Patent US1741804A successfully refreshed from Google Patents.
Patent US3805301A successfully refreshed from Google Patents.
US2552901A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of controlling wells
Assignee: OTIS PRESSURE CONTROL Inc
•
Filing: 1949-05-16
•
Granted: 1951-05-15
•
Expires: 1969-05-16
Abstract
No abstract record available.
Inventors
- 👤 Ira A Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:14
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/02; E21B33/03; E21B33/068; Y; Y10; Y10T; Y10T137/00; Y10T137/598; Y10T137/5983
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) | 1954-05-14 | 1954-11-13 | 1955-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-14 | 1958-11-13 | 1959-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-14 | 1962-11-13 | 1963-05-15 | $7700.00 | Window Closed / Lapsed |