Patent US3500181A successfully refreshed from Google Patents.
US3500181A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Eddy current flow detection apparatus utilizing a plurality of circumferential sensors
Assignee: Armco Inc
•
Filing: 1967-04-21
•
Granted: 1970-03-10
•
Expires: 1987-04-21
Abstract
No abstract record available.
Inventors
- 👤 James F Jackson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:03
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/72; G01N27/82; G01N27/90; G01N27/904
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2065118A
Cited
GB594158A
Cited
GB631987A
Cited
GB641732A
Cited
US2889513A
Cited
US2980850A
Cited
US3029382A
Cited
US3281667A
Cited
US3234457A
Cited
US3271664A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-09 | 1973-09-08 | 1974-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-09 | 1977-09-08 | 1978-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-09 | 1981-09-08 | 1982-03-10 | $7700.00 | Window Closed / Lapsed |