US2599386A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Well treatment apparatus
Assignee: Dow Chemical Co
•
Filing: 1946-07-15
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Granted: 1952-06-03
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Expires: 1966-07-15
Abstract
No abstract record available.
Inventors
- 👤 James D Haynes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:55
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/10; E21B33/13; E21B33/14; E21B33/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1791874A
Cited
US1882099A
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US2004606A
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US2087297A
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US2191750A
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US2310483A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-06-03 | 1955-12-03 | 1956-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-06-03 | 1959-12-03 | 1960-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-06-03 | 1963-12-03 | 1964-06-03 | $7700.00 | Window Closed / Lapsed |