Patent US2674412A successfully refreshed from Google Patents.
Patent US4090402A successfully refreshed from Google Patents.
US4090402A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Slow-solubility inspection penetrant composition containing a solubility accelerator
Assignee: Individual
•
Filing: 1977-06-20
•
Granted: 1978-05-23
•
Expires: 1997-06-20
Abstract
Abstract An inspection penetrant process and composition therefor in which the penetrant is formulated from a low-solubility liquid, and a solubility accelerator material is added to the formulation to enhance the washability of the penetrant to provide for more rapid removal of background porosity entrapments from test surfaces. The acceleration of solubility is accomplished while the features of slow-solubility and adaptability to recovery and re-cycling procedures are retained.
Inventors
- 👤 James R. Alburger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:07
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/84; G01N21/88; G01N21/91; Y; Y10; Y10S; Y10S252/00; Y10S252/96
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
In a water-washable inspection penetrant process in which a slow-solubility-type water-removable dyed liquid inspection penetrant is applied to a test surface, excess surface penetrant is removed by washing said test surface with water, leaving entrapments of penetrant in any crack defects which are present, and said test surface is inspected for the presence of flaw indications, the improvement wherein said slow-solubility-type penetrant consists essentially of the following formulation, stated in weight percentages: 2,2,4-trimethyl-1,3-pentanediol-diisobutyrate -- 94% to 5% Diethylene glycol butyl ether acetate -- 5% to 94% C.i. brightening Agent 68 -- 0.7% to 3.64% C.i. solvent Yellow -- 0.3% to 0.46%
Claim 2
Dependent Claim
101 words
In a water-washable inspection penetrant process in which a slow-solubility-type water-removable dyed liquid inspection penetrant is applied to a test surface, excess surface penetrant is removed by washing said test surface with water, leaving entrapments of penetrant in any crack defects which are present, and said test surface is inspected for the presence of flaw indications, the improvement wherein said slow-solubility-type penetrant consists essentially of the following formulation, stated in weight percentages: 2,2,4-trimethyl-1,3-pentanediol-diisobutyrate -- 94% to 5% Diethylene glycol butyl ether acetate -- 5% to 94% C.i. brightening Agent 68 -- 0.7% to 3.64% C.i. solvent Yellow -- 0.3% to 0.46%
References Cited (Backward Citations)
US2667070A
Cited
US2839918A
Cited
US3415112A
Cited
USRE28605E
Cited
US3751970A
Cited
US3543570A
Cited
US3558882A
Cited
US3896664A
Cited
US3926044A
Cited
US3929664A
Cited
US4037466A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-05-22 | 1981-11-21 | 1982-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-22 | 1985-11-21 | 1986-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-22 | 1989-11-21 | 1990-05-23 | $7700.00 | Window Closed / Lapsed |