US2435985A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromagnetic apparatus for detecting flaws in suspended pipe
Assignee: Sunoco Inc
•
Filing: 1942-08-12
•
Granted: 1948-02-17
•
Expires: 1962-08-12
Abstract
No abstract record available.
Inventors
- 👤 William H Stewart
- 👤 John W Millington
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:33
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/72; G01N27/82; G01N27/83
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US890085A
Cited
US1459970A
Cited
US1933547A
Cited
US1907864A
Cited
US2186826A
Cited
US2194229A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-02-16 | 1951-08-18 | 1952-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-02-16 | 1955-08-18 | 1956-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-02-16 | 1959-08-18 | 1960-02-17 | $7700.00 | Window Closed / Lapsed |