US3231184A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid contact process and apparatus
Assignee: Dresser Industries Inc
•
Filing: 1963-01-07
•
Granted: 1966-01-25
•
Expires: 1983-01-07
Abstract
No abstract record available.
Inventors
- 👤 Walter J Podbielniak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:11
CPC Classifications
B; B04; B04B; B04B5/00; B04B5/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
IN A CENTRIFUGAL COUNTERCURRENT CONTACT APPARATUS FOR EFFECTING INTIMATE CONTACT BETWEEN AT LEAST PARTIALLY IMMISCIBLE LIQUIDS OF DIFFERENT DENSITIES HAVING A ROTOR ROTATABLE ON A HORIZONTAL AXIS WITH AN INTERIOR WORKING SPACE, SAID ROTOR HAVING A PLURALITY OF PARTIAL BARRIERS TO RADIAL FLOW WITHIN THE WORKING SPACE, MEANS FOR SUPPLYING LIGHTER LIQUID TO THE INTERIOR OF THE ROTOR IN THE PROXIMITY OF ITS PERIPHERY, MEANS FOR SUPPLYING HEAVIER LIQUID TO THE ROTOR IN THE PROXIMITY OF ITS AXIS, AND SEPARATE MEANS FOR DISCHARGING HEAVIER LIQUID AND LIGHTER LIQUID FROM SAID ROTOR, EACH OF SAID SUPPLYING MEANS AND SAID DISCHARGING MEANS INCLUDING STATIONARY AND ROTATABLE ELEMENTS; THE IM-
Claim 2
Dependent Claim
107 words
IN A CENTRIFUGAL COUNTERCURRENT CONTACT APPARATUS FOR EFFECTING INTIMATE CONTACT BETWEEN AT LEAST PARTIALLY IMMISCIBLE LIQUIDS OF DIFFERENT DENSITIES HAVING A ROTOR ROTATABLE ON A HORIZONTAL AXIS WITH AN INTERIOR WORKING SPACE, SAID ROTOR HAVING A PLURALITY OF PARTIAL BARRIERS TO RADIAL FLOW WITHIN THE WORKING SPACE, MEANS FOR SUPPLYING LIGHTER LIQUID TO THE INTERIOR OF THE ROTOR IN THE PROXIMITY OF ITS PERIPHERY, MEANS FOR SUPPLYING HEAVIER LIQUID TO THE ROTOR IN THE PROXIMITY OF ITS AXIS, AND SEPARATE MEANS FOR DISCHARGING HEAVIER LIQUID AND LIGHTER LIQUID FROM SAID ROTOR, EACH OF SAID SUPPLYING MEANS AND SAID DISCHARGING MEANS INCLUDING STATIONARY AND ROTATABLE ELEMENTS; THE IM-
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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) | 1969-01-24 | 1969-07-26 | 1970-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-24 | 1973-07-26 | 1974-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-24 | 1977-07-26 | 1978-01-25 | $7700.00 | Window Closed / Lapsed |