US2809886A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plunger for the introduction of substances with low vaporization temperature into liquid melts
Assignee: Huntington Alloys Corp
•
Filing: 1956-02-01
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Granted: 1957-10-15
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Expires: 1976-02-01
Abstract
No abstract record available.
Inventors
- 👤 Klingbeil Herbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:04
CPC Classifications
C; C21; C21C; C21C1/00; C21C1/10; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12222; Y10T428/12389
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
141 words
IN AN APPARATUS ADAPTED FOR THE TREAMENT OF MOLTEN METAL UNDER PRESSURE AND COMPRISING A PRESSURE VESSEL HAVING A LID ADAPTED TO CLOSE SAID VESSEL IN PRESSURE-TIGHT RELATION, SAID LID HAVING CONNECTEDTHERETO A PLUNGER ADAPTED TO HOLD ADDITION MATERIAL ON THE FREE END THEREOF AND TO INSERT SAID ADDITION MATERIAL INTO MOLTEN METAL HELD IN SAID VESSEL WHEN SAID LID IS IN PRESSURE-TIGHT RELATION TO SAID VESSEL, THE IMPROVEMENT WHICH COMPRISES A PLUNGER HAVING A CARRIER PORTION ADAPTED TO BE DETACHABLY CONNECTED TO THE PRESSURE VESSEL LID AND ADDITION MATERIAL ATTACHED TO THE FREE END OF SAID CARRIER, SAID PLUNGER BEING COATED BY A LAYER OF REFRACTORY HEAT INSULATING MATERIAL PROVIDING A SUBSTANTIALLY CYLINDRICAL FORM TO THE COATED PLUNGER AND SAID LAYER HAVING A WALL THICKNESS DECREASING TOWARD THE FREE END OF THE PLUNGER IN THE REGION OF THE ADDITION MATERIAL.
Claim 2
Dependent Claim
141 words
IN AN APPARATUS ADAPTED FOR THE TREAMENT OF MOLTEN METAL UNDER PRESSURE AND COMPRISING A PRESSURE VESSEL HAVING A LID ADAPTED TO CLOSE SAID VESSEL IN PRESSURE-TIGHT RELATION, SAID LID HAVING CONNECTEDTHERETO A PLUNGER ADAPTED TO HOLD ADDITION MATERIAL ON THE FREE END THEREOF AND TO INSERT SAID ADDITION MATERIAL INTO MOLTEN METAL HELD IN SAID VESSEL WHEN SAID LID IS IN PRESSURE-TIGHT RELATION TO SAID VESSEL, THE IMPROVEMENT WHICH COMPRISES A PLUNGER HAVING A CARRIER PORTION ADAPTED TO BE DETACHABLY CONNECTED TO THE PRESSURE VESSEL LID AND ADDITION MATERIAL ATTACHED TO THE FREE END OF SAID CARRIER, SAID PLUNGER BEING COATED BY A LAYER OF REFRACTORY HEAT INSULATING MATERIAL PROVIDING A SUBSTANTIALLY CYLINDRICAL FORM TO THE COATED PLUNGER AND SAID LAYER HAVING A WALL THICKNESS DECREASING TOWARD THE FREE END OF THE PLUNGER IN THE REGION OF THE ADDITION MATERIAL.
References Cited (Backward Citations)
US2158517A
Cited
US2662008A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-10-14 | 1961-04-15 | 1961-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-14 | 1965-04-15 | 1965-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-14 | 1969-04-15 | 1969-10-15 | $7700.00 | Window Closed / Lapsed |