Patent US3299196A successfully refreshed from Google Patents.
US3299196A
Expired / Lapsed
US
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Diffusion furnace
Assignee: Electroglas Inc
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Filing: 1964-07-13
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Granted: 1967-01-17
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Expires: 1984-07-13
Abstract
No abstract record available.
Inventors
- 👤 Jr Cecil A Lasch
- 👤 Gordon P Hampton
- 👤 Boris J Speransky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:10
CPC Classifications
F; F27; F27D; F27D11/00; F27D11/02; H; H05; H05B; H05B3/00; H05B3/0019
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
IN A DIFFUSION FURNACE, A SUBSTANTIALLY HOLLOW PROCESSING MEMBER HAVING A PROCESSING ZONE THEREIN, A HEATING ELEMENT SURROUNDING SAID PROCESSING MEMBER AND SUPPLYING HEAT TO SAID PROCESSING ZONE, SAID PROCESSING MEMBER BEING SUBSTANTIALLY TRANSPARENT TO RADIATION FROM THE HEATING ELEMENT, A PLURALITY OF THERMOCOUPLES, MEANS FOR SUPPORTING SAID THERMOCOUPLES IN POSITIONS ADJACENT TO THE PROCESSING ZONE AND WITHIN THE HEATING ELEMENT, SAID MEANS FOR SUPPORTING SAID PLURALITY OF THERMOCOUPLES BEING SUBSTANTIALLY TRANSPARENT TO RADIATION FROM THE HEATING ELEMENT, SAID THERMOCOUPLES BEING SPACED APART LONGITUDINALLY OF THE PROCESSING MEMBER, AND CONTROL MEANS CONNECTED TO THE THERMOCOUPLES FOR CONTROLLING THE HEAT SUPPLIED TO THE HEATING ELEMENT IN ACCORDANCE WITH THE TEMPERATURE SENSED BY THE THERMOCOUPLES.
Claim 2
Dependent Claim
113 words
IN A DIFFUSION FURNACE, A SUBSTANTIALLY HOLLOW PROCESSING MEMBER HAVING A PROCESSING ZONE THEREIN, A HEATING ELEMENT SURROUNDING SAID PROCESSING MEMBER AND SUPPLYING HEAT TO SAID PROCESSING ZONE, SAID PROCESSING MEMBER BEING SUBSTANTIALLY TRANSPARENT TO RADIATION FROM THE HEATING ELEMENT, A PLURALITY OF THERMOCOUPLES, MEANS FOR SUPPORTING SAID THERMOCOUPLES IN POSITIONS ADJACENT TO THE PROCESSING ZONE AND WITHIN THE HEATING ELEMENT, SAID MEANS FOR SUPPORTING SAID PLURALITY OF THERMOCOUPLES BEING SUBSTANTIALLY TRANSPARENT TO RADIATION FROM THE HEATING ELEMENT, SAID THERMOCOUPLES BEING SPACED APART LONGITUDINALLY OF THE PROCESSING MEMBER, AND CONTROL MEANS CONNECTED TO THE THERMOCOUPLES FOR CONTROLLING THE HEAT SUPPLIED TO THE HEATING ELEMENT IN ACCORDANCE WITH THE TEMPERATURE SENSED BY THE THERMOCOUPLES.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-16 | 1970-07-18 | 1971-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-16 | 1974-07-18 | 1975-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-16 | 1978-07-18 | 1979-01-17 | $7700.00 | Window Closed / Lapsed |