US3338016A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plural tapered refractory blocks and tightly fitting metal case therefor
Assignee: Kaiser Aluminum and Chemical Corp
•
Filing: 1964-01-28
•
Granted: 1967-08-29
•
Expires: 1984-01-28
Abstract
No abstract record available.
Inventors
- 👤 Thomas W Bailey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:29
CPC Classifications
F; F27; F27D; F27D1/00; F27D1/04; F27D1/06; F27D1/08
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
107 words
A REFRACTORY UNIT COMPRISING A TUBULAR SHEET METAL CASING TIGHTLY ENCIRCLING AND COVERING THE MAJOR PORTION OF THE EXPOSED SIDE FACES OF A PLURALITY OF PERFORMED REFRACTORY SHAPES, AT LEAST ONE OF SAID REFRACTORY SHAPES BEING A TAPERED SHAPE HAVING A LARGER END, A SMALLER END, AND AT LEAST TWO CONVERGING SIDE FACES BETWEEN SAID ENDS, THE TAPERED SHAPE BEING DISPOSED WITHIN SAID CASING WITH ONE OF SAID CONVERGING SIDE FACES IN CONFRONTING RELATIONSHIP AND SUBSTANTIALLY COEXTENSIVE WITH A SIDE FACE OF ANOTHER REFRACTORY SHAPE AND ANOTHER OF SAID CONVERGING SIDE FACES IN TIGHT CONFRONTING RELATIONSHIP WITH THE METAL CASING, FIRST REFRACTORY UNIT BEING OF TAPERED CONFIGURATION.
References Cited (Backward Citations)
US134622A
Cited
USRE25615E
Cited
US2187669A
Cited
US2465170A
Cited
US3109259A
Cited
AT222017B
Cited
FR1264019A
Cited
FR1311675A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-08-28 | 1971-02-27 | 1971-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-28 | 1975-02-27 | 1975-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-28 | 1979-02-27 | 1979-08-29 | $7700.00 | Window Closed / Lapsed |