US3217368A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal flow regulation
Assignee: Rio Tinto Switzerland AG
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Filing: 1962-08-21
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Granted: 1965-11-16
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Expires: 1982-08-21
Abstract
No abstract record available.
Inventors
- 👤 Pototschnigg Gunter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:55
CPC Classifications
B; B22; B22D; B22D11/00; B22D11/16; B22D11/18; G; G05; G05D; G05D9/00; G05D9/12; Y; Y10; Y10T; Y10T137/00; Y10T137/0318; Y10T137/0324; Y10T137/7287; Y10T137/7306
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
THE METHOD FOR MAINTAINING THE LEVEL OF FLOWING LIQUID METAL AT A CONSTANT HEIGHT, DETERMINING THE HEIGHT OF THE LEVEL BY MEANS OF MEASURING THE ELECTRICAL CAPACITY BETWEEN AN ELECTRICALLY CONDUCTING MEASURING PLATE ARRANGED IN DISTANCE ABOVE AND PARALLEL TO THE METAL LEVEL, AND THE SURFACE OF THE METAL MELT, AND AUTOMATICALLY REGULATING THE METAL FLOW IN RESPONSE TO ANY CHANGE IN THE HEIGHT OF THE LEVEL DETERMINED.
Claim 2
Independent Claim
68 words
THE METHOD FOR MAINTAINING THE LEVEL OF FLOWING LIQUID METAL AT A CONSTANT HEIGHT, DETERMINING THE HEIGHT OF THE LEVEL BY MEANS OF MEASURING THE ELECTRICAL CAPACITY BETWEEN AN ELECTRICALLY CONDUCTING MEASURING PLATE ARRANGED IN DISTANCE ABOVE AND PARALLEL TO THE METAL LEVEL, AND THE SURFACE OF THE METAL MELT, AND AUTOMATICALLY REGULATING THE METAL FLOW IN RESPONSE TO ANY CHANGE IN THE HEIGHT OF THE LEVEL DETERMINED.
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) | 1968-11-15 | 1969-05-17 | 1969-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-15 | 1973-05-17 | 1973-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-15 | 1977-05-17 | 1977-11-16 | $7700.00 | Window Closed / Lapsed |