US3343518A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High temperature furnace
Assignee: C I HAYES Inc
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Filing: 1964-09-30
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Granted: 1967-09-26
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Expires: 1984-09-30
Abstract
No abstract record available.
Inventors
- 👤 Herbert W Westeren
- 👤 William G Sefton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:16
CPC Classifications
C; C30; C30B; C30B31/00; C30B31/06; C30B31/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
175 words
IN A HIGH TEMPERATURE FURNACE, A HOUSING HAVING A HEATING CHAMBER LOCATED THEREIN, AN ELONGATED CONDUCTOR TUBE FORMED OF A QUARTZ MATERIAL EXTENDING THROUGH SAID HEATING CHAMBER AND RECEIVING ARTICLES FOR HEAT TREATMENT IN A CONFINED AREA THEREIN, A HEAT STORAGE TUBE LOCATED GENERALLY CENTRAL IN SAID HEATING CHAMBER AND DISPOSED IN ENVELOPING COAXIAL RELATION AROUND ONLY A PORTION OF SAID CONDUCTOR TUBE SO AS TO BE SUBSTANTIALLY SPACED FROM THE ENDS OF SAID HEATING CHAMBER TO DEFINE A CONFINED HEAT CONTROL ZONE AT THE ENVELOPED PORTION OF SAID CONDUCTOR TUBE, WHEREIN SAID ENVELOPED CONDUCTOR TUBE PORTION AND THE ARTICLES LOCATED THEREIN ARE MAINTAINED AT A PREDETERMINED TEMPERATURE, A PLURALITY OF ELONGATED HEATING ELEMENTS PROJECTING THROUGH SAID HEATING CHAMBER IN SPACED RELATION FROM SID CONDUCTOR TUBE FOR SUPPLYING THE REQUIRED HEAT FOR HEATING SAID HEAT STORAGE TO THE PREDETERMINED TEMPERATURE, AND AUXILIARY HEATING ELEMENTS LOCATED IN SAID HEATING CHAMBER ADJACENT TO THE ENDS OF SAID HEAT STORAGE TUBE AND COOPERATING WITH SAID ELONGATED HEATING ELEMENTS TO HEAT SAID STORAGE TUBE TO A REQUIRED TEMPERATURE LEVEL.
Claim 2
Dependent Claim
175 words
IN A HIGH TEMPERATURE FURNACE, A HOUSING HAVING A HEATING CHAMBER LOCATED THEREIN, AN ELONGATED CONDUCTOR TUBE FORMED OF A QUARTZ MATERIAL EXTENDING THROUGH SAID HEATING CHAMBER AND RECEIVING ARTICLES FOR HEAT TREATMENT IN A CONFINED AREA THEREIN, A HEAT STORAGE TUBE LOCATED GENERALLY CENTRAL IN SAID HEATING CHAMBER AND DISPOSED IN ENVELOPING COAXIAL RELATION AROUND ONLY A PORTION OF SAID CONDUCTOR TUBE SO AS TO BE SUBSTANTIALLY SPACED FROM THE ENDS OF SAID HEATING CHAMBER TO DEFINE A CONFINED HEAT CONTROL ZONE AT THE ENVELOPED PORTION OF SAID CONDUCTOR TUBE, WHEREIN SAID ENVELOPED CONDUCTOR TUBE PORTION AND THE ARTICLES LOCATED THEREIN ARE MAINTAINED AT A PREDETERMINED TEMPERATURE, A PLURALITY OF ELONGATED HEATING ELEMENTS PROJECTING THROUGH SAID HEATING CHAMBER IN SPACED RELATION FROM SID CONDUCTOR TUBE FOR SUPPLYING THE REQUIRED HEAT FOR HEATING SAID HEAT STORAGE TO THE PREDETERMINED TEMPERATURE, AND AUXILIARY HEATING ELEMENTS LOCATED IN SAID HEATING CHAMBER ADJACENT TO THE ENDS OF SAID HEAT STORAGE TUBE AND COOPERATING WITH SAID ELONGATED HEATING ELEMENTS TO HEAT SAID STORAGE TUBE TO A REQUIRED TEMPERATURE LEVEL.
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) | 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 |