Patent US2713480A successfully refreshed from Google Patents.
US2713480A
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US
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Heat treating apparatus
Assignee: Individual
•
Filing: 1950-08-14
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Granted: 1955-07-19
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Expires: 1970-08-14
Abstract
No abstract record available.
Inventors
- 👤 Ruckstahl Alfred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:30
CPC Classifications
C; C21; C21D; C21D9/00; C21D9/0062; C21D1/00; C21D1/62; C21D1/63; C23; C23C; C23C8/00; C23C8/06
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
129 words
HEAT TREATING APPARATUS COMPRISING A FURNACE HAVING A HORIZONTALLY DISPOSED TUNNEL PROVIDED WITH CHARGE AND DISCHARGE OPENINGS AT ITS OPPOSITE ENDS TO PERMIT PASSING AN ARTICLE RECEIVING TRAY THERETHROUGH AND HAVING MEANS FOR HEATING THE INTERIOR OF SAID TUNNEL, DOORS FOR THE CHARGE AND DISCHARGE OPENINGS BEING SUPPORTED FOR MOVEMENT BETWEEN OPEN AND CLOSED POSITIONS, MEANS FOR ADVANCING THE TRAY THROUGH SAID TUNNEL COMPRISING A FIRST GROUP OF ROLLS, A SECOND GROUP OF ROLLS LOCATED ADJACENT AND DISCHARGE OPENING OF SAID TUNNEL EXTERIORLY THEREOF, ALL OF SAID ROLLS EXTENDING TRANSVERSELY OF SAID TUNNEL AND SPACED APART LONGITUDINALLY THEREOF, MEANS FORMING A TREATING ZONE LOCATED BENEATH SAID SECOND GROUP OF ROLLS, MEANS SUPPORTING SAID SECOND GROUP OF ROLLS FOR VERTICAL MOVEMENT AS A UNIT INTO AND OUT OF SAID TREAT-
References Cited (Backward Citations)
US1460066A
Cited
US786365A
Cited
US890251A
Cited
US1226266A
Cited
US1462899A
Cited
US1762067A
Cited
US2033331A
Cited
US2091172A
Cited
US2244768A
Cited
US2338784A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-07-18 | 1959-01-17 | 1959-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-07-18 | 1963-01-17 | 1963-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-07-18 | 1967-01-17 | 1967-07-19 | $7700.00 | Window Closed / Lapsed |