US2425319A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tool orienting method and apparatus
Assignee: Sperry Sun Well Surveying Co
•
Filing: 1942-12-23
•
Granted: 1947-08-12
•
Expires: 1962-12-23
Abstract
No abstract record available.
Inventors
- 👤 Hering Donald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:21
CPC Classifications
E; E21; E21B; E21B47/00; E21B47/02; E21B47/024; E21B47/022; E21B47/0236
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-08-11 | 1951-02-10 | 1951-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-08-11 | 1955-02-10 | 1955-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-08-11 | 1959-02-10 | 1959-08-12 | $7700.00 | Window Closed / Lapsed |