Patent US2878447A successfully refreshed from Google Patents.
US2878447A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for inspecting ferromagnetic members
Assignee: Tuboscope Co
•
Filing: 1957-04-03
•
Granted: 1959-03-17
•
Expires: 1977-04-03
Abstract
No abstract record available.
Inventors
- 👤 Berry G Price
- 👤 Julian H Unger
- 👤 Fenton M Wood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:08
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/72; G01N27/82; G01N27/90; G01N27/9093
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) | 1962-03-16 | 1962-09-15 | 1963-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-16 | 1966-09-15 | 1967-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-16 | 1970-09-15 | 1971-03-17 | $7700.00 | Window Closed / Lapsed |