US2343113A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treating drilling muds
Assignee: Union Oil Company of California
•
Filing: 1939-02-14
•
Granted: 1944-02-29
•
Expires: 1959-02-14
Abstract
No abstract record available.
Inventors
- 👤 Philip H Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:22
CPC Classifications
E; E21; E21B; E21B21/00; E21B21/06; E21B21/068; B; B01; B01D; B01D29/00; B01D29/01; B01D29/05
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1947-02-28 | 1947-08-30 | 1948-02-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1951-02-28 | 1951-08-30 | 1952-02-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1955-02-28 | 1955-08-30 | 1956-02-29 | $7700.00 | Window Closed / Lapsed |