US2927638A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multistage hydrafracturing process and apparatus
Assignee: Individual
•
Filing: 1955-01-10
•
Granted: 1960-03-08
•
Expires: 1975-01-10
Abstract
No abstract record available.
Inventors
- 👤 Sr Jesse E Hall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:57
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/10; E21B33/12; E21B33/129; E21B33/1295; E21B23/00; E21B23/04; E21B23/0411; E21B23/04115; E21B43/00; E21B43/14; E21B43/25; E21B43/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2699212A
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US2609881A
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US2602513A
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US2642142A
Cited
USRE23733E
Cited
US2762638A
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US2783026A
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US2805532A
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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) | 1963-03-08 | 1963-09-07 | 1964-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-08 | 1967-09-07 | 1968-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-08 | 1971-09-07 | 1972-03-08 | $7700.00 | Window Closed / Lapsed |