← Back to Patent Explorer
US2723231A Expired / Lapsed US ⏱️ 0.0 years remaining

Sewage treatment

Assignee: Dorr Oliver Inc
•
Filing: 1952-04-08
•
Granted: 1955-11-08
•
Expires: 1972-04-08
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

No abstract record available.

Inventors

  • 👤 Robert P Logan
  • 👤 Anthony J Fischer

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-02 14:32
CPC Classifications
C; C02; C02F; C02F3/00; C02F3/02; C02F3/12; C02F3/1205; C02F3/1215; C02F3/121; Y; Y02; Y02W; Y02W10/00; Y02W10/10

Claims Analysis

Total Claims: 2
Claim 1
Independent Claim 281 words
THE CONTINOUS PROCESS OF PURIGANICALLY POLLUTED LIQUIDS SUCH AS RAW SEWAGE AND THE LIKE BY MEANS OF BIOLOGIC AEROBIC TREATMENT, WHICH COMPRISES ESTABLISHING AND MAINTAINING AN UPFLOWING STREAM OF SEWAGE A SLUDGE BLANKET ZONE OF SEWAGE SOLIDS IN MOTION IN THE BLANKET AND WITH THE BLANKET OVERLAIN BY A LAYER OF CLARIFIED LIQUOR FROM WHICH SUCH LIQUOR OVERFLOWS; WITHDRAWING SLUDGE FROM SAID BLANKET AT A CONTROLLED RATE AND SUBJECTING A QUANTITY THEREOF TO BIOLOGIC AEROBIC TREATMENT BY DETENTION IN A POOL CONTINUOUSLY PROVIDING A BIO-CHEMICAL TREATMENT ZONE WITH AEROBIC ORGANISMS ACTIVE THEREIN IN SUFFICIENT QUANTITY, SUFFICIENTLY LONG, AND SUFFICIENTLY OXYGENATED TO HAVE A SIGNIFICANT QUANTITY OF ORGANIC SEWAGE MATTER CONVERTED INTO BIOLOGIC FLOC STRUCTURES POTENTIALLY ABSORPTION AND ADSORPTIVE WITH RESPECT TO DISSOLVED AND COLLODIAL MATTER AS WELL AS ADAPTED TO ENTRAP AND ENTANGLE SUSPENDED MATTER CONTAINED IN THE SEWAGE; RECYCLING A SIGNIFICANT QUANTITY OF SUCH FLOC STRUCTURES TO SAID BLANKET TO INTERMINGLE WITH SEWAGE CONTINOSTRUCTURES TO SAID BLANKET BLANKET WHEREBY SUCH FLOC STRUCTURES ABSORB AND ADSORB QUANTITIES OF SAID DISSOLVED AND COLLODIAL SEWAGE MATTER TO FORM COMPOSITE FLOC STRUCTURES WHILE ENTRAPPING A QUANTITY OF SAID SUSPENDED SEWAGE MATTER, WHEREBY SAID SLUDGE BLANKET ZONE ACTS AS A BIO-PHYSICAL TREATMENT ZONE WITH RESPECT TO THE FORMATION OF SUCH COMPOSITE FLOC STRUCTURES AND AS DISTINCT FROM THE FUNCTION OF SAID BIO-CHEMICAL TREATMENT ZONE, WITH A SIGNIFICANT QUANTITY OF SUCH COMPOSITE FLOC STRUCTURES CARRYING WITH THEM AND BETWEEN THEM A QUANTITY OF RAW SEWQAGE SOLIDS CONTAINED IN SAID SLUDGE THAT IS BEING WITHDRAWN FROM SAID BLANKET ZONE FOR TREATMENT IN SAID BIO-CHEMICAL ZONE; AND DIVERTING A QUANTITY OF SLUDGE CONTAINING SAID COMPOSITE FLOC STRUCTURES FROM SAID BLANKET ZONE TO AN OUTSIDE PLACE FOR FURTHER DISPOSAL.
Claim 2
Dependent Claim 281 words
THE CONTINOUS PROCESS OF PURIGANICALLY POLLUTED LIQUIDS SUCH AS RAW SEWAGE AND THE LIKE BY MEANS OF BIOLOGIC AEROBIC TREATMENT, WHICH COMPRISES ESTABLISHING AND MAINTAINING AN UPFLOWING STREAM OF SEWAGE A SLUDGE BLANKET ZONE OF SEWAGE SOLIDS IN MOTION IN THE BLANKET AND WITH THE BLANKET OVERLAIN BY A LAYER OF CLARIFIED LIQUOR FROM WHICH SUCH LIQUOR OVERFLOWS; WITHDRAWING SLUDGE FROM SAID BLANKET AT A CONTROLLED RATE AND SUBJECTING A QUANTITY THEREOF TO BIOLOGIC AEROBIC TREATMENT BY DETENTION IN A POOL CONTINUOUSLY PROVIDING A BIO-CHEMICAL TREATMENT ZONE WITH AEROBIC ORGANISMS ACTIVE THEREIN IN SUFFICIENT QUANTITY, SUFFICIENTLY LONG, AND SUFFICIENTLY OXYGENATED TO HAVE A SIGNIFICANT QUANTITY OF ORGANIC SEWAGE MATTER CONVERTED INTO BIOLOGIC FLOC STRUCTURES POTENTIALLY ABSORPTION AND ADSORPTIVE WITH RESPECT TO DISSOLVED AND COLLODIAL MATTER AS WELL AS ADAPTED TO ENTRAP AND ENTANGLE SUSPENDED MATTER CONTAINED IN THE SEWAGE; RECYCLING A SIGNIFICANT QUANTITY OF SUCH FLOC STRUCTURES TO SAID BLANKET TO INTERMINGLE WITH SEWAGE CONTINOSTRUCTURES TO SAID BLANKET BLANKET WHEREBY SUCH FLOC STRUCTURES ABSORB AND ADSORB QUANTITIES OF SAID DISSOLVED AND COLLODIAL SEWAGE MATTER TO FORM COMPOSITE FLOC STRUCTURES WHILE ENTRAPPING A QUANTITY OF SAID SUSPENDED SEWAGE MATTER, WHEREBY SAID SLUDGE BLANKET ZONE ACTS AS A BIO-PHYSICAL TREATMENT ZONE WITH RESPECT TO THE FORMATION OF SUCH COMPOSITE FLOC STRUCTURES AND AS DISTINCT FROM THE FUNCTION OF SAID BIO-CHEMICAL TREATMENT ZONE, WITH A SIGNIFICANT QUANTITY OF SUCH COMPOSITE FLOC STRUCTURES CARRYING WITH THEM AND BETWEEN THEM A QUANTITY OF RAW SEWQAGE SOLIDS CONTAINED IN SAID SLUDGE THAT IS BEING WITHDRAWN FROM SAID BLANKET ZONE FOR TREATMENT IN SAID BIO-CHEMICAL ZONE; AND DIVERTING A QUANTITY OF SLUDGE CONTAINING SAID COMPOSITE FLOC STRUCTURES FROM SAID BLANKET ZONE TO AN OUTSIDE PLACE FOR FURTHER DISPOSAL.

References Cited (Backward Citations)

US2168208A Cited
US2382490A Cited
US2355760A Cited
US2517792A Cited
US2492486A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1958-11-07 1959-05-09 1959-11-08 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1962-11-07 1963-05-09 1963-11-08 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1966-11-07 1967-05-09 1967-11-08 $7700.00 Window Closed / Lapsed

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag