Patent US3196246A successfully refreshed from Google Patents.
US3196246A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means for observing a workpiece in electron beam machining apparatus
Assignee: RCA Corp
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Filing: 1962-11-29
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Granted: 1965-07-20
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Expires: 1982-11-29
Abstract
No abstract record available.
Inventors
- 👤 Auguste B El-Kareh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:34
CPC Classifications
H; H01; H01J; H01J37/00; H01J37/30; H01J37/302; B; B23; B23K; B23K15/00; B23K15/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
IN APPARATUS OF THE TYPE WHEREIN AN ELECTRON BEAM FROM AN ELECTRON GUN IS DIRECTED ONTO A WORKPIECE TO PERFORM A MACHINING OPERATION ON SAID WORKPIECE, THE COMBINATION THEREWITH OF (A) MEANS FOR BIASING SAID GUN TO DEVELOP A CURRENT INTENSITY FOR SAID BEAM PERIODICALLY SUFFICIENT TO PERFORM SAID MECHINING OPERATION, (B) MEANS FOR BIASING SAID GUN PERIODICALLY TO REDUCE THE CURRENT INTENSITY OF SAID BEAM SO THAT IT IS SUBSTANTIALLY INCAPABLE OF PERFORMING SAID MACHINING OPERATION BUT IS CAPABLE OF PRODUCING SECONDARY ELECTRONS AT SAID WORKPIECE, (C) MEANS TO SCAN SAID WORKPIECE WITH SAID BEAM OF
Claim 2
Dependent Claim
97 words
IN APPARATUS OF THE TYPE WHEREIN AN ELECTRON BEAM FROM AN ELECTRON GUN IS DIRECTED ONTO A WORKPIECE TO PERFORM A MACHINING OPERATION ON SAID WORKPIECE, THE COMBINATION THEREWITH OF (A) MEANS FOR BIASING SAID GUN TO DEVELOP A CURRENT INTENSITY FOR SAID BEAM PERIODICALLY SUFFICIENT TO PERFORM SAID MECHINING OPERATION, (B) MEANS FOR BIASING SAID GUN PERIODICALLY TO REDUCE THE CURRENT INTENSITY OF SAID BEAM SO THAT IT IS SUBSTANTIALLY INCAPABLE OF PERFORMING SAID MACHINING OPERATION BUT IS CAPABLE OF PRODUCING SECONDARY ELECTRONS AT SAID WORKPIECE, (C) MEANS TO SCAN SAID WORKPIECE WITH SAID BEAM OF
References Cited (Backward Citations)
US3103584A
Cited
US3016449A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-07-19 | 1969-01-18 | 1969-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-07-19 | 1973-01-18 | 1973-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-07-19 | 1977-01-18 | 1977-07-20 | $7700.00 | Window Closed / Lapsed |