Patent US4866934A successfully refreshed from Google Patents.
Patent US2576169A successfully refreshed from Google Patents.
US2576169A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat treatment of strip metals
Assignee: SAMUEL FOX AND Co Ltd
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Filing: 1948-07-27
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Granted: 1951-11-27
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Expires: 1968-07-27
Abstract
No abstract record available.
Inventors
- 👤 Ashton George Walker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:01
CPC Classifications
C; C21; C21D; C21D9/00; C21D9/0043; C21D9/52; C21D9/54; C21D9/56; C21D9/561
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
AN APPARATUS FOR HEAT TREATMENT OF CONTINUOUS LENGTHS OF METAL, COMPRISING A FURNACE INCLUDING A HEATING CHAMBER, A TUBE-SHAPED SUBSTANTIALLY GAS TIGHT MUFFLE DISPOSED WITHIN THE FURNACE CHAMBER, SAID FURNACE AND MUFFLE HAVING AN INLET AND A DISCHARGE OPENING RESPECTIVELY FOR PASSING SAID LENGTHS OF METAL THROUGH THE MUFFLE, SAID MUFFLE BEING MADE OF A METAL SUBSTANTIALLY SEMI-PLASTIC AT THE OPERATING TEMPERATURE OF THE APPARATUS, INTERNAL SUPPORT MEANS DISPOSED WITHIN THE MUFFLE INDEPENDENTLY THEREFROM FOR SUPPORTING THE MUFFLE AGAINST SAGGING, SAID SUPPORT MEANS BEING MADE OF A MATERIAL REMAINING SUBSTANTIALLY RIGID AT SAID OPERATING TEMPERATURE, EXTERNAL SUPPORT MEANS DISPOSED OUTSIDE THE MUFFLE INDEPENDENTLY THEREFROM FOR SUPPORTING THE MUFFLE, SAID EXTERNAL SUPPORT MEANS BEING ARRANGED TO PROVIDE FOR LONGITU-
Claim 2
Independent Claim
118 words
AN APPARATUS FOR HEAT TREATMENT OF CONTINUOUS LENGTHS OF METAL, COMPRISING A FURNACE INCLUDING A HEATING CHAMBER, A TUBE-SHAPED SUBSTANTIALLY GAS TIGHT MUFFLE DISPOSED WITHIN THE FURNACE CHAMBER, SAID FURNACE AND MUFFLE HAVING AN INLET AND A DISCHARGE OPENING RESPECTIVELY FOR PASSING SAID LENGTHS OF METAL THROUGH THE MUFFLE, SAID MUFFLE BEING MADE OF A METAL SUBSTANTIALLY SEMI-PLASTIC AT THE OPERATING TEMPERATURE OF THE APPARATUS, INTERNAL SUPPORT MEANS DISPOSED WITHIN THE MUFFLE INDEPENDENTLY THEREFROM FOR SUPPORTING THE MUFFLE AGAINST SAGGING, SAID SUPPORT MEANS BEING MADE OF A MATERIAL REMAINING SUBSTANTIALLY RIGID AT SAID OPERATING TEMPERATURE, EXTERNAL SUPPORT MEANS DISPOSED OUTSIDE THE MUFFLE INDEPENDENTLY THEREFROM FOR SUPPORTING THE MUFFLE, SAID EXTERNAL SUPPORT MEANS BEING ARRANGED TO PROVIDE FOR LONGITU-
References Cited (Backward Citations)
US499015A
Cited
US514698A
Cited
US833640A
Cited
US1445220A
Cited
US2033331A
Cited
US2103234A
Cited
US2098999A
Cited
US2109930A
Cited
US2210032A
Cited
US2290552A
Cited
US2468456A
Cited
US2421482A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-11-26 | 1955-05-28 | 1955-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-11-26 | 1959-05-28 | 1959-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-11-26 | 1963-05-28 | 1963-11-27 | $7700.00 | Window Closed / Lapsed |