Patent US3140743A successfully refreshed from Google Patents.
US3140743A
Expired / Lapsed
US
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Heat treating apparatus
Assignee: Midland Ross Corp
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Filing: 1963-02-01
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Granted: 1964-07-14
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Expires: 1983-02-01
Abstract
No abstract record available.
Inventors
- 👤 Cone Carroll
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:11
CPC Classifications
C; C21; C21D; C21D9/00; C21D9/52; C21D9/54; C21D9/663
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
130 words
HEAT TREATING APPARATUS COMPRISING, IN COMBINATION: A FURNACE BASE COMPRISING A LOWER BASE PLATE AND AN APERTURED UPPER BASE PLATE SPACED ABOVE THE LOWER BASE PLATE AND FORMING AN ATMOSPHERE CIRCULATING SPACE THEREABOVE; AN INNER COVER DISPOSED OVER THE BASE AND FORMING A TREATING CHAMBER THEREWITH; A FAN EXTENDING UPWARDLY THROUGH THE BASE INTO THE CHAMBER AND HAVING AN IMPELLER WITH A BLADED PORTION GENERALLY AXIALLY ALIGNED WITH THE APERTURE OF THE UPPER BASE PLATE AND GENERALLY HORIZONTALLY ALIGNED WITH SAID SPACE FOR CIRCULATING ATMOSPHERE WITHIN THE TREATING CHAMBER IN A CIRCUIT FROM THE PORTION OF THE TREATING CHAMBER ABOVE THE UPPER BASE PLATE THROUGH THE APERTURE TO THE ATMOSPHERE CIRCULATING SPACE AND THENCE GENERALLY RADIALLY OUTWARDLY THROUGH SAID SPACE AND BACK TO SAID PORTION OF THE TREATING CHAMBER; AN
Claim 2
Dependent Claim
130 words
HEAT TREATING APPARATUS COMPRISING, IN COMBINATION: A FURNACE BASE COMPRISING A LOWER BASE PLATE AND AN APERTURED UPPER BASE PLATE SPACED ABOVE THE LOWER BASE PLATE AND FORMING AN ATMOSPHERE CIRCULATING SPACE THEREABOVE; AN INNER COVER DISPOSED OVER THE BASE AND FORMING A TREATING CHAMBER THEREWITH; A FAN EXTENDING UPWARDLY THROUGH THE BASE INTO THE CHAMBER AND HAVING AN IMPELLER WITH A BLADED PORTION GENERALLY AXIALLY ALIGNED WITH THE APERTURE OF THE UPPER BASE PLATE AND GENERALLY HORIZONTALLY ALIGNED WITH SAID SPACE FOR CIRCULATING ATMOSPHERE WITHIN THE TREATING CHAMBER IN A CIRCUIT FROM THE PORTION OF THE TREATING CHAMBER ABOVE THE UPPER BASE PLATE THROUGH THE APERTURE TO THE ATMOSPHERE CIRCULATING SPACE AND THENCE GENERALLY RADIALLY OUTWARDLY THROUGH SAID SPACE AND BACK TO SAID PORTION OF THE TREATING CHAMBER; AN
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) | 1967-07-14 | 1968-01-13 | 1968-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-14 | 1972-01-13 | 1972-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-14 | 1976-01-13 | 1976-07-14 | $7700.00 | Window Closed / Lapsed |