Patent US3874418A successfully refreshed from Google Patents.
Patent US3198503A successfully refreshed from Google Patents.
US3198503A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Furnace
Assignee: Basic Products Corp
•
Filing: 1963-04-29
•
Granted: 1965-08-03
•
Expires: 1983-04-29
Abstract
No abstract record available.
Inventors
- 👤 Henry L Eichelberg
- 👤 Rita L Thomson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:33
CPC Classifications
C; C21; C21D; C21D1/00; C21D1/74
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
IN A FURNANCE HAVING INSULATING REFRACTORY BOTTOM, SIDE AND TOP WALLS, A RETORT WITHIN SAID FURNANCE; ANOTHER INSULATING REFRACTORY WALL BETWEEN SAID SIDE WALL AND RETORT, AND FORMING A PLENUM CHAMBER BETWEEN SAID SIDE WALL AND OTHER REFRACTORY WALL; BURNER MEANS EXTENDING THROUGH THE SIDE AND OTHER WALL; A STACK CONNECTED TO THE SPACE BETWEEN SAID OTHER WALL AND RETORT; AND MEANS FOR SUPPLYING AIR UNDER PRESSURE TO SAID PLENUM BETWEEN SAID SIDE WALL AND OTHER WALL, WHEREBY SAID PRESSURIZED AIR DIFFUSES THROUGH SAID OTHER WALL AND PASSES OUT SAID STACK THEREBY TO COOL SAID RETORT.
Claim 2
Dependent Claim
96 words
IN A FURNANCE HAVING INSULATING REFRACTORY BOTTOM, SIDE AND TOP WALLS, A RETORT WITHIN SAID FURNANCE; ANOTHER INSULATING REFRACTORY WALL BETWEEN SAID SIDE WALL AND RETORT, AND FORMING A PLENUM CHAMBER BETWEEN SAID SIDE WALL AND OTHER REFRACTORY WALL; BURNER MEANS EXTENDING THROUGH THE SIDE AND OTHER WALL; A STACK CONNECTED TO THE SPACE BETWEEN SAID OTHER WALL AND RETORT; AND MEANS FOR SUPPLYING AIR UNDER PRESSURE TO SAID PLENUM BETWEEN SAID SIDE WALL AND OTHER WALL, WHEREBY SAID PRESSURIZED AIR DIFFUSES THROUGH SAID OTHER WALL AND PASSES OUT SAID STACK THEREBY TO COOL SAID RETORT.
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 |