US2502469A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for use in the visual inspection of sheet metal
Assignee: Inland Steel Co
•
Filing: 1945-09-19
•
Granted: 1950-04-04
•
Expires: 1965-09-19
Abstract
No abstract record available.
Inventors
- 👤 Edwin D Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 20:31
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/84; G01N21/88; G01N21/8803
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR477356A
Cited
US1884920A
Cited
US1100769A
Cited
US1245242A
Cited
US1900633A
Cited
US1965819A
Cited
US2312626A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-04-03 | 1953-10-03 | 1954-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-04-03 | 1957-10-03 | 1958-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-04-03 | 1961-10-03 | 1962-04-04 | $7700.00 | Window Closed / Lapsed |