US3917811A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Interactive surface mixer
Assignee: National Oilwell Varco LP
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Filing: 1973-06-25
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Granted: 1975-11-04
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Expires: 1993-06-25
Abstract
Abstract A device for producing a physical or chemical change of state in a fluid flowing through a conduit which contains a plurality of curved sheet-like elements extending longitudinally through the conduit and in which consecutive elements are curved in opposite directions. The internal surfaces of the conduit and the surfaces of the sheet-like elements are coated with a material which interacts with a component of the fluid to produce such change. The surfaces may be formed of water or other solvents, catalysts, enzymes or other biologically active materials, and the fluid may contain components soluble in such solvents, or the fluid may contain materials upon which such catalysts, enzymes or biologically active materials act to produce the desired change of state.
Inventors
- 👤 Kenneth M Grout
- 👤 Richard D Devellian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:18
CPC Classifications
F; F01; F01N; F01N3/00; F01N3/02; F01N3/04; B; B01; B01J; B01J14/00; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
219 words
THE PROCESS OF PRODUCING A PHYSIOCHEMICAL CHANGE OF STATE INTERACTION BETWEEN A FLUID AND A MATERIAL WHICH IS PHYSIOCHEMICALLY INTERACTIVE WITH SUCH FLUID, WHICH PROCESS COMPRISES: A. COATING INTERNAL SURFACE OF AN ELONGATED CONDUIT WITH SAID MATERIAL B. FLOWING A STREAM OF SAID FLUID THROUGH SAID CONDUIT AT LAMINAR FLOW VELOCITIES BELOW TURBULENANCE LEVELS, C. SPLITTING SAID STREAM OF SAID FLUID THROUGH SAID CONDUIT AT D. DIRECTING THE FLOW OF EACH OF SAID COMPONENTS IN A HELICAL PATH WITHIN A LIMITED LENGTH OF SAID CONDUIT, E. SPLITTING EACH OF SAID COMPONENTS AT THE END OF SAI LIMITED LENGTH INTO TWO ADDITIONAL COMPONENTS, F. DIRECTING THE FLOW OF EACH OF SAID ADDITIONAL COMPONENTS IN A HELICAL PATH OF OPPOSITE SENSE TO SAID FIRST MENTIONED HELICIAL PATH WITHIN AN ADDITIONAL LINITED LENGTH OF SAID CONDUIT, F. THE FLOWING OF SAID FLUID ALONG SAID HELICAL PATHS CAUSING SAID FLUID TO FLOW SUCCESSIVELY TOWARD AND AWAY FROM SAID COATED INTERNAL SURFACES OF SAID CONDUIT IN A DIRECTION TRANSVERSE TO THE GENERAL DIRECTION OF FLOW OF SAID STREAM, WEREBY SAID PHYSIOCHEMICAL CHANGE OF STATE IS GENETATED BETWEEN THE FLUID THUS BROUGHT INTO CONTACT WITH SAID SURFACES AND MATERIAL COATED ON SAID SURFACES, AND H. DISCHARGING SAID FLUID FROM SAID CONDUIT AFTER ITS COMPONENTS HAVE BEEN SUBJECTED TO A PLURALITY OF SAID HELICAL FLOW REVERSALS.
Claim 2
Dependent Claim
219 words
THE PROCESS OF PRODUCING A PHYSIOCHEMICAL CHANGE OF STATE INTERACTION BETWEEN A FLUID AND A MATERIAL WHICH IS PHYSIOCHEMICALLY INTERACTIVE WITH SUCH FLUID, WHICH PROCESS COMPRISES: A. COATING INTERNAL SURFACE OF AN ELONGATED CONDUIT WITH SAID MATERIAL B. FLOWING A STREAM OF SAID FLUID THROUGH SAID CONDUIT AT LAMINAR FLOW VELOCITIES BELOW TURBULENANCE LEVELS, C. SPLITTING SAID STREAM OF SAID FLUID THROUGH SAID CONDUIT AT D. DIRECTING THE FLOW OF EACH OF SAID COMPONENTS IN A HELICAL PATH WITHIN A LIMITED LENGTH OF SAID CONDUIT, E. SPLITTING EACH OF SAID COMPONENTS AT THE END OF SAI LIMITED LENGTH INTO TWO ADDITIONAL COMPONENTS, F. DIRECTING THE FLOW OF EACH OF SAID ADDITIONAL COMPONENTS IN A HELICAL PATH OF OPPOSITE SENSE TO SAID FIRST MENTIONED HELICIAL PATH WITHIN AN ADDITIONAL LINITED LENGTH OF SAID CONDUIT, F. THE FLOWING OF SAID FLUID ALONG SAID HELICAL PATHS CAUSING SAID FLUID TO FLOW SUCCESSIVELY TOWARD AND AWAY FROM SAID COATED INTERNAL SURFACES OF SAID CONDUIT IN A DIRECTION TRANSVERSE TO THE GENERAL DIRECTION OF FLOW OF SAID STREAM, WEREBY SAID PHYSIOCHEMICAL CHANGE OF STATE IS GENETATED BETWEEN THE FLUID THUS BROUGHT INTO CONTACT WITH SAID SURFACES AND MATERIAL COATED ON SAID SURFACES, AND H. DISCHARGING SAID FLUID FROM SAID CONDUIT AFTER ITS COMPONENTS HAVE BEEN SUBJECTED TO A PLURALITY OF SAID HELICAL FLOW REVERSALS.
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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) | 1978-11-03 | 1979-05-05 | 1979-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-03 | 1983-05-05 | 1983-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-03 | 1987-05-05 | 1987-11-04 | $7700.00 | Window Closed / Lapsed |