Patent US2993275A successfully refreshed from Google Patents.
US2229638A
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Inspecting apparatus
Assignee: Bethlehem Steel Corp
•
Filing: 1938-08-03
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Granted: 1941-01-28
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Expires: 1958-08-03
Abstract
No abstract record available.
Inventors
- 👤 Alan C Chamberlin
- 👤 Henry W Nieman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:24
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/84; G01N21/88; G01N21/89; Y; Y10; Y10T; Y10T83/00; Y10T83/202; Y10T83/2022; Y10T83/2024; Y10T83/2033; Y10T83/2037; Y10T83/2042; Y10T83/2044; Y10T83/2074; Y10T83/2083; Y10T83/2085; Y10T83/2092; Y10T83/2096; Y10T83/2098
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1944-01-28 | 1944-07-29 | 1945-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-01-28 | 1948-07-29 | 1949-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-01-28 | 1952-07-29 | 1953-01-28 | $7700.00 | Window Closed / Lapsed |