US2801099A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Monolithic liner and method of construction
Assignee: United States Steel Corp
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Filing: 1954-04-14
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Granted: 1957-07-30
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Expires: 1974-04-14
Abstract
No abstract record available.
Inventors
- 👤 Ernest D Larson
- 👤 Howard H Nichols
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:48
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/45; C04B41/52
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
79 words
A MONOLITHIC LINER FOR A BOTTOM FIRED SOAKING PIT BURNER PORT COMPRISING AND ANNULAR BODY OF CASTABLE SILICEOUS ACID REFRACTORY CONSISTING ESSENTIALLY OF 25 TO 40 PERCENT BY WEIGHT SILICA AND 52 TO 72 PERCENT BY WEIGHT CALCIUM ALUMINATE CEMENT, A LAYER OF FERROUS SHEET METAL ON THE OUTSIDE OF SAID BODY, AND A LAYER OF PLASTIC BASIC REFRACTORY OVER SAID METAL LAYER AND CONTAINING ON A WET PLASTIC BASIS 30 TO 35 PERCENT BY WEIGHT CHROME ORE AND
Claim 2
Dependent Claim
79 words
A MONOLITHIC LINER FOR A BOTTOM FIRED SOAKING PIT BURNER PORT COMPRISING AND ANNULAR BODY OF CASTABLE SILICEOUS ACID REFRACTORY CONSISTING ESSENTIALLY OF 25 TO 40 PERCENT BY WEIGHT SILICA AND 52 TO 72 PERCENT BY WEIGHT CALCIUM ALUMINATE CEMENT, A LAYER OF FERROUS SHEET METAL ON THE OUTSIDE OF SAID BODY, AND A LAYER OF PLASTIC BASIC REFRACTORY OVER SAID METAL LAYER AND CONTAINING ON A WET PLASTIC BASIS 30 TO 35 PERCENT BY WEIGHT CHROME ORE AND
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) | 1960-07-29 | 1961-01-28 | 1961-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-29 | 1965-01-28 | 1965-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-29 | 1969-01-28 | 1969-07-30 | $7700.00 | Window Closed / Lapsed |