US2790140A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and means for testing ferrous material
Assignee: Houston Oil Field Material Co Inc
•
Filing: 1951-10-03
•
Granted: 1957-04-23
•
Expires: 1971-10-03
Abstract
No abstract record available.
Inventors
- 👤 Bender John Carlos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:34
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/72; G01N27/82; G01N27/90; G01N27/9006; F; F16; F16L; F16L2101/00; F16L2101/30
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USRE15859E
Cited
US1129584A
Cited
US2057835A
Cited
US2065119A
Cited
US2237254A
Cited
US2353211A
Cited
US2511233A
Cited
US2489920A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-04-22 | 1960-10-22 | 1961-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-22 | 1964-10-22 | 1965-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-22 | 1968-10-22 | 1969-04-23 | $7700.00 | Window Closed / Lapsed |