US4124484A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Developer composition and process for penetrant inspection
Assignee: RONALD SHERWIN
•
Filing: 1978-01-26
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Granted: 1978-11-07
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Expires: 1998-01-26
Abstract
Abstract Dry developer composition in powder form and process for using same in the inspection of metal surfaces for cracks and defects open to the surface by the penetrant process. The powder composition of this invention has special significance in providing easier to see flaw indications when used with the fluorescent penetrant method of inspection.
Inventors
- 👤 Amos G. Sherwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:45
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/84; G01N21/88; G01N21/91; Y; Y10; Y10S; Y10S252/00; Y10S252/96
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
45 words
A dry powder developer composition for inspection of surfaces by the fluorescent penetrant method which composition consists of 30% or more by weight of aluminum benzoate powder with the aluminum benzoate powder in finely divided form having a particle size of less than 2 microns.
Claim 2
Dependent Claim
45 words
A dry powder developer composition for inspection of surfaces by the fluorescent penetrant method which composition consists of 30% or more by weight of aluminum benzoate powder with the aluminum benzoate powder in finely divided form having a particle size of less than 2 microns.
Claim 3
Dependent Claim
21 words
A flourescent penetrant process which utilizes a developer composition as described in claim 1 to increase the visibility of flaw indications.
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) | 1981-11-06 | 1982-05-08 | 1982-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-11-06 | 1986-05-08 | 1986-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-11-06 | 1990-05-08 | 1990-11-07 | $7700.00 | Window Closed / Lapsed |