Patent US2703145A successfully refreshed from Google Patents.
US2703145A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Well cementing device with jet recycling
Assignee: Standard Oil Development Co
•
Filing: 1953-05-29
•
Granted: 1955-03-01
•
Expires: 1973-05-29
Abstract
No abstract record available.
Inventors
- 👤 Alexander B Hildebrandt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:40
CPC Classifications
E; E21; E21B; E21B41/00; E21B41/0078; E21B17/00; E21B17/14; 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)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-02-28 | 1958-08-30 | 1959-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-02-28 | 1962-08-30 | 1963-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-02-28 | 1966-08-30 | 1967-03-01 | $7700.00 | Window Closed / Lapsed |