US3343828A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High vacuum furnace
Assignee: Airco Inc
•
Filing: 1962-03-30
•
Granted: 1967-09-26
•
Expires: 1982-03-30
Abstract
No abstract record available.
Inventors
- 👤 Charles D A Hunt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:54
CPC Classifications
H; H01; H01J; H01J37/00; H01J37/30; H01J37/305; C; C22; C22B; C22B9/00; C22B9/16; C22B9/22; C22B9/228; F; F27; F27B; F27B5/00; F27B5/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
153 words
A HIGH VACUUM FURNACE FOR THE PRODUCTION OF HIGHLY PURIFIED METAL COMPRISING AN ENCLOSURE, AN ELONGATED HORIZONTALLY DISPOSED HEARTH WITHIN SAID ENCLOSURE FOR RECEIVING MOLTEN METAL AND FOR FORMING A MOLTEN POOL THEREOF, SAID ENCLOSURE HAVING A TRANSVERSE WALL THEREIN INTERMEDIATE THE ENDS OF SAID HEARTH WHICH FORMS WITH THE WALLS OF SAID ENCLOSURE, SAID HEARTH, AND THE MOLTEN POOL OF METAL IN SAID HEARTH A PRESSURE BARRIER THEREBY DIVIDING SAID ENCLOSURE INTO A FIRST PRESSURE CHAMBER AND A SECOND PRESSURE CHAMBER, SAID TRANSVERSE WALL IN THE REGION WITHIN SAID HEARTH TERMINATING AT A POINT SPACED ABOVE THE BOTTOM OF SAID HEARTH AND ADJACENT THE SURFACE OF THE MOLTEN POOL THEREBY DEFINING AN OPENING FOR PASSAGE OF MOLTEN METAL FROM SAID FIRST CHAMBER INTO SAID SECOND CHAMBER, FIRST ELECTRON BEAM GENERATING MEANS FOR HEATING RAW MATERIALS ABOVE THEIR MELTING POINT IN SAID FIRST CHAMBER AND FOR MAINTAINING A MOLTEN POOL OF METAL IN
Claim 2
Dependent Claim
153 words
A HIGH VACUUM FURNACE FOR THE PRODUCTION OF HIGHLY PURIFIED METAL COMPRISING AN ENCLOSURE, AN ELONGATED HORIZONTALLY DISPOSED HEARTH WITHIN SAID ENCLOSURE FOR RECEIVING MOLTEN METAL AND FOR FORMING A MOLTEN POOL THEREOF, SAID ENCLOSURE HAVING A TRANSVERSE WALL THEREIN INTERMEDIATE THE ENDS OF SAID HEARTH WHICH FORMS WITH THE WALLS OF SAID ENCLOSURE, SAID HEARTH, AND THE MOLTEN POOL OF METAL IN SAID HEARTH A PRESSURE BARRIER THEREBY DIVIDING SAID ENCLOSURE INTO A FIRST PRESSURE CHAMBER AND A SECOND PRESSURE CHAMBER, SAID TRANSVERSE WALL IN THE REGION WITHIN SAID HEARTH TERMINATING AT A POINT SPACED ABOVE THE BOTTOM OF SAID HEARTH AND ADJACENT THE SURFACE OF THE MOLTEN POOL THEREBY DEFINING AN OPENING FOR PASSAGE OF MOLTEN METAL FROM SAID FIRST CHAMBER INTO SAID SECOND CHAMBER, FIRST ELECTRON BEAM GENERATING MEANS FOR HEATING RAW MATERIALS ABOVE THEIR MELTING POINT IN SAID FIRST CHAMBER AND FOR MAINTAINING A MOLTEN POOL OF METAL IN
References Cited (Backward Citations)
US2734244A
Cited
US2798108A
Cited
US2023483A
Cited
US2140607A
Cited
FR1129402A
Cited
US2899556A
Cited
US2745891A
Cited
US2840463A
Cited
US2789152A
Cited
US2932588A
Cited
US2824232A
Cited
US2963530A
Cited
US2997760A
Cited
US3020387A
Cited
US2994801A
Cited
US3068309A
Cited
US3132198A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-09-25 | 1971-03-27 | 1971-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-25 | 1975-03-27 | 1975-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-25 | 1979-03-27 | 1979-09-26 | $7700.00 | Window Closed / Lapsed |