US3205843A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pulverized coal firing system
Assignee: Combustion Engineering Inc
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Filing: 1961-12-27
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Granted: 1965-09-14
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Expires: 1981-12-27
Abstract
No abstract record available.
Inventors
- 👤 Bogot Alexander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:35
CPC Classifications
F; F23; F23C; F23C99/00; F23C2700/00; F23C2700/06; F23C2700/063
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
133 words
A SUCTION FIRING SYSTEM FOR AW FURNACE OPERATED AT SUBATMOSPHERIC PRESSURE COMPRISING MEANS PROVIDING A STREAM OF SECONDARY AIR AT A PRESSURE SOMEWHAT ABOVE ATMOSPHERIC, AIR HEATER MEANS THROUGH WHICH SAID STREAM IS CONVEYED, AN AIR SWEKPT PULVERIZING MILL, MEANS SUPPLYING MILL AIR TO SAID MILL INCLUDING MEANS OPERATIVE TO WITHDRAW AIR FROM THE STREAM OF SECONDARY AIR DOWNSTREAM OF THE AIR HEATER AND MEANS TO WITHDRAW AIR FROM SAID STREAM UPSTREAM OF THE AIR HEATER, INDEPENDENT CONTROL MEANS ASSOCIATED WITH EACH OF THESE LAST TWO MENTIONED MEANS, AN EXHAUSTER CONNECTED WITH THE OUTLET OF THE MILL AND DISCHARGING INTO SAID FURNACE, MEANS RESPONSIVE TO THE PRESSURE IN THE MILL AT A LOCATION WELL DOWNSTREAM OF THE AIR INLET THERETO AND OPERATIVE TO CONTROL ONE OF SAID INDEPENDENT MEANS TO CONTROL SAID PRESSURE.
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) | 1968-09-13 | 1969-03-15 | 1969-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-13 | 1973-03-15 | 1973-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-13 | 1977-03-15 | 1977-09-14 | $7700.00 | Window Closed / Lapsed |