US3185461A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Furnace construction
Assignee: National Steel Corp
•
Filing: 1963-08-01
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Granted: 1965-05-25
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Expires: 1983-08-01
Abstract
No abstract record available.
Inventors
- 👤 Lucien A Fugassi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 03:44
CPC Classifications
C; C21; C21D; C21D1/00; C21D1/74
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
158 words
AN ANNEALING FURNACE COMPRISING A BASE; A FRAMEWORK HAVING WALLS AND ROOF OF REFRACTORY CERAMIC MATERIAL, SAID FRAMEWORK BEING SUPPORTABLE BY SAID BASE; ELONGATED GUIDE MEANS VERTICAL TO SAID BASE AND IN SLIDING RELATIONSHIP WITH SAID FRAMEWORK TO ENABLE SAID FRAMEWORK TO BE RAISED AND LOWERED; COVER MEANS HAVING A VERTICALLY ELONGATED SIDE AND BEING WITHIN SAID FRAMEWORK AND SUPPORTABLE BY SAID BASE, SAID COVER MEANS BEING IMPERFORATE WHEREBY MATERIAL WITHIN SAID COVER MEANS IS ISOLATED FROM COMBUSTION GASES IN THE FURNACE; A MULTIPERFORATE WALL PORTION CONTIGUOUS AND SUBSTANTIALLY COEXTENSIVE IN AREA WITH SAID SIDE OF SAID COVER MEANS; MEANS FOR CATALYTICALLY BURNING GASES, SAID MEANS BEING METALLIC WIRE SCREENING, SAID SCREENING BEING CONTIGUOUS TO AND SUBSTANTIALLY COEXTENSIVE IN AREA WITH SAID COVER MEANS AND SAID MULTIPERFORATE WALL PORTION, SAID SCREENING BEING DISPOSED BETWEEN SAID COVER MEANS AND SAID WALL PORTION; AND MEANS FOR FEEDING A GASEOUS FUEL THROUGH THE MULTIPERFORATE WALL PORTION ONTO THE METALLIC WIRE SCREENING.
Claim 2
Dependent Claim
158 words
AN ANNEALING FURNACE COMPRISING A BASE; A FRAMEWORK HAVING WALLS AND ROOF OF REFRACTORY CERAMIC MATERIAL, SAID FRAMEWORK BEING SUPPORTABLE BY SAID BASE; ELONGATED GUIDE MEANS VERTICAL TO SAID BASE AND IN SLIDING RELATIONSHIP WITH SAID FRAMEWORK TO ENABLE SAID FRAMEWORK TO BE RAISED AND LOWERED; COVER MEANS HAVING A VERTICALLY ELONGATED SIDE AND BEING WITHIN SAID FRAMEWORK AND SUPPORTABLE BY SAID BASE, SAID COVER MEANS BEING IMPERFORATE WHEREBY MATERIAL WITHIN SAID COVER MEANS IS ISOLATED FROM COMBUSTION GASES IN THE FURNACE; A MULTIPERFORATE WALL PORTION CONTIGUOUS AND SUBSTANTIALLY COEXTENSIVE IN AREA WITH SAID SIDE OF SAID COVER MEANS; MEANS FOR CATALYTICALLY BURNING GASES, SAID MEANS BEING METALLIC WIRE SCREENING, SAID SCREENING BEING CONTIGUOUS TO AND SUBSTANTIALLY COEXTENSIVE IN AREA WITH SAID COVER MEANS AND SAID MULTIPERFORATE WALL PORTION, SAID SCREENING BEING DISPOSED BETWEEN SAID COVER MEANS AND SAID WALL PORTION; AND MEANS FOR FEEDING A GASEOUS FUEL THROUGH THE MULTIPERFORATE WALL PORTION ONTO THE METALLIC WIRE SCREENING.
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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) | 1968-05-24 | 1968-11-23 | 1969-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-05-24 | 1972-11-23 | 1973-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-05-24 | 1976-11-23 | 1977-05-25 | $7700.00 | Window Closed / Lapsed |