US3364995A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic fracturing fluid-bearing earth formations
Assignee: Dow Chemical Co
•
Filing: 1966-02-14
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Granted: 1968-01-23
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Expires: 1986-02-14
Abstract
No abstract record available.
Inventors
- 👤 Bobby L Atkins
- 👤 Jr Edwin N Alderman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:56
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/25; E21B43/26; E21B43/267
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3173484A
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US3164208A
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US3259190A
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US3217801A
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US3195635A
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US3316965A
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US3237693A
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US3266573A
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US3302719A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-01-22 | 1971-07-24 | 1972-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-01-22 | 1975-07-24 | 1976-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-01-22 | 1979-07-24 | 1980-01-23 | $7700.00 | Window Closed / Lapsed |