US2998066A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of treating wells
Assignee: CHARLES N MCCLENDON
•
Filing: 1957-04-19
•
Granted: 1961-08-29
•
Expires: 1977-04-19
Abstract
No abstract record available.
Inventors
- 👤 Sr Jeddy D Nixon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 02:46
CPC Classifications
E; E21; E21B; E21B37/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US949567A
Cited
US1448997A
Cited
US2139595A
Cited
US2259428A
Cited
US2699832A
Cited
US2708481A
Cited
US2776714A
Cited
US2967121A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-08-28 | 1965-02-27 | 1965-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-28 | 1969-02-27 | 1969-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-28 | 1973-02-27 | 1973-08-29 | $7700.00 | Window Closed / Lapsed |