US3617541A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Biogrid unit and method
Assignee: Fairbanks Morse Inc
•
Filing: 1969-07-29
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Granted: 1971-11-02
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Expires: 1989-07-29
Abstract
Abstract A sewage treatment unit comprising an open-ended tank including therein a series of spaced substantially vertically disposed permeable fabric members supported in the tank for oscillating movement, the surfaces of each of the members providing such growth areas for biological masses and aeration means for supplying oxygen to the biological masses to facilitate biological oxidation of the sewage in the tank.
Inventors
- 👤 Pei Tai Pan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:52
CPC Classifications
C; C02; C02F; C02F3/00; C02F3/02; C02F3/06; C02F3/10; C02F3/103; Y; Y02; Y02W; Y02W10/00; Y02W10/10
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
17 words
A sewage treatment unit according to claim 1 wherein said members are of corrosion resistant fabric material.
Claim 2
Dependent Claim
14 words
A sewage treatment unit according to claim 2 wherein said material is fiber glass.
Claim 3
Dependent Claim
22 words
A sewage treatment unit according to claim 1 wherein said members are supported within said tank as to have freedom to sway.
Claim 4
Dependent Claim
59 words
A sewage treatment unit according to claim 1 wherein said members are supported within said tank as to have freedom to sway, and wherein air is supplied to the tank to supply oxygen to the biological digestion process taking place on said members while simultaneously causing said members to have relative swaying movement under force exerted by said air.
Claim 5
Dependent Claim
62 words
A sewage treatment unit according to claim 1, including a tray disposed adjacent the top of said tank, said tray including a plurality of troughs extending horizontally across said tank and in parallel relationship with respect to one another, each of said troughs including a plurality of openings therein disposed downwardly in use for distributing a quantity of liquid in said tank.
Claim 6
Independent Claim
153 words
The method of treating sewage by biological oxidation including the steps of providing a tank having a bottom wall and sidewalls and including a liquid outlet in at least one of said sidewalls, distributing a liquid containing sewage material into the tank and having a predetermined minimum low level of liquid content in the tank, contacting a series of transverse permeable panels having capillary action characteristics with said sewage material entering said tank, the surfaces of said panels providing growth areas for biological masses which digest solids in said sewage and reduce the BOD content thereof, while the lower end of each of said panels is submerged in said predetermined minimum low level of liquid content, permitting oscillation of said panels in response to the movement of the flow of liquid in said tank, and aerating said biological masses with aeration means to facilitate biological oxidation of the sewage contained in said tank.
Claim 7
Dependent Claim
15 words
The method of claim 7 wherein said panels are substantially vertically extending in said tank.
Claim 8
Dependent Claim
20 words
The method of claim 8 wherein said liquid and sewage material is introduced into said tank adjacent the top thereof.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-01 | 1975-05-03 | 1975-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-01 | 1979-05-03 | 1979-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-01 | 1983-05-03 | 1983-11-02 | $7700.00 | Window Closed / Lapsed |