Patent US3180633A successfully refreshed from Google Patents.
US3180633A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for producing ultraclean alloy steels
Assignee: Pennwalt Corp
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Filing: 1962-07-18
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Granted: 1965-04-27
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Expires: 1982-07-18
Abstract
No abstract record available.
Inventors
- 👤 Kendrick C Taylor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 01:12
CPC Classifications
C; C21; C21C; C21C7/00; C21C7/10
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
67 words
MOLTEN STEEL HANDLING APPARATUS COMPRISING A CHAMBER, VACUUM MEANS FOR EVACUATING SAID CHAMBER, A NONMAGNETIC LADLE IN SAID CHAMBER FOR RECEIVING MOLTEN METAL, SAID LADLE INCLUDING A CUP-SHAPED FIBERGLASS SHELL, AND INDUCTIVE MEANS IN SAID CHAMBER FOR INDUCING LOW FREQUENCY ELECTRO-MAGNETIC FORCE CURRENTS IN MOLTEN METAL IN SAID LADLE TO CONTINUOUSLY MOVE MOLTEN METAL UP TO THE SURFACE LEVEL THEREOF WHILE SAID LADLE IS IN SAID CHAMBER.
Claim 2
Dependent Claim
67 words
MOLTEN STEEL HANDLING APPARATUS COMPRISING A CHAMBER, VACUUM MEANS FOR EVACUATING SAID CHAMBER, A NONMAGNETIC LADLE IN SAID CHAMBER FOR RECEIVING MOLTEN METAL, SAID LADLE INCLUDING A CUP-SHAPED FIBERGLASS SHELL, AND INDUCTIVE MEANS IN SAID CHAMBER FOR INDUCING LOW FREQUENCY ELECTRO-MAGNETIC FORCE CURRENTS IN MOLTEN METAL IN SAID LADLE TO CONTINUOUSLY MOVE MOLTEN METAL UP TO THE SURFACE LEVEL THEREOF WHILE SAID LADLE IS IN SAID CHAMBER.
Claim 3
Dependent Claim
88 words
MOLTEN STEEL HANDLING APPARATUS COMPRISING A CHAMBER, VACUUM MEANS FOR EVACUATING SAID CHAMBER, A NONMAGNETIC, LADLE IN SAID CHAMBER FOR RECEIVING MOLTEN METAL, INDUCTIVE MEANS IN SAID CHAMBER FOR INDUCING LOW FREQUENCY ELECTRO-MAGNETIC FORCE CURRENTS IN MOLTEN METAL IN SAID LADLE TO CONTINUOUSLY MOVE METAL UP TO THE SURFACE LEVEL THEREOF WHILE SAID LADLE IS IN SAID CHAMBER, A HOLLOW STAND IN SAID CHAMBER FOR RECEIVING AND REMOVABLY SUPPORTING SAID LADLE, SAID STAND SUPPORTING SAID INDUCTIVE MEANS, AND SAID INDUCTIVE MEANS INCLUDING A COIL CONCENTRIC WITH SAID LADLE.
Claim 4
Dependent Claim
88 words
MOLTEN STEEL HANDLING APPARATUS COMPRISING A CHAMBER, VACUUM MEANS FOR EVACUATING SAID CHAMBER, A NONMAGNETIC, LADLE IN SAID CHAMBER FOR RECEIVING MOLTEN METAL, INDUCTIVE MEANS IN SAID CHAMBER FOR INDUCING LOW FREQUENCY ELECTRO-MAGNETIC FORCE CURRENTS IN MOLTEN METAL IN SAID LADLE TO CONTINUOUSLY MOVE METAL UP TO THE SURFACE LEVEL THEREOF WHILE SAID LADLE IS IN SAID CHAMBER, A HOLLOW STAND IN SAID CHAMBER FOR RECEIVING AND REMOVABLY SUPPORTING SAID LADLE, SAID STAND SUPPORTING SAID INDUCTIVE MEANS, AND SAID INDUCTIVE MEANS INCLUDING A COIL CONCENTRIC WITH SAID LADLE.
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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) | 1968-04-26 | 1968-10-26 | 1969-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-26 | 1972-10-26 | 1973-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-26 | 1976-10-26 | 1977-04-27 | $7700.00 | Window Closed / Lapsed |