Patent US3716494A successfully refreshed from Google Patents.
US3716494A
Expired / Lapsed
US
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Dye penetrant remover
Assignee: Air Products and Chemicals Inc
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Filing: 1971-02-25
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Granted: 1973-02-13
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Expires: 1991-02-25
Abstract
Abstract Viscous compositions of gel-like consistency are disclosed for removing excess dye penetrant from parts subjected to liquid dye penetrant inspection. The compositions comprise a cleaner, a carrier, and a viscosity increasing agent, and have a viscosity between 10 and 100 poises at 100 reciprocal seconds.
Inventors
- 👤 O Molina
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 01:53
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/84; G01N21/88; G01N21/91
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
121 words
A highly viscous water-washable cleaning agent of gel-like consistency for removing excess liquid dye penetrant from a specimen surface without penetrating the minute surface defects and removing the residual dye entrapped therein thereby producing a dye pattern defined by the residual dye entrapped within the minute defects in such surface, said agent consisting of: from 1 to 2 parts by weight of a water-soluble pine oil, from 1 to 2 parts by weight of a nonionic surfactant, and from 1 to 8 parts by weight of distilled water, and either an amount of a viscosity increasing material or said surfactant being selected so as to cause said agent to have a viscosity between 10 and 100 poises at 100 reciprocal seconds.
Claim 2
Dependent Claim
121 words
A highly viscous water-washable cleaning agent of gel-like consistency for removing excess liquid dye penetrant from a specimen surface without penetrating the minute surface defects and removing the residual dye entrapped therein thereby producing a dye pattern defined by the residual dye entrapped within the minute defects in such surface, said agent consisting of: from 1 to 2 parts by weight of a water-soluble pine oil, from 1 to 2 parts by weight of a nonionic surfactant, and from 1 to 8 parts by weight of distilled water, and either an amount of a viscosity increasing material or said surfactant being selected so as to cause said agent to have a viscosity between 10 and 100 poises at 100 reciprocal seconds.
Claim 3
Dependent Claim
17 words
The agent set forth in claim 1 above wherein said viscosity increasing material consists of pyrogenic silica.
Claim 4
Dependent Claim
27 words
The agent set forth in claim 1 above, wherein: said nonionic surfactant consists of a nonyl phenyl polyethylene glycol ether containing about 10.5 mols of ethylene oxide.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-13 | 1976-08-14 | 1977-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-13 | 1980-08-14 | 1981-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-13 | 1984-08-14 | 1985-02-13 | $7700.00 | Window Closed / Lapsed |