Patent US5009667A successfully refreshed from Google Patents.
Patent US4696795A successfully refreshed from Google Patents.
US4696795A
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Test medium for detecting phosphorus segregates in metallic material
Assignee: JFE Steel Corp
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Filing: 1985-10-10
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Granted: 1987-09-29
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Expires: 2005-10-10
Abstract
Abstract A sheet impregnated with an aqueous solution of silver nitrate is effective to detect phosphorus segregates in a metallic material, particularly cast steel. Segregated phosphorus can be detected by etching a surface of steel to be tested, attaching test paper onto the steel surface, applying an aqueous solution of 0.1 to 80% by weight of silver nitrate to the test paper, maintaining the test paper in contact with the steel surface for a sufficient time, removing the test paper from the steel surface, and subjecting the test paper to fixing treatment.
Inventors
- 👤 Yoshiko Funahashi
- 👤 Yoshikazu Kamino
- 👤 Yasuharu Matsumura
- 👤 Senichi Harimaya
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:32
CPC Classifications
G; G01; G01N; G01N31/00; G01N31/22; G01N31/221; G01N33/00; G01N33/20; G01N33/202; G01N33/2022; Y; Y10; Y10T; Y10T436/00; Y10T436/16; Y10T436/19; Y10T436/193333; Y10T436/25; Y10T436/25125
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
36 words
A test medium for use in detecting phosphorus segregates in a metallic material, in the form of a sheet impregnated with an aqueous solution consisting of 0.1 to 80% by weight of silver nitrate in water.
Claim 2
Dependent Claim
36 words
A test medium for use in detecting phosphorus segregates in a metallic material, in the form of a sheet impregnated with an aqueous solution consisting of 0.1 to 80% by weight of silver nitrate in water.
Claim 3
Dependent Claim
12 words
The test medium according to claim 1 wherein the sheet is paper.
Claim 4
Dependent Claim
38 words
A test medium for use in detecting phosphorus segregates in a metallic material, in the form of a sheet impregnated with an aqueous solution consisting of 0.1 to 80% by weight of silver nitrate in water and alcohol.
Claim 5
Dependent Claim
38 words
A test medium for use in detecting phosphorus segregates in a metallic material, in the form of a sheet impregnated with an aqueous solution consisting of 0.1 to 80% by weight of silver nitrate in water and alcohol.
Claim 6
Dependent Claim
15 words
The test medium according to claim 3 wherein the alcohol is a lower alkyl alcohol.
Claim 7
Dependent Claim
42 words
A test medium for use in detecting phosphorus segregates in a metallic material, consisting of a sheet having material incorporated therein in a dry state which consists of a substantial amount of silver nitrate to detect phosphorus segregates in a metallic material.
Claim 8
Dependent Claim
42 words
A test medium for use in detecting phosphorus segregates in a metallic material, consisting of a sheet having material incorporated therein in a dry state which consists of a substantial amount of silver nitrate to detect phosphorus segregates in a metallic material.
Claim 9
Dependent Claim
12 words
The test medium according to claim 5, wherein the sheet is paper.
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) | 1990-09-28 | 1991-03-30 | 1991-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-09-28 | 1995-03-30 | 1995-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-09-28 | 1999-03-30 | 1999-09-29 | $7700.00 | Window Closed / Lapsed |