US3198929A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric control apparatus for zone melting of semiconductor rods
Assignee: Siemens Schuckertwerke AG
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Filing: 1962-12-06
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Granted: 1965-08-03
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Expires: 1982-12-06
Abstract
No abstract record available.
Inventors
- 👤 Stut Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:23
CPC Classifications
G; G05; G05B; G05B19/00; G05B19/02; G05B19/04; G05B19/08; C; C30; C30B; C30B13/00; C30B13/28; C30B13/30; G05B2219/00; G05B2219/20; G05B2219/23; G05B2219/23199; G05B2219/25; G05B2219/25475; Y; Y10; Y10T; Y10T117/00; Y10T117/10; Y10T117/1024; Y10T117/1032; Y10T117/1068; Y10T117/1072; Y10T117/1076; Y10T117/1088
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
149 words
ELECTRIC CONTROL APPARATUS FOR FLOATING-ZONE MELTING OF SEMICONDUCTOR RODS, COMPRISING TWO COAXIAL ROD-END HOLDERS JOINTLY DEFINING A ROD AXIS, AN ELECTRIC HEATING DEVICE MOVABLE ALONG SAID AXIS FOR PRODUCING A MOLTEN ZONE IN THE ROD BEING PROCESSED, HOLDER DISPLACING MEANS FOR AXIALLY DISPLACING ONE OF SAID HOLDERS RELATIVE TO THE OTHER TO VARY THE CROSS SECTION OF THE MOLTEN ZONE, ELECTRIC POWER SUPPLY MEANS CONNECTED TO SAID DEVICE AND BEING CONTROLLABLE FOR VARYING THE HEATING ENERGY TRANSMITTED TO THE ROD BEING PROCESSED, A DIGITAL CONTROL SYSTEM CONNECTED TO SAID DISPLACING MEANS AND SAID POWER SUPPLY MEANS FOR CONJOINTLY CONTROLLING SAID CROSS SECTION AND SAID HEATING POWER IN DEPENDENCE UPON THE TRAVEL OF SAID HEATING DEVICE ALONG THE ROD AXIS, SAID CONTROL SYSTEM HAVING COUNTING-PULSE TRANSMITTER MEANS IN OPERATIVE CONNECTION WITH SAID HEATING DEVICE FOR ISSUING A GIVEN NUMBER OF PULSES FOR GIVEN TRAVEL STEPS OF SAID DEVICE, AND SAID
Claim 2
Dependent Claim
149 words
ELECTRIC CONTROL APPARATUS FOR FLOATING-ZONE MELTING OF SEMICONDUCTOR RODS, COMPRISING TWO COAXIAL ROD-END HOLDERS JOINTLY DEFINING A ROD AXIS, AN ELECTRIC HEATING DEVICE MOVABLE ALONG SAID AXIS FOR PRODUCING A MOLTEN ZONE IN THE ROD BEING PROCESSED, HOLDER DISPLACING MEANS FOR AXIALLY DISPLACING ONE OF SAID HOLDERS RELATIVE TO THE OTHER TO VARY THE CROSS SECTION OF THE MOLTEN ZONE, ELECTRIC POWER SUPPLY MEANS CONNECTED TO SAID DEVICE AND BEING CONTROLLABLE FOR VARYING THE HEATING ENERGY TRANSMITTED TO THE ROD BEING PROCESSED, A DIGITAL CONTROL SYSTEM CONNECTED TO SAID DISPLACING MEANS AND SAID POWER SUPPLY MEANS FOR CONJOINTLY CONTROLLING SAID CROSS SECTION AND SAID HEATING POWER IN DEPENDENCE UPON THE TRAVEL OF SAID HEATING DEVICE ALONG THE ROD AXIS, SAID CONTROL SYSTEM HAVING COUNTING-PULSE TRANSMITTER MEANS IN OPERATIVE CONNECTION WITH SAID HEATING DEVICE FOR ISSUING A GIVEN NUMBER OF PULSES FOR GIVEN TRAVEL STEPS OF SAID DEVICE, AND SAID
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) | 1968-08-02 | 1969-02-01 | 1969-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-02 | 1973-02-01 | 1973-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-02 | 1977-02-01 | 1977-08-03 | $7700.00 | Window Closed / Lapsed |