US3709040A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lances for taking samples of molten metal
Assignee: Land Pyrometers Ltd
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Filing: 1970-11-17
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Granted: 1973-01-09
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Expires: 1990-11-17
Abstract
Abstract A lance for taking a sample of molten metal comprising an outerhousing or elongated holder tube, a metal mould set at one end of the housing or holder tube, there being at least one opening in the housing or holder tube adjacent an opening in the mould to allow molten metal to flow into the mould when the lance is immersed in molten metal, a refractory lining to the mould, and temperature-sensing means within the mould adapted to record the liquidus arrest temperature of the sample within the mould.
Inventors
- 👤 C Coe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:21
CPC Classifications
G; G01; G01N; G01N1/00; G01N1/02; G01N1/10; G01N1/12; G01N1/125; Y; Y10; Y10S; Y10S73/00; Y10S73/09
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
110 words
A multi-layer lance for taking a sample of molten metal comprising an outer housing tube having thermal properties of a heat insulator, a mold of relatively non-insulating material compared to said housing tube set at one end of the housing tube, and a thin, preformed liner of refractor paper for said mold comprising alumino-silicate fibers, there being at least one opening in the housing tube and an adjacent opening in the mold to allow molten metal to flow into the mold when the lance is immersed in molten metal, and a temperature sensing means within the mold adapted to record the liquidus arrest temperature of the sample within the mold.
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) | 1976-01-09 | 1976-07-10 | 1977-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-09 | 1980-07-10 | 1981-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-09 | 1984-07-10 | 1985-01-09 | $7700.00 | Window Closed / Lapsed |