Patent US3193889A successfully refreshed from Google Patents.
US3193889A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for producing uniform grain refinement in metal ingots
Assignee: Westinghouse Electric Corp
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Filing: 1961-07-24
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Granted: 1965-07-13
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Expires: 1981-07-24
Abstract
No abstract record available.
Inventors
- 👤 Donald H Lane
- 👤 James W Cunningham
- 👤 Mcdonald Jack
- 👤 William A Tiller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:21
CPC Classifications
C; C22; C22B; C22B9/00; C22B9/16; C22B9/20; B; B22; B22D; B22D27/00; B22D27/20; B22D7/00; B22D7/005; C22B4/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
AN ELECTRIC ARC-MELTING FURNACE COMPRISING AN ELONGATED CRUCIBLE CAPABLE OF CONTAINING A SOLIDIFYING INGOT, A MELTING ELECTRODE DISPOSED IN THE CRUCIBLE, SAID CRUBILE COMPRISING SIDE WALLS AND A BOTTOM CLOSURE, MEANS SEALING THE BOTTOM CLOSURE TO THE SIDE WALLS TO PROVIDE A GAS-TIGHT SEAL, SAID BOTTOM CLOSURE ADAPTED TO BE WELDED TO SAID SOLIDIFYING INGOT AND AN ULTRASONIC TRANSDUCER UNIT COMPRISING A WAVE TRANSMITTING COULPLING BAR AND A TRANSDUCER STACK ATTACHED BY A LOW LOSS JOINT TO THE BAR, THE WAVE TRANSMITTING COUPLING BAR OF THE TRANDUCER UNIT BEING INTEGRAL WITH THE BOTTOM CLOSURE, WHEREBY ULTRASONIC ENERGY IS DIRECTLY TRANSMITTED THROUGH THE SAID WAVE TRASMITTING COUPLING BAR TO THE BOTTOM CLOSURE OF THE ELONGATED CRUCIBLE AND THENCE DIRECTLY TO MOLTEN METAL
Claim 2
Dependent Claim
121 words
AN ELECTRIC ARC-MELTING FURNACE COMPRISING AN ELONGATED CRUCIBLE CAPABLE OF CONTAINING A SOLIDIFYING INGOT, A MELTING ELECTRODE DISPOSED IN THE CRUCIBLE, SAID CRUBILE COMPRISING SIDE WALLS AND A BOTTOM CLOSURE, MEANS SEALING THE BOTTOM CLOSURE TO THE SIDE WALLS TO PROVIDE A GAS-TIGHT SEAL, SAID BOTTOM CLOSURE ADAPTED TO BE WELDED TO SAID SOLIDIFYING INGOT AND AN ULTRASONIC TRANSDUCER UNIT COMPRISING A WAVE TRANSMITTING COULPLING BAR AND A TRANSDUCER STACK ATTACHED BY A LOW LOSS JOINT TO THE BAR, THE WAVE TRANSMITTING COUPLING BAR OF THE TRANDUCER UNIT BEING INTEGRAL WITH THE BOTTOM CLOSURE, WHEREBY ULTRASONIC ENERGY IS DIRECTLY TRANSMITTED THROUGH THE SAID WAVE TRASMITTING COUPLING BAR TO THE BOTTOM CLOSURE OF THE ELONGATED CRUCIBLE AND THENCE DIRECTLY TO MOLTEN METAL
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-07-12 | 1969-01-11 | 1969-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-07-12 | 1973-01-11 | 1973-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-07-12 | 1977-01-11 | 1977-07-13 | $7700.00 | Window Closed / Lapsed |