US3139866A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Studded tube construction with studs of alcr
Assignee: Babcock International Ltd
•
Filing: 1959-05-04
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Granted: 1964-07-07
•
Expires: 1979-05-04
Abstract
No abstract record available.
Inventors
- 👤 Lumm Gunther
- 👤 Jahn Eduard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:16
CPC Classifications
F; F22; F22B; F22B37/00; F22B37/02; F22B37/10; F22B37/101; F22B37/102; F23; F23M; F23M5/00; F23M5/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
IN A FURNACE FOR BURNING A SLAG-FRMING SOLID FUEL UNDER FURNACE TEMPERATURES ABOVE THE FUEL ASH FUSION TEMPERATURE AND EVOLVING CORROSIVE FURNACE GASES CONTAINING H2S, A FURNACE WALL COOLING TUBE OF CARBON STEEL HAVING METALLIC STUDS WELDED AT SPACED POINTS ON THE FURNACE SIDE OF SAID TUBE, SAID STUDS BEING FOMRED OF A LOW ALLOY CORROSION-RESISTANT STEEL HAVING CHROMIUM AND ALUMINUM AS MAJOR ALLOYING INGREDIENTS AND THE BALANCE SUBSTANTIALLY ALL IRON, AND A LAYER OF REFRACTORY MATERIAL RESISTANT TO THE REDUCING ACTION OF H2S ARRANGED TO LINE TH FURNACE SIDE OF SAID TUBE AND OF A THICKNESS SUFFICIENT TO COVER SUBSTANTIALLY ALL OF THE LENGTH OF SAID STUDS.
Claim 2
Dependent Claim
108 words
IN A FURNACE FOR BURNING A SLAG-FRMING SOLID FUEL UNDER FURNACE TEMPERATURES ABOVE THE FUEL ASH FUSION TEMPERATURE AND EVOLVING CORROSIVE FURNACE GASES CONTAINING H2S, A FURNACE WALL COOLING TUBE OF CARBON STEEL HAVING METALLIC STUDS WELDED AT SPACED POINTS ON THE FURNACE SIDE OF SAID TUBE, SAID STUDS BEING FOMRED OF A LOW ALLOY CORROSION-RESISTANT STEEL HAVING CHROMIUM AND ALUMINUM AS MAJOR ALLOYING INGREDIENTS AND THE BALANCE SUBSTANTIALLY ALL IRON, AND A LAYER OF REFRACTORY MATERIAL RESISTANT TO THE REDUCING ACTION OF H2S ARRANGED TO LINE TH FURNACE SIDE OF SAID TUBE AND OF A THICKNESS SUFFICIENT TO COVER SUBSTANTIALLY ALL OF THE LENGTH OF SAID STUDS.
References Cited (Backward Citations)
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Cited
US1850953A
Cited
US1706130A
Cited
US2077410A
Cited
US2093686A
Cited
GB557853A
Cited
US2588421A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-07-07 | 1968-01-06 | 1968-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-07 | 1972-01-06 | 1972-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-07 | 1976-01-06 | 1976-07-07 | $7700.00 | Window Closed / Lapsed |