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US3087435A Expired / Lapsed US ⏱️ 0.0 years remaining

Pumping process

Assignee: EIDP Inc
•
Filing: 1961-03-31
•
Granted: 1963-04-30
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Expires: 1981-03-31
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Abstract

No abstract record available.

Inventors

  • 👤 Boucher Donald Frederick

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-23 03:40
CPC Classifications
F; F04; F04D; F04D3/00; F04D3/02

Claims Analysis

Total Claims: 2
Claim 1
Independent Claim 194 words
AN IMPROVED METHOD OF UNIFORMLY MOVING A MASS OF HIGHLY VISCOUS LIQUID IN PLUG FLOW FROM A FIRST POSITION TO A SPACED SECOND POSITION IN A CLOSED CONDUIT, SAID CONDUIT PROVIDED WITH AN INNER SURFACE, SAID METHOD COMPRISING THE STEPS OF INTRODUCING A MASS OF HIGHLY VISCOUS LIQUID INTO THE CONDUIT, CREATING A PRESSURE DROP IN THE CONDUIT ACROSS SAID TWO POSITIONS SUFFICIENT TO MOVE AT LEAST A PORTION OF THE LIQUID IN SAID CONDUIT FROM SAID FIRST TO SAID SECOND POSITION SO THAT SAID LIQUID IN THE CENTER PORTION OF THE CONDUIT MOVES AT A HIGHER VELOCITY THAN SAID LIQUID IN OUTER PORTIONS ADJACENT THE INNER SURFACE OF THE CONDUIT DUE TO FRICTIONAL FORCES, AND MAINTAINING THE LIQUID IN THE CENTER PORTION OF THE CONDUIT IN UNDISTURBED FLOW CONDITION WHILE APPLYING A SUFFICIENT IMPELLING FORCE ONLY TO SAID OUTER PORTIONS OF THE LIQUID ADJACENT THE INNER SURFACE OF THE CONDUIT SUBSTANTIALLY IN THE GENERAL DIRECTION OF LIQUID MOVEMENT IN THE CONDUIT TO PRODUCE SUFFICIENT INCREASED LIQUID FLOW IN SAID PORTIONS SUCH THAT THE VELOCITY OF THE FLOWING LIQUID IN SAID CONDUIT IS SUBSTANTIALLY CONSTANT THROUGHOUT ANY GIVEN TRANSVERSE CROSS-SECTIONAL ZONE OF SAID LIQUID.
Claim 2
Dependent Claim 194 words
AN IMPROVED METHOD OF UNIFORMLY MOVING A MASS OF HIGHLY VISCOUS LIQUID IN PLUG FLOW FROM A FIRST POSITION TO A SPACED SECOND POSITION IN A CLOSED CONDUIT, SAID CONDUIT PROVIDED WITH AN INNER SURFACE, SAID METHOD COMPRISING THE STEPS OF INTRODUCING A MASS OF HIGHLY VISCOUS LIQUID INTO THE CONDUIT, CREATING A PRESSURE DROP IN THE CONDUIT ACROSS SAID TWO POSITIONS SUFFICIENT TO MOVE AT LEAST A PORTION OF THE LIQUID IN SAID CONDUIT FROM SAID FIRST TO SAID SECOND POSITION SO THAT SAID LIQUID IN THE CENTER PORTION OF THE CONDUIT MOVES AT A HIGHER VELOCITY THAN SAID LIQUID IN OUTER PORTIONS ADJACENT THE INNER SURFACE OF THE CONDUIT DUE TO FRICTIONAL FORCES, AND MAINTAINING THE LIQUID IN THE CENTER PORTION OF THE CONDUIT IN UNDISTURBED FLOW CONDITION WHILE APPLYING A SUFFICIENT IMPELLING FORCE ONLY TO SAID OUTER PORTIONS OF THE LIQUID ADJACENT THE INNER SURFACE OF THE CONDUIT SUBSTANTIALLY IN THE GENERAL DIRECTION OF LIQUID MOVEMENT IN THE CONDUIT TO PRODUCE SUFFICIENT INCREASED LIQUID FLOW IN SAID PORTIONS SUCH THAT THE VELOCITY OF THE FLOWING LIQUID IN SAID CONDUIT IS SUBSTANTIALLY CONSTANT THROUGHOUT ANY GIVEN TRANSVERSE CROSS-SECTIONAL ZONE OF SAID LIQUID.

References Cited (Backward Citations)

US455384A Cited
US649065A Cited
GB190400229A Cited
US1359048A Cited
DE389793C Cited
FR666036A Cited
US2699870A Cited
US2920347A Cited
FR1184766A Cited
US2896253A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1966-04-29 1966-10-29 1967-04-30 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1970-04-29 1970-10-29 1971-04-30 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1974-04-29 1974-10-29 1975-04-30 $7700.00 Window Closed / Lapsed

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