US4261740A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for analyzing nodular or vermicular cast iron samples
Assignee: M-R OHIO Inc A OHIO CORP
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Filing: 1979-05-18
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Granted: 1981-04-14
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Expires: 1999-05-18
Abstract
Abstract A sample of nodular or vermicular cast iron has magnesium and/or cerium atoms therein neutralized by the addition of selenium or sulphur in the presence of tellurium.
Inventors
- 👤 Jacques J. Plessers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:33
CPC Classifications
G; G01; G01N; G01N1/00; G01N1/28; G01N1/44; G01N33/00; G01N33/20; G01N33/205
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
87 words
Apparatus for use in analysis of a sample of molten iron capable of solidifying as iron selected from the group consisting of nodular and vermicular cast iron comprising a sampling crucible, an element selected from the group consisting of sulphur and selenium within and supported by said crucible in an amount effective to bind cerium and magnesium atoms within said sample, and tellurium within and supported by said crucible in an amount effective to stabilize iron carbides formed during the cooling of said sample within said crucible.
Claim 2
Dependent Claim
87 words
Apparatus for use in analysis of a sample of molten iron capable of solidifying as iron selected from the group consisting of nodular and vermicular cast iron comprising a sampling crucible, an element selected from the group consisting of sulphur and selenium within and supported by said crucible in an amount effective to bind cerium and magnesium atoms within said sample, and tellurium within and supported by said crucible in an amount effective to stabilize iron carbides formed during the cooling of said sample within said crucible.
Claim 3
Dependent Claim
25 words
Apparatus according to claim 1 wherein said element and said tellurium are in the form of blobs disposed on the interior surface of said crucible.
Claim 4
Dependent Claim
22 words
Apparatus according to claim 1 wherein said element and said tellurium are formed as layers upon the inner surface of said crucible.
Claim 5
Dependent Claim
25 words
Apparatus according to claim 1 further comprising a temperature sensor within said crucible and electrical contacts supported by said crucible and connected to said sensor.
Claim 6
Dependent Claim
42 words
Apparatus according to claim 1 wherein said element is sulphur present in an amount of 0.08 to 1% by weight of the sample to be added to said crucible and said tellurium is present in an amount of about 0.1% by weight.
Claim 7
Dependent Claim
123 words
Apparatus for use in analysis of a sample of molten iron comprising a cup-shaped sampling crucible open at the top, an element selected from the group consisting of sulphur and selenium within and supported by said crucible, said element being in the form of a blob on the inner surface of said crucible and in amount effective to bind cerium and magnesium atoms within a sample poured into said crucible, telurium in the form of a blob within and supported by the inner surface of said crucible in an amount effective to stabilize iron carbides formed during the cooling of a sample within said crucible, and a temperature sensor within said crucible, electrical contacts supported by said crucible and connected to said sensor.
Claim 8
Dependent Claim
123 words
Apparatus for use in analysis of a sample of molten iron comprising a cup-shaped sampling crucible open at the top, an element selected from the group consisting of sulphur and selenium within and supported by said crucible, said element being in the form of a blob on the inner surface of said crucible and in amount effective to bind cerium and magnesium atoms within a sample poured into said crucible, telurium in the form of a blob within and supported by the inner surface of said crucible in an amount effective to stabilize iron carbides formed during the cooling of a sample within said crucible, and a temperature sensor within said crucible, electrical contacts supported by said crucible and connected to said sensor.
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) | 1984-04-13 | 1984-10-13 | 1985-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-04-13 | 1988-10-13 | 1989-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-04-13 | 1992-10-13 | 1993-04-14 | $7700.00 | Window Closed / Lapsed |