Patent US3246956A successfully refreshed from Google Patents.
US3246956A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reactor furnaces
Assignee: US Borax Inc
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Filing: 1962-05-10
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Granted: 1966-04-19
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Expires: 1982-05-10
Abstract
No abstract record available.
Inventors
- 👤 Wood Anthony Arthur Robinson
- 👤 Long Brian Philip
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:30
CPC Classifications
B; B01; B01J; B01J6/00; B01J16/00; B01J19/00; B01J19/0053; B01J19/0073; C; C01; C01B; C01B35/00; C01B35/02; C01B35/04; B01J2219/00; B01J2219/00049; B01J2219/00051; B01J2219/00074; B01J2219/00076; B01J2219/00085; B01J2219/00087; B01J2219/00094; B01J2219/00132; B01J2219/00135; B01J2219/0015; B01J2219/00155; Y; Y02; Y02P; Y02P20/00; Y02P20/141
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
133 words
A FURNACE COMPRISING AT LEAST TWO SUBSTANTIALLY HORIZONTAL HEATING CHAMBERS OF GENERALLY TUBULAR SHAPE, EACH CONSISTING OF END PORTIONS AND AN INTERMEDIATE PORTION, ONE OF SAID END PORTIONS OF EACH HEATING CHAMBER BEING PROVIDED WITH A FEED OPENING AND THE OTHER BEING PROVIDED WITH A DISCHARGE OPENING, A DISCHARGE CONDUIT EXTENDING DOWNWARDS FROM SAID HEATING CHAMBERS AND INTO WHICH THE DISCHARGE OPENING OF EACH OF THE HEATING CHAMBERS LEADS, DISCHARGE OPENING OF EACH OF THE HEATING CHAMBERS LEADS, A QUENCHING CHAMBER AT THE BOTTOM OF THE DISCHARGE CONDUIT AND, OUTSIDE EACH OF THE HEATING CHAMBERS, A GRAPHITE ELECTRICAL RESISTANCE HEATING ELEMENT OF GENERALLY TUBULAR SHAPE AND OF UNIFORM THICKNESS EXTENDING ALONG THE CHAMBER AT LEAST SUBSTANTIALLY UP TO THE DISCHARGE OPENING, SAID GRAPHITE ELECTRICAL RESISTANCE HEATING ELEMENTS BEING PROVIDED WITH TWO DIAMETRICALLY OPPOSED
Claim 2
Dependent Claim
133 words
A FURNACE COMPRISING AT LEAST TWO SUBSTANTIALLY HORIZONTAL HEATING CHAMBERS OF GENERALLY TUBULAR SHAPE, EACH CONSISTING OF END PORTIONS AND AN INTERMEDIATE PORTION, ONE OF SAID END PORTIONS OF EACH HEATING CHAMBER BEING PROVIDED WITH A FEED OPENING AND THE OTHER BEING PROVIDED WITH A DISCHARGE OPENING, A DISCHARGE CONDUIT EXTENDING DOWNWARDS FROM SAID HEATING CHAMBERS AND INTO WHICH THE DISCHARGE OPENING OF EACH OF THE HEATING CHAMBERS LEADS, DISCHARGE OPENING OF EACH OF THE HEATING CHAMBERS LEADS, A QUENCHING CHAMBER AT THE BOTTOM OF THE DISCHARGE CONDUIT AND, OUTSIDE EACH OF THE HEATING CHAMBERS, A GRAPHITE ELECTRICAL RESISTANCE HEATING ELEMENT OF GENERALLY TUBULAR SHAPE AND OF UNIFORM THICKNESS EXTENDING ALONG THE CHAMBER AT LEAST SUBSTANTIALLY UP TO THE DISCHARGE OPENING, SAID GRAPHITE ELECTRICAL RESISTANCE HEATING ELEMENTS BEING PROVIDED WITH TWO DIAMETRICALLY OPPOSED
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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) | 1969-04-18 | 1969-10-18 | 1970-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-18 | 1973-10-18 | 1974-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-18 | 1977-10-18 | 1978-04-19 | $7700.00 | Window Closed / Lapsed |