Patent US3794467A successfully refreshed from Google Patents.
← Back to Patent Explorer
US3794467A Expired / Lapsed US ⏱️ 0.0 years remaining

Removing substances from a liquid by precipitation in porous glass beads

Assignee: EIDP Inc
•
Filing: 1971-10-28
•
Granted: 1974-02-26
•
Expires: 1991-10-28
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

Abstract A METHOD AND DEVICE FOR REMOVING SUBSTANCES FROM A LIQUID SAMPLE. THE DEVICE INVOLVES A RECEPTACLE CONTAINING POROUS PARTICLES AND AN AGENT THAT WILL PRECIPITATE THE SUBSTANCE TO BE REMOVED. THE POROUS PARTICLES RETAIN ANY PRECIPITATE FORMED. ALSO INCLUDED IS A METHOD AND APPARATUS FOR ANALYZING A LIQUID SAMPLE FOR A PARTICULAR CONSTITUENT WHERE INTERFERING SUBSTANCES MAY BE PRESENT. THE METHOD COMPRISES FORCING SUBSTANTIALLY ALL OF THE SAMPLE THROUGH POROUS PARTICLES CONTAINING A LIQUID THAT WILL EFFECT PRECIPITAION OF THE INTERFERING SUBSTANCE AND INTO A REACTION CHAMBER AND DETERMINING THE PRESENCE OF THE PARTICULAR CONSTITUENT. THE LIQUID WITHIN THE POROUS PARTICLES IS CHOSEN TO PRECIPITATE SUBSTANTIALLY ALL OF THE INTERFERING SUBSTACE FROM THE SAMPLE WIHTOUT REMOVING SUBSTANTIALLY ANY OF THE PARTICULAR CONSTITUENT. NORMALLY AT LEAST ONE REAGENT REACTIVE WITH THE PARTICULAR CONSTITUENT MUST BE INTRODUCED INTO THE LIQUID SAMPLE BEFORE THE DETERMINATION IS MADE.

Inventors

  • 👤 T Adams
  • 👤 W Miller

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-26 21:22
CPC Classifications
G; G01; G01N; G01N1/00; G01N1/28; G01N1/40; G01N1/405; Y; Y10; Y10T; Y10T436/00; Y10T436/25; Y10T436/25125

Claims Analysis

Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.

References Cited (Backward Citations)

No citation records indexed.

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1977-02-25 1977-08-27 1978-02-26 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1981-02-25 1981-08-27 1982-02-26 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1985-02-25 1985-08-27 1986-02-26 $7700.00 Window Closed / Lapsed

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag