US2616187A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Well surveying instrument
Assignee: Sperry Sun Well Surveying Co
•
Filing: 1950-02-08
•
Granted: 1952-11-04
•
Expires: 1970-02-08
Abstract
No abstract record available.
Inventors
- 👤 Einar T Young
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:18
CPC Classifications
E; E21; E21B; E21B47/00; E21B47/02; E21B47/022
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US856990A
Cited
US1424804A
Cited
GB117161A
Cited
US1376727A
Cited
US1294710A
Cited
US1987696A
Cited
US2026919A
Cited
US2124892A
Cited
US2192148A
Cited
US2428346A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-11-04 | 1956-05-05 | 1956-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-11-04 | 1960-05-05 | 1960-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-11-04 | 1964-05-05 | 1964-11-04 | $7700.00 | Window Closed / Lapsed |