US3337676A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electron beam melting apparatus
Assignee: Wah Chang Corp
•
Filing: 1964-04-02
•
Granted: 1967-08-22
•
Expires: 1984-04-02
Abstract
No abstract record available.
Inventors
- 👤 Stephen W H Yih
- 👤 Royal H Dimick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 05:19
CPC Classifications
H; H01; H01J; H01J37/00; H01J37/30; H01J37/305; H01J37/02; H01J37/04; H01J37/06; H01J37/077; H01J37/3002; H01J37/3007
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
ELECTRON BEAM MELTING APPARATUS, COMPRISING (A) A HOUSING ADAPTED TO BE EVACUATED TO SUB-ATMOSPHERIC PRESSURE AND ARRANGED TO CONTAIN A MATERIAL TO BE MELTED, THE HOUSING INCLUDING A RECEPTACLE FOR RECEIVING THE MELTED MATERIAL, (B) CONDUIT MEANS COMMUNICATING THE HOUSING WITH A SOURCE OF INERT GAS, (C) ELECTRIC ARC DISCHARGE MEANS IN THE HOUSING REMOTE FROM AND INDEPENDENT OF THE RECEPTACLE AND MELTED MATERIAL THEREIN FOR PROVIDING AN ELECTRIC DISCHARGE ARC IN THE PATH OF INERT GAS EMITTED FROM THE CONDUIT MEANS WHEREBY TO EFFECT IONIZATION OF THE INERT GAS AND CONSEQUENT PRODUCTION OF ELECTRONS, AND
Claim 2
Dependent Claim
96 words
ELECTRON BEAM MELTING APPARATUS, COMPRISING (A) A HOUSING ADAPTED TO BE EVACUATED TO SUB-ATMOSPHERIC PRESSURE AND ARRANGED TO CONTAIN A MATERIAL TO BE MELTED, THE HOUSING INCLUDING A RECEPTACLE FOR RECEIVING THE MELTED MATERIAL, (B) CONDUIT MEANS COMMUNICATING THE HOUSING WITH A SOURCE OF INERT GAS, (C) ELECTRIC ARC DISCHARGE MEANS IN THE HOUSING REMOTE FROM AND INDEPENDENT OF THE RECEPTACLE AND MELTED MATERIAL THEREIN FOR PROVIDING AN ELECTRIC DISCHARGE ARC IN THE PATH OF INERT GAS EMITTED FROM THE CONDUIT MEANS WHEREBY TO EFFECT IONIZATION OF THE INERT GAS AND CONSEQUENT PRODUCTION OF ELECTRONS, AND
References Cited (Backward Citations)
US2934665A
Cited
US3015745A
Cited
US3210454A
Cited
US3218431A
Cited
US3294954A
Cited
US3271556A
Cited
US3275787A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-08-21 | 1971-02-20 | 1971-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-21 | 1975-02-20 | 1975-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-21 | 1979-02-20 | 1979-08-22 | $7700.00 | Window Closed / Lapsed |