US2776014A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tool for fracturing earth formations
Assignee: ExxonMobil Oil Corp
•
Filing: 1953-12-14
•
Granted: 1957-01-01
•
Expires: 1973-12-14
Abstract
No abstract record available.
Inventors
- 👤 John A Lee
- 👤 Harry A Barclay
- 👤 Malcolm O Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:12
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/10; E21B33/12; E21B33/127; E21B43/00; E21B43/25; E21B43/26
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1960-01-01 | 1960-07-02 | 1961-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-01 | 1964-07-02 | 1965-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-01 | 1968-07-02 | 1969-01-01 | $7700.00 | Window Closed / Lapsed |