US2865920A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for concentration of liquid solutions
Assignee: National Petro-Chemicals Corp
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Filing: 1955-06-27
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Granted: 1958-12-23
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Expires: 1975-06-27
Abstract
No abstract record available.
Inventors
- 👤 David J Stark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:39
CPC Classifications
B; B01; B01D; B01D1/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
152 words
AN APPARATUS, ADAPTED FOR CONCENTRATION OF LIQUID SOLUTIONS, COMPRISING A VERTICALLY ELONGATED VESSEL VERTICALLY PARTITIONED INTO A PLURALITY OF COMPARTMENTS, A HEATING SURFACE IN EACH OF SAID COMPARTMENTS, SAID HEATING SURFACE BEING POSITIONED AT AN ELEVATION ABOVE THE BOTTOM BUT BELOW THE TOP OF THE COMPARTMENT, INLET MEANS IN THE FIRST OF SAID COMPARTMENTS FOR INTRODUCTION OF LIQUID INTO A LOWER PORTION OF SAID FIRST COMPARTMENT, MEANS IN THE LOWER PORTION OF ALL BUT THE LAST OF SAID COMPARTMENTS FOR PASSAGE OF LIQUID FROM EACH COMPARTMENT, OUTLET MEANS IN THE LAST OF SAID COMPARTMENTS FOR WITHDRAWAL OF LIQUID FROM SAID LAST COMPARTMENT, SAID OUTLET MEANS BEING POSITIONED AT AN ELEVATION ABOVE THE HEATING SURFACE IN SAID LAST COMPARTMENT, AND BAFFLE MEANS IN EACH OF SAID COMPARTMENTS POSITIONED WITH RESPECT TO THE INLET MEANS TO EACH COMPARTMENT TO DIRECT LIQUID INTRODUCED INTO EACH COMPARTMENT INTO CONTACT WITH THE HEATING SURFACE IN THAT COMPARTMENT.
Claim 2
Independent Claim
152 words
AN APPARATUS, ADAPTED FOR CONCENTRATION OF LIQUID SOLUTIONS, COMPRISING A VERTICALLY ELONGATED VESSEL VERTICALLY PARTITIONED INTO A PLURALITY OF COMPARTMENTS, A HEATING SURFACE IN EACH OF SAID COMPARTMENTS, SAID HEATING SURFACE BEING POSITIONED AT AN ELEVATION ABOVE THE BOTTOM BUT BELOW THE TOP OF THE COMPARTMENT, INLET MEANS IN THE FIRST OF SAID COMPARTMENTS FOR INTRODUCTION OF LIQUID INTO A LOWER PORTION OF SAID FIRST COMPARTMENT, MEANS IN THE LOWER PORTION OF ALL BUT THE LAST OF SAID COMPARTMENTS FOR PASSAGE OF LIQUID FROM EACH COMPARTMENT, OUTLET MEANS IN THE LAST OF SAID COMPARTMENTS FOR WITHDRAWAL OF LIQUID FROM SAID LAST COMPARTMENT, SAID OUTLET MEANS BEING POSITIONED AT AN ELEVATION ABOVE THE HEATING SURFACE IN SAID LAST COMPARTMENT, AND BAFFLE MEANS IN EACH OF SAID COMPARTMENTS POSITIONED WITH RESPECT TO THE INLET MEANS TO EACH COMPARTMENT TO DIRECT LIQUID INTRODUCED INTO EACH COMPARTMENT INTO CONTACT WITH THE HEATING SURFACE IN THAT COMPARTMENT.
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) | 1961-12-22 | 1962-06-23 | 1962-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-22 | 1966-06-23 | 1966-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-22 | 1970-06-23 | 1970-12-23 | $7700.00 | Window Closed / Lapsed |