Patent US2631672A successfully refreshed from Google Patents.
US2631672A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic well packer
Assignee: Standard Oil Development Co
•
Filing: 1949-03-09
•
Granted: 1953-03-17
•
Expires: 1969-03-09
Abstract
No abstract record available.
Inventors
- 👤 Robert H Blood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:09
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/10; E21B33/12; E21B33/124; E21B33/1243; E21B33/127; E21B33/1277; E21B49/00; E21B49/08
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1190790A
Cited
US1454469A
Cited
US1461984A
Cited
US2125665A
Cited
US2098484A
Cited
US2313762A
Cited
US2441894A
Cited
US2449514A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-03-16 | 1956-09-15 | 1957-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-03-16 | 1960-09-15 | 1961-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-03-16 | 1964-09-15 | 1965-03-17 | $7700.00 | Window Closed / Lapsed |