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US3578404A Expired / Lapsed US ⏱️ 0.0 years remaining

Automatic reaction rate apparatus

Assignee: Dow Chemical Co
•
Filing: 1967-12-04
•
Granted: 1971-05-11
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Expires: 1987-12-04
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Abstract

Abstract METHOD AND APPARATUS FOR ASCERTAINING THE RATE OF REACTION THAT EVOLVES OR CONSUMES A GAS; COMPRISING A CLOSED, CIRCUITOUS DUCT A FIRST UPSTREAM END OF WHICH ORIGINATES AT A DOWNSTREAM PORTION OF A REACTION VESSEL, PROCEEDS THROUGH VALVE MEANS, PUMP MEANS, AND PRESSURE SENSING MEANS, MEANS FOR SENSING AT LEAST ONE KIND OF INFLUENCE UPON THE RATE OF A REACTION IN SAID REACTION VESSEL, AND OPTIONALLY OTHER MEANS, RETURNING TO TERMINATE AT A SECOND, DOWNSTREAM END AT AN UPSTREAM PORTION OF SAID REACTION VESSEL WHICH, IN TURN, COMMUNICATES WITH SAID FIRST END. BY CONTROL UNDER PROVIDED TIMING MEANS, CONFINED GAS PRESSURE IS SENSED IN INCREMENTS, ALONG WITH INCREMENTS OF REACTION-RATE INFLUENCES SUCH AS HEAT; DURING OPERATION THE INTERIOR OF THE DUCT AND VESSEL ARE RETURNED TO REFERENCE PRESSURE AFTER EACH SENSING INCREMENT AND ARE SUBJECT TO SUBSTANTIALLY CONTINUOUS MOVEMENT OF GAS.

Inventors

  • 👤 Wilhelm E Walles
  • 👤 William F Tousignant

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-01 19:05
CPC Classifications
G; G01; G01N; G01N31/00; G01N7/00; Y; Y10; Y10T; Y10T436/00; Y10T436/12

Claims Analysis

Total Claims: 0
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References Cited (Backward Citations)

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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) 1974-05-10 1974-11-09 1975-05-11 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1978-05-10 1978-11-09 1979-05-11 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1982-05-10 1982-11-09 1983-05-11 $7700.00 Window Closed / Lapsed

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