US2773236A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for detecting ingress and egress of fluid in a borehole
Assignee: Gulf Research and Development Co
•
Filing: 1953-06-03
•
Granted: 1956-12-04
•
Expires: 1973-06-03
Abstract
No abstract record available.
Inventors
- 👤 B G Martin
- 👤 Ralph D Wyckoff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:44
CPC Classifications
E; E21; E21B; E21B47/00; E21B47/10; E21B47/113
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
DE304890C
Cited
US1440778A
Cited
US1437919A
Cited
US2032383A
Cited
US2202404A
Cited
US2580182A
Cited
US2596437A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-12-04 | 1960-06-04 | 1960-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-04 | 1964-06-04 | 1964-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-04 | 1968-06-04 | 1968-12-04 | $7700.00 | Window Closed / Lapsed |