Patent US2804935A successfully refreshed from Google Patents.
US2804935A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vapor-liquid contacting apparatus
Assignee: Individual
•
Filing: 1956-07-27
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Granted: 1957-09-03
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Expires: 1976-07-27
Abstract
No abstract record available.
Inventors
- 👤 Arthur J L Hutchinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:18
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/14; B01D3/00; B01D3/14; B01D3/26; B01D53/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
128 words
A LIQUID-VAPOR CONTACTING TRAY-UNIT COMPRISING: LIQUID COLLECTING MEANS, MEANS FOR MAINTAINING A FIRST BODY OF LIQUID, OVERFLOW MEANS FOR REMOVING A PORTION OF SAID LIQUID FROM SAID TRAY UNIT, LIQUID ENTRAINMENT MEANS IN SAID UNIT PROVIDED WITH A VERTIVAL VAPOR PASSAGE AND WITH MEANS FOR MAINTAINNG A SECOND BODY OF LIQUID AT A SUBSTANTIALLY CONSTANT LEVEL, METERING MEANS FOR SUPPLYING LIQUID AT A PREDETERMINED SUBSTANTIALLY CONSTANT VOLUMETRIC RATE INDEPENDENT OF THE RATE OF VAPOR FOLW FROM SAID FIRST BODY TO SAID SECOND BODY OF LIQUID, A RISER PIPE AXIALLY ALIGNED WITH AND OF LARGER DIAMETER THAN SAID VAPOR PASSAGE, SAID RISER PIPE EXTENDING BELOW THE NORMAL LIQUID LEVEL OF SAID SECOND BODY OF LIQUID A SUFFICIENT DISTANCE TO FORM A LIQUID SEAL, MEANS TO DEFLECT VERTICAL FLOW OF
Claim 2
Dependent Claim
128 words
A LIQUID-VAPOR CONTACTING TRAY-UNIT COMPRISING: LIQUID COLLECTING MEANS, MEANS FOR MAINTAINING A FIRST BODY OF LIQUID, OVERFLOW MEANS FOR REMOVING A PORTION OF SAID LIQUID FROM SAID TRAY UNIT, LIQUID ENTRAINMENT MEANS IN SAID UNIT PROVIDED WITH A VERTIVAL VAPOR PASSAGE AND WITH MEANS FOR MAINTAINNG A SECOND BODY OF LIQUID AT A SUBSTANTIALLY CONSTANT LEVEL, METERING MEANS FOR SUPPLYING LIQUID AT A PREDETERMINED SUBSTANTIALLY CONSTANT VOLUMETRIC RATE INDEPENDENT OF THE RATE OF VAPOR FOLW FROM SAID FIRST BODY TO SAID SECOND BODY OF LIQUID, A RISER PIPE AXIALLY ALIGNED WITH AND OF LARGER DIAMETER THAN SAID VAPOR PASSAGE, SAID RISER PIPE EXTENDING BELOW THE NORMAL LIQUID LEVEL OF SAID SECOND BODY OF LIQUID A SUFFICIENT DISTANCE TO FORM A LIQUID SEAL, MEANS TO DEFLECT VERTICAL FLOW OF
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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) | 1960-09-02 | 1961-03-04 | 1961-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-02 | 1965-03-04 | 1965-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-02 | 1969-03-04 | 1969-09-03 | $7700.00 | Window Closed / Lapsed |