Patent US5734699A successfully refreshed from Google Patents.
Patent US2733909A successfully refreshed from Google Patents.
US2733909A
Expired / Lapsed
US
⏱️ 0.0 years remaining
engelhart
Assignee: —
•
Filing: —
•
Granted: 1956-02-07
•
Expires: 1973-02-07
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 06:23
CPC Classifications
F; F27; F27B; F27B7/00; F27B7/20; F27B7/2016; F27B7/2025
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
155 words
THE METHOD OF PREHEATING KILN FEED MATERIAL WHICH COMPRISES PASSING THE FEED MATERIAL SERIALLY THROUGH A PLURALITY OF HEAT EXCHANGERS, BRINGING THE FEED MATERIAL IN SAID HEAT EXCHANGERS IN DIRECT CONTACT WITH THE HOT EXIT GASES FROM THE KILN WHILE SIAD GASES ARE PASSING COUNTER-CURRENT TO THE GENERAL DIRECTION OF FLOW OF THE FEED MATERIAL, SEPARATING THE FEED MATERIAL FROM THE HOT GASES IN THE SEVERAL HEAT EXCHANGERS OF THE SERIES, INTRODUCING THE FEED MATERIAL SEPARATRED FROM THE HOT GASES IN THE LAST OF THE SERIES OF HEAT EXCHANGERS INTO THE KILN, SEPARATING FINELY-DIVIDED DUST MATERIAL FROM THE DISCHARGE GASES OF THE FIRST HEAT EXCHANGER OF THE SERIES, ADDING THE SEPARATED DUST MATERIAL TO PRE-HEATED FEED MATERIAL BEING DISCHARGED FROM ONE OF THE HEAT EXCHANGERS AND ON ITS WAY TO A SUCCEEDING HEAT EXCHANGER OF THE SERIES, COMPLETING THE MIXING OF THE DUST AND FEED MATERIAL IN SAID SUCCEEDING HEAT EXCHANGER WHILE SUBJECTING THE MATERIALS
Claim 2
Independent Claim
155 words
THE METHOD OF PREHEATING KILN FEED MATERIAL WHICH COMPRISES PASSING THE FEED MATERIAL SERIALLY THROUGH A PLURALITY OF HEAT EXCHANGERS, BRINGING THE FEED MATERIAL IN SAID HEAT EXCHANGERS IN DIRECT CONTACT WITH THE HOT EXIT GASES FROM THE KILN WHILE SIAD GASES ARE PASSING COUNTER-CURRENT TO THE GENERAL DIRECTION OF FLOW OF THE FEED MATERIAL, SEPARATING THE FEED MATERIAL FROM THE HOT GASES IN THE SEVERAL HEAT EXCHANGERS OF THE SERIES, INTRODUCING THE FEED MATERIAL SEPARATRED FROM THE HOT GASES IN THE LAST OF THE SERIES OF HEAT EXCHANGERS INTO THE KILN, SEPARATING FINELY-DIVIDED DUST MATERIAL FROM THE DISCHARGE GASES OF THE FIRST HEAT EXCHANGER OF THE SERIES, ADDING THE SEPARATED DUST MATERIAL TO PRE-HEATED FEED MATERIAL BEING DISCHARGED FROM ONE OF THE HEAT EXCHANGERS AND ON ITS WAY TO A SUCCEEDING HEAT EXCHANGER OF THE SERIES, COMPLETING THE MIXING OF THE DUST AND FEED MATERIAL IN SAID SUCCEEDING HEAT EXCHANGER WHILE SUBJECTING THE MATERIALS
References Cited (Backward Citations)
US2190234A
Cited
US2648532A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-02-06 | 1959-08-08 | 1960-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-02-06 | 1963-08-08 | 1964-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-02-06 | 1967-08-08 | 1968-02-07 | $7700.00 | Window Closed / Lapsed |