US2636127A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of detecting cracks in porous surfaces
Assignee: Magnaflux Corp
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Filing: 1949-03-14
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Granted: 1953-04-21
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Expires: 1969-03-14
Abstract
No abstract record available.
Inventors
- 👤 Forest Taber De
- 👤 Henry N Staats
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:48
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/84; G01N21/88; G01N21/91
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
14 words
THE METHOD OF DETECTING CRACKS IN POROUS BODIES AND BODIES HAVING POROUS SURFACES, WHICH
Claim 2
Independent Claim
14 words
THE METHOD OF DETECTING CRACKS IN POROUS BODIES AND BODIES HAVING POROUS SURFACES, WHICH
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) | 1956-04-20 | 1956-10-20 | 1957-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-04-20 | 1960-10-20 | 1961-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-04-20 | 1964-10-20 | 1965-04-21 | $7700.00 | Window Closed / Lapsed |