US3946597A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flaw penetrant test panel
Assignee: Turco Products Inc
•
Filing: 1974-04-26
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Granted: 1976-03-30
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Expires: 1994-04-26
Abstract
Abstract A flaw penetrant test panel having a sheet metal surface in which are impressed tiny or microscopic flaw simulating cavities distributed over the test surface to receive one or more penetrants being tested, the mouth size of the cavities being in the range of about 1 to 10 thousandth inch and being formed by heating the metal to incipient softening temperature followed by penetration of the surface test area using a needle-like tool proportioned to the desired cavity size and depth and which upon penetration of the metal displaces it in a crater-like rim about the cavity being formed.
Inventors
- 👤 John A. Tahbaz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:52
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/84; G01N21/88; G01N21/91; G01N21/93
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
80 words
A flaw penetrant test panel having a sheet metal surface in which are formed tiny flaw simulating cavities distributed over said surface to receive test penetrant, the mouth size of the cavities being in the range of about 1 to 10 thousandth inch, the cavities being formed by heating the surface layer of the sheet metal to incipient softening and forcing a penetrating tool into the surface layer to a desired depth whereby cavities having crater-like raised rims are formed.
Claim 2
Dependent Claim
80 words
A flaw penetrant test panel having a sheet metal surface in which are formed tiny flaw simulating cavities distributed over said surface to receive test penetrant, the mouth size of the cavities being in the range of about 1 to 10 thousandth inch, the cavities being formed by heating the surface layer of the sheet metal to incipient softening and forcing a penetrating tool into the surface layer to a desired depth whereby cavities having crater-like raised rims are formed.
Claim 3
Dependent Claim
17 words
Panel according to claim 1 in which the cavity depth is about 1 to 20 thousandth inch.
Claim 4
Dependent Claim
22 words
Panel according to claim 1 in which the surface area distribution of the cavities is about 3 to 100 per square inch.
Claim 5
Dependent Claim
21 words
Panel according to claim 1 in which said panel is a surface lamination rigidized by bonding to a supporting metallic lamination.
Claim 6
Dependent Claim
15 words
Panel according to claim 4 in which said surface lamination is commercial grade sheet aluminum.
Claim 7
Dependent Claim
14 words
Panel according to claim 5 in which said supporting lamination is sheet aluminum alloy.
Claim 8
Dependent Claim
49 words
A flaw penetrant test panel having a sheet metal surface in which are formed tiny flaw simulating cavities distributed over said surface to receive test penetrant, the mouth size of the cavities being in the range of about 1 to 10 thousandth inch, said cavities having crater-like raised rims.
Claim 9
Dependent Claim
49 words
A flaw penetrant test panel having a sheet metal surface in which are formed tiny flaw simulating cavities distributed over said surface to receive test penetrant, the mouth size of the cavities being in the range of about 1 to 10 thousandth inch, said cavities having crater-like raised rims.
Claim 10
Dependent Claim
17 words
Panel according to claim 7 in which the cavity depth is about 1 to 20 thousandth inch.
Claim 11
Dependent Claim
26 words
Panel according to claim 7 in which said panel is a surface lamination of commercial grade sheet aluminum rigidized by bonding to a supporting metallic lamination.
References Cited (Backward Citations)
US3164006A
Cited
US3791198A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-03-30 | 1979-09-29 | 1980-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-30 | 1983-09-29 | 1984-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-30 | 1987-09-29 | 1988-03-30 | $7700.00 | Window Closed / Lapsed |