US2541976A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Instrument for inspecting the interior of cavities
Assignee: Magnaflux Corp
•
Filing: 1947-11-22
•
Granted: 1951-02-20
•
Expires: 1967-11-22
Abstract
No abstract record available.
Inventors
- 👤 Henry G Bogart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:11
CPC Classifications
G; G02; G02B; G02B23/00; G02B23/24; G02B23/2407; G02B23/2423
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-02-19 | 1954-08-21 | 1955-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-19 | 1958-08-21 | 1959-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-19 | 1962-08-21 | 1963-02-20 | $7700.00 | Window Closed / Lapsed |