Patent US2849292A successfully refreshed from Google Patents.
US2849292A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pulp manufacture
Assignee: Mead Corp
•
Filing: 1956-04-09
•
Granted: 1958-08-26
•
Expires: 1976-04-09
Abstract
No abstract record available.
Inventors
- 👤 Philip E Shick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:10
CPC Classifications
D; D21; D21C; D21C11/00; D21C11/0064; D21C11/0071
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
157 words
IN RECOVERY APPARATUS OF THE CHARACTER DESCRIBED FOR RECOVERY OF HEAT AND CHEMICALS FROM PULP MANUFACTURING SPENT COOKING LIQUORS, THE COMBINATION WHICH COMPRISES A RECOVERY FURNACE FOR COMBUSTION OF SAID SPENT LIQUOR, A SCRUBBING TOWER FOR REMOVING SULPHUR DIOXIDE FROM EFFLUENT GASES FROM SAID FURNACE, MEANS FOR EXHAUSTING TO THE ATMOSPHERE A LIMITED PORTION OF SAID GASES FLOWING OUT OF SAID SCRUBBING TOWER, MEANS FOR DISSOLVING MOLTEN FURNACE PRODUCTS FROM SAID FURNACE, COUNTER CURRENT CARBONATION TOWER MEANS FOR REACTING ANOTHER LIMITED PORTION OF SAID EFFLUENT GASES FROM SAID SCRUBBING TOWER WITH SAID SOLUTION OF SAID MOLTEN FURNACE PRODUCTS, A GAS TAKE-OFF IN SAID CARBONATION TOWER MEANS INTERMEDIATE THE ENDS THEREOF FOR RETURNING DIRECTLY TO SAID FURNACE A LIMITED PORTION OF SAID GASES FLOWING THROUGH SAID CARBONATION TOWER MEANS, AND A GAS EXHAUST AT ONE END OF SAID CARBONATION TOWER MEANS FOR EXHAUSTING TO THE ATMOSPHERE ANOTHER LIMITED PORTION OF SAID GASES FLOWING THROUGH SAID CARBONATION TOWER MEANS.
Claim 2
Dependent Claim
157 words
IN RECOVERY APPARATUS OF THE CHARACTER DESCRIBED FOR RECOVERY OF HEAT AND CHEMICALS FROM PULP MANUFACTURING SPENT COOKING LIQUORS, THE COMBINATION WHICH COMPRISES A RECOVERY FURNACE FOR COMBUSTION OF SAID SPENT LIQUOR, A SCRUBBING TOWER FOR REMOVING SULPHUR DIOXIDE FROM EFFLUENT GASES FROM SAID FURNACE, MEANS FOR EXHAUSTING TO THE ATMOSPHERE A LIMITED PORTION OF SAID GASES FLOWING OUT OF SAID SCRUBBING TOWER, MEANS FOR DISSOLVING MOLTEN FURNACE PRODUCTS FROM SAID FURNACE, COUNTER CURRENT CARBONATION TOWER MEANS FOR REACTING ANOTHER LIMITED PORTION OF SAID EFFLUENT GASES FROM SAID SCRUBBING TOWER WITH SAID SOLUTION OF SAID MOLTEN FURNACE PRODUCTS, A GAS TAKE-OFF IN SAID CARBONATION TOWER MEANS INTERMEDIATE THE ENDS THEREOF FOR RETURNING DIRECTLY TO SAID FURNACE A LIMITED PORTION OF SAID GASES FLOWING THROUGH SAID CARBONATION TOWER MEANS, AND A GAS EXHAUST AT ONE END OF SAID CARBONATION TOWER MEANS FOR EXHAUSTING TO THE ATMOSPHERE ANOTHER LIMITED PORTION OF SAID GASES FLOWING THROUGH SAID CARBONATION TOWER MEANS.
References Cited (Backward Citations)
US1864619A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-08-25 | 1962-02-24 | 1962-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-25 | 1966-02-24 | 1966-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-25 | 1970-02-24 | 1970-08-26 | $7700.00 | Window Closed / Lapsed |