US3318591A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Batch type rotary barrel gas atmosphere furnace
Assignee: Holcroft and Co
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Filing: 1964-09-28
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Granted: 1967-05-09
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Expires: 1984-09-28
Abstract
No abstract record available.
Inventors
- 👤 Walter H Holcroft
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:12
CPC Classifications
C; C21; C21D; C21D9/00; C21D9/0031
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
IN AN APPARATUS FOR HEAT TREATING PARTS IN A CONTROLLED ATMOSPHERE, THE COMBINATION OF A SUBSTANTIALLY GAS TIGHT HEATING CHAMBER HAVING ENCLOSING WALLS INCLUDING OPPOSITE END WALLS DEFINING THE LENGTHWISE EXTENT OF SAID CHAMBER, A CYLINDRICAL RETORT OF A LENGTH LESS THAN THE DISTANCE BETWEEN SAID END WALLS LOCATED AND SUPPORTED ENTIRELY WITHIN SAID CHAMBER, ROLLERS BENEATH SAID CYLINDRICAL RETORT FOR ROTATABLY SUPPORTING THE SAME, SID ROLLERS HAVING MEANS FOR ROLLING SUPPORTING CONTACT FOR SUBSTANTIALLY THE ENTIRE LENGTH OF SAID CYLINDRICAL RETORT FIRST MEANS FOR ROTATING SAID ROLLERS TO THEREBY FRICTIONALLY DRIVE SAID RETORT, AND INDEPENDENT SECOND MEANS INDEPENDENT OF SAID ROTATING ROLLERS FOR DRIVING SAID RETORT IN RORATION UPON SLIPPAGE OCCURRING BETWEEN SAID RETORT AND SAID FIRST MEANS.
Claim 2
Dependent Claim
119 words
IN AN APPARATUS FOR HEAT TREATING PARTS IN A CONTROLLED ATMOSPHERE, THE COMBINATION OF A SUBSTANTIALLY GAS TIGHT HEATING CHAMBER HAVING ENCLOSING WALLS INCLUDING OPPOSITE END WALLS DEFINING THE LENGTHWISE EXTENT OF SAID CHAMBER, A CYLINDRICAL RETORT OF A LENGTH LESS THAN THE DISTANCE BETWEEN SAID END WALLS LOCATED AND SUPPORTED ENTIRELY WITHIN SAID CHAMBER, ROLLERS BENEATH SAID CYLINDRICAL RETORT FOR ROTATABLY SUPPORTING THE SAME, SID ROLLERS HAVING MEANS FOR ROLLING SUPPORTING CONTACT FOR SUBSTANTIALLY THE ENTIRE LENGTH OF SAID CYLINDRICAL RETORT FIRST MEANS FOR ROTATING SAID ROLLERS TO THEREBY FRICTIONALLY DRIVE SAID RETORT, AND INDEPENDENT SECOND MEANS INDEPENDENT OF SAID ROTATING ROLLERS FOR DRIVING SAID RETORT IN RORATION UPON SLIPPAGE OCCURRING BETWEEN SAID RETORT AND SAID FIRST MEANS.
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) | 1970-05-08 | 1970-11-07 | 1971-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-08 | 1974-11-07 | 1975-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-08 | 1978-11-07 | 1979-05-09 | $7700.00 | Window Closed / Lapsed |