US3198148A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metallurgical furnace roof
Assignee: Youngstown Sheet and Tube Co
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Filing: 1963-10-22
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Granted: 1965-08-03
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Expires: 1983-10-22
Abstract
No abstract record available.
Inventors
- 👤 Thomas A Hall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 02:44
CPC Classifications
F; F27; F27D; F27D1/00; F27D1/02; F27D1/021; F23; F23M; F23M5/00; F23M5/06
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
90 words
IN A BASIC REFRACTORY FURNACE ROOF COMPRISING A PLURALITY OF INDEPENDENTLY SUPPORTED METAL ENCASED BASIC REFRACTORY BRICKS AND SPACED HOLD-DOWN BEAMS EXTENDING LONGITUDINALLY OF THE ROOF, A PLURALITY OF RODS INTERPOSED BETWEEN SAID BEAMS AND THE COLD ENDS OF THE RESPECTIVELY SUBJACENT BRICKS, AND TABS PROJECTING FROM SAID BRICKS AND OVERLYING SAID RODS FOR SUPPORTING SAID SUBJACENT BRICKS THEREFROM, THE ENDS OF SAID RODS EXTENDING OUTWARDLY BEYOND THE EDGES OF SAID BRICKS AND INTO ENGAGEMENT WITH INDEPENDENTLY SUPPORTED BRICKS ALIGNED THEREWITH TO SUPPORT SAID RODS FROM SAID INDEPENDENTLY SUPPORTED BRICKS.
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) | 1968-08-02 | 1969-02-01 | 1969-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-02 | 1973-02-01 | 1973-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-02 | 1977-02-01 | 1977-08-03 | $7700.00 | Window Closed / Lapsed |