Patent US3865118A successfully refreshed from Google Patents.
US1381645A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cementing wells
Assignee: DAVID W LEWIS
•
Filing: 1921-01-04
•
Granted: 1921-06-14
•
Expires: 1941-01-04
Abstract
No abstract record available.
Inventors
- 👤 Philo B Kinniear
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:05
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/10; E21B33/13; E21B33/14
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) | 1924-06-13 | 1924-12-13 | 1925-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1928-06-13 | 1928-12-13 | 1929-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1932-06-13 | 1932-12-13 | 1933-06-14 | $7700.00 | Window Closed / Lapsed |