Patent US5162265A successfully refreshed from Google Patents.
Patent US2744571A successfully refreshed from Google Patents.
US2744571A
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Evaporating process
Assignee: Goslin-Birmingham Manuf Co
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Filing: 1953-09-28
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Granted: 1956-05-08
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Expires: 1973-09-28
Abstract
No abstract record available.
Inventors
- 👤 Mair James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 06:32
CPC Classifications
B; B01; B01D; B01D3/00; B01D3/08; B01D1/00; B01D1/26; C; C01; C01F; C01F7/00; C01F7/02; C01F7/04; Y; Y10; Y10S; Y10S159/00; Y10S159/08
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
118 words
IN THE EVAPORATION OF SODIUM ALUMINATE LIQUOR IN A MULTIPLE EFFECT SYSTEM, THE PROCESS WHICH COMPRISES DIVIDING THE LIQUOR FEED BETWEEN A FIRST AND A SECOND GROUP OF THE EFFECTS, FEEDING A PORTION OF THE LIQUOR IN FORWARD FLOW WITH RESPECT TO VAPOR FLOW THROUGH SAID FIRST GROUP OF EFFECTS, FEEDING THE OTHER PORTION OF THE LIQUOR IN BACKWARD FLOW WITH RESPECT TO VAPOR FLOW THROUGH SAID SECOND GROUP OF EFFECTS, AND PASSING THE LIQUOR FROM THE LAST OF THE FIRST GROUP OF EFFECTS AND THE FIRST OF THE SECOND GROUP OF EFFECTS THROUGH A SERIES OF FLASH TANKS WHEREBY THE LIQUOR ATTAINS FULL CONCENTRATION IN THE LIQUOR FLASH TANKS AND OUT OF CONTACT WITH HEAT TRANSFER SURFACES.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-05-08 | 1959-11-07 | 1960-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-08 | 1963-11-07 | 1964-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-08 | 1967-11-07 | 1968-05-08 | $7700.00 | Window Closed / Lapsed |