Patent US3276758A successfully refreshed from Google Patents.
US3276758A
Expired / Lapsed
US
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Metal melting furnace system
Assignee: North American Aviation Corp
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Filing: 1963-04-24
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Granted: 1966-10-04
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Expires: 1983-04-24
Abstract
No abstract record available.
Inventors
- 👤 Richard S Baker
- 👤 Burg Martin
- 👤 John R Churchill
- 👤 Henry C Nette
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 23:04
CPC Classifications
F; F27; F27D; F27D3/00; F27D3/14; C; C22; C22B; C22B7/00; C22B7/001; C22B7/003; C22B9/00; C22B9/16; F27B; F27B14/00; F27B3/00; F27B3/02; F27B3/04; F27B3/045; F27B3/10; F27B3/12; F27B14/08; F27B14/0806; F27B2014/085; Y; Y02; Y02P; Y02P10/00; Y02P10/20; Y10; Y10S; Y10S266/00; Y10S266/90
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
A MELTING FURNACE SYSTEM HAVING A CHARGING WELL IN FLUID COMMUNICATION WITH LIQUID METAL IN A MELTING CHAMBER AND COMPRISING: (A) AT LEAST ONE HELICAL ROTOR ELECTROMAGNETIC PUMP, (B) AT LEAST ONE PUMP INLET FROM THE MELTING CHAMBER TO SAID PUMP MEANS, (C) AT LEAST ONE DISCHARGE CONDUIT FROM SAID PUMP MEANS, AND (D) A PLURALITY OF BRANCH CONDUITS CONNECTED TO SAID DISCHARGE CONDUIT, (E) AT LEAST ONE OF SAID BRANCH CONDUITS IN FLUID COMMUNICATION WITH THE CHARGING WELL TO DIRECT THE LIQUID METAL FROM THE MELTING CHAMBER TO THE CHARGING WELL UNDER PUMP INDUCED PRESSURE.
Claim 2
Dependent Claim
96 words
A MELTING FURNACE SYSTEM HAVING A CHARGING WELL IN FLUID COMMUNICATION WITH LIQUID METAL IN A MELTING CHAMBER AND COMPRISING: (A) AT LEAST ONE HELICAL ROTOR ELECTROMAGNETIC PUMP, (B) AT LEAST ONE PUMP INLET FROM THE MELTING CHAMBER TO SAID PUMP MEANS, (C) AT LEAST ONE DISCHARGE CONDUIT FROM SAID PUMP MEANS, AND (D) A PLURALITY OF BRANCH CONDUITS CONNECTED TO SAID DISCHARGE CONDUIT, (E) AT LEAST ONE OF SAID BRANCH CONDUITS IN FLUID COMMUNICATION WITH THE CHARGING WELL TO DIRECT THE LIQUID METAL FROM THE MELTING CHAMBER TO THE CHARGING WELL UNDER PUMP INDUCED PRESSURE.
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) | 1969-10-03 | 1970-04-04 | 1970-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-03 | 1974-04-04 | 1974-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-03 | 1978-04-04 | 1978-10-04 | $7700.00 | Window Closed / Lapsed |