Patent US1920210A successfully refreshed from Google Patents.
Patent US3546127A successfully refreshed from Google Patents.
US3546127A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluorescent penetrant for and method of detecting surface discontinuities
Assignee: Magnaflux Corp
•
Filing: 1967-11-24
•
Granted: 1970-12-08
•
Expires: 1987-11-24
Abstract
No abstract record available.
Inventors
- 👤 Adolf Mlot-Fijalkowski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 06:29
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/06; G; G01; G01N; G01N21/00; G01N21/84; G01N21/88; G01N21/91
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-12-07 | 1974-06-08 | 1974-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-07 | 1978-06-08 | 1978-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-07 | 1982-06-08 | 1982-12-08 | $7700.00 | Window Closed / Lapsed |