US2943684A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Selective hydrofracting apparatus
Assignee: Individual
•
Filing: 1958-02-13
•
Granted: 1960-07-05
•
Expires: 1978-02-13
Abstract
No abstract record available.
Inventors
- 👤 Smith Ramsey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:26
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/25; E21B43/26; E21B33/00; E21B33/10; E21B33/12; E21B33/127
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-07-05 | 1964-01-04 | 1964-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-05 | 1968-01-04 | 1968-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-05 | 1972-01-04 | 1972-07-05 | $7700.00 | Window Closed / Lapsed |