-27
Abstract
No abstract record available.
Inventors
- 👤 Erle P Halliburton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:39
CPC Classifications
E; E21; E21B; E21B49/00; E21B49/08; E21B49/081
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1547240A
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US1930987A
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US2133730A
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US2107006A
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US2111982A
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US2313176A
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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) | 1955-09-09 | 1956-03-10 | 1956-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-09-09 | 1960-03-10 | 1960-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-09-09 | 1964-03-10 | 1964-09-09 | $7700.00 | Window Closed / Lapsed |