US4899356A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of radiographic inspection of wooden members
Assignee: GOVERNMENT OF UNITE STATES AERONAUTJICS AND SPACE ADMINISTRATION, Administrator of
•
Filing: 1987-11-25
•
Granted: 1990-02-06
•
Expires: 2007-11-25
Abstract
Abstract The invention is a method of radiographic inspection of a wooden specimen 11 for internal defects which includes the steps of introducing a radiopaque penetrant into any internal defects in said specimen 11 through surface openings therein; passing a beam of radiation through a portion of the specimen to be inspected; and making a radiographic film image of the radiation passing through said specimen, the radiopaque penetrant in said specimen absorbing a portion of said radiation passing therethrough, thereby enhancing the resulting image of said internal defects in said specimen 11.
Inventors
- 👤 Maggie L. Berry
- 👤 Robert F. Berry, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 01:18
CPC Classifications
G; G01; G01N; G01N23/00; G01N23/02; G01N23/06; G01N23/18; G01N23/083
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
110 words
A non-contaminating method of radiographic inspection of a wooden specimen comprising the steps of: introducing a non-contaminating, highly evaporative radiopaque penetrant formed of a fluorocarbon cleaning solvent into internal defects in said wooden specimen to be inspected through a surface opening therein; subjecting the wooden specimen to a beam of radiation sufficient to pass through said wooden specimen; and making a radiographic film image of said beam of radiation passing through said wooden specimen, said non-contaminating radiopaque penetrant in said internal defects within said specimen absorbing a portion of said beam of radiation passing therethrough, thereby enhancing the resulting film image of said internal defects without contaminating said wooden specimen.
Claim 2
Dependent Claim
110 words
A non-contaminating method of radiographic inspection of a wooden specimen comprising the steps of: introducing a non-contaminating, highly evaporative radiopaque penetrant formed of a fluorocarbon cleaning solvent into internal defects in said wooden specimen to be inspected through a surface opening therein; subjecting the wooden specimen to a beam of radiation sufficient to pass through said wooden specimen; and making a radiographic film image of said beam of radiation passing through said wooden specimen, said non-contaminating radiopaque penetrant in said internal defects within said specimen absorbing a portion of said beam of radiation passing therethrough, thereby enhancing the resulting film image of said internal defects without contaminating said wooden specimen.
Claim 3
Dependent Claim
49 words
The method of claim 1 including the steps of making a radiographic film image of said wooden specimen "before" introducing said radiopaque penetrant into said internal defects; and comparing said "before" radiographic film image with said radiographic film image made "after" introducing said radiopaque penetrant into said internal defects.
Claim 4
Dependent Claim
29 words
The method of claim 1 wherein said wooden specimen is quarter-sawn and said beam of radiation passes through said wooden specimen tangentially to the grain of said wooden specimens.
Claim 5
Dependent Claim
29 words
The method of claim 2 wherein said wooden specimen is quarter-sawn and said beam of radiation passes through said wooden specimen tangentially to the grain of said wooden specimen.
References Cited (Backward Citations)
DE223534C
Cited
US2516857A
Cited
US3279243A
Cited
US3704370A
Cited
US3764811A
Cited
US3899450A
Cited
US3904545A
Cited
US4172224A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-02-05 | 1993-08-07 | 1994-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-02-05 | 1997-08-07 | 1998-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-02-05 | 2001-08-07 | 2002-02-06 | $7700.00 | Window Closed / Lapsed |