US2746563A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Purification of gases
Assignee: Beazer East Inc
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Filing: 1953-06-09
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Granted: 1956-05-22
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Expires: 1973-06-09
Abstract
No abstract record available.
Inventors
- 👤 Earl V Harlow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:35
CPC Classifications
B; B03; B03C; B03C3/00; B03C3/01; B03C3/013
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
A PROCESS TO REDUCE BACK DISCHARGE IN THE ELECTRICAL PRECIPITATION OF FLY ASH FROM COMBUSTION CHAMBER STACK GASES CONTAINING SO2 COMPRISING THE STEPS OF PASSING SAID STACK GASES EMANATING FROM A COMBUSTION CHAMBER, PRIOR TO THE PRECIPITATION OF THE FLY ASH IN SAID GASES, THROUGH A ZONE HAVING DISPOSED THEREIN A CATALYTIC SURFACE OF SUFFICIENT AREA TO CONVERT A PORTION OF SAID SO2 TO SO3, AND SUBSEQUENTLY PASSING SAID GASES TO AN ELECTRICAL PRECIPITATION ZONE TO REMOVE THE FLY ASH FROM SAID GASES.
Claim 2
Dependent Claim
83 words
A PROCESS TO REDUCE BACK DISCHARGE IN THE ELECTRICAL PRECIPITATION OF FLY ASH FROM COMBUSTION CHAMBER STACK GASES CONTAINING SO2 COMPRISING THE STEPS OF PASSING SAID STACK GASES EMANATING FROM A COMBUSTION CHAMBER, PRIOR TO THE PRECIPITATION OF THE FLY ASH IN SAID GASES, THROUGH A ZONE HAVING DISPOSED THEREIN A CATALYTIC SURFACE OF SUFFICIENT AREA TO CONVERT A PORTION OF SAID SO2 TO SO3, AND SUBSEQUENTLY PASSING SAID GASES TO AN ELECTRICAL PRECIPITATION ZONE TO REMOVE THE FLY ASH FROM SAID GASES.
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) | 1959-05-22 | 1959-11-21 | 1960-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-22 | 1963-11-21 | 1964-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-22 | 1967-11-21 | 1968-05-22 | $7700.00 | Window Closed / Lapsed |