Patent US3929630A successfully refreshed from Google Patents.
US3929630A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for biochemical reactions
Assignee: Gary Aircraft Corp
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Filing: 1974-02-22
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Granted: 1975-12-30
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Expires: 1994-02-22
Abstract
Abstract A process for carrying out a biochemical reaction by introducing reactants to the surface of a rigid, porous and absorbent silica foam substrate. Structure of the inorganic foam maintains optimum moisture and environmental conditions required for bacterial growth for biochemical reactions under both aerobic and anerobic conditions. Consequently, the invention provides means for treating water, effluent, sewage as well as for fermenting liquids containing carbohydrates.
Inventors
- 👤 Pat E Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:00
CPC Classifications
C; C02; C02F; C02F3/00; C02F3/34; B; B01; B01J; B01J16/00; C02F3/02; C02F3/10; G; G01; G01N; G01N1/00; G01N1/28; G01N1/2813; G01N2001/2833; Y; Y02; Y02W; Y02W10/00; Y02W10/10
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
72 words
A PROCESS FOR REDUCING THE BOD OF A WASTE WATER STREAM COMPRISING INTRODUCING THE STREAM TO A BED OF SHAPED, POROUS AND ADSORBENT SILICA SUBSTRATE, THE SILICA SUBSTRATE HAVING BEEN FORMED BY GELLING AND SUBSQUENT LEACHING OF A SOLUBLE ALKALI METAL SILICATE SELECTED FROM THE GROUP CONSISTING OF SODIUM AND POTASSIUM SILICATES TO PROVIDE A POROUS, INSOLUBLE SILICA, THE PORES OF WHICH ARE OF SIZES FROM ABOUT 100 TO ABOUT 800 MICRONS.
Claim 2
Dependent Claim
72 words
A PROCESS FOR REDUCING THE BOD OF A WASTE WATER STREAM COMPRISING INTRODUCING THE STREAM TO A BED OF SHAPED, POROUS AND ADSORBENT SILICA SUBSTRATE, THE SILICA SUBSTRATE HAVING BEEN FORMED BY GELLING AND SUBSQUENT LEACHING OF A SOLUBLE ALKALI METAL SILICATE SELECTED FROM THE GROUP CONSISTING OF SODIUM AND POTASSIUM SILICATES TO PROVIDE A POROUS, INSOLUBLE SILICA, THE PORES OF WHICH ARE OF SIZES FROM ABOUT 100 TO ABOUT 800 MICRONS.
Claim 3
Dependent Claim
27 words
The process of claim 1 wherein the stream introduced to the bed of silica substrate undergoes a reaction which is one of aerobic, anerobic or facultative reactions.
Claim 4
Dependent Claim
18 words
The process of claim 1 wherein the stream introduced to the silica substrate undergoes a biochemical oxidation-reduction reaction.
Claim 5
Dependent Claim
92 words
A process for reducing the BOD of a waste water stream comprising, a. passing the stream downwardly through a bed of shaped and adsorbent silica substrate, the silica substrate having been formed by gelling and subsequent leaching of a soluble alkali metal silicate selected from the group consisting of sodium and potassium silicates to provide a porous, insoluble silica, the pores of which are of sizes from about 100 to about 800 microns, and b. introducing oxygen to said bed whereby the organic content of the stream being treated is biologically oxidized.
Claim 6
Dependent Claim
92 words
A process for reducing the BOD of a waste water stream comprising, a. passing the stream downwardly through a bed of shaped and adsorbent silica substrate, the silica substrate having been formed by gelling and subsequent leaching of a soluble alkali metal silicate selected from the group consisting of sodium and potassium silicates to provide a porous, insoluble silica, the pores of which are of sizes from about 100 to about 800 microns, and b. introducing oxygen to said bed whereby the organic content of the stream being treated is biologically oxidized.
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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) | 1978-12-29 | 1979-06-30 | 1979-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-29 | 1983-06-30 | 1983-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-29 | 1987-06-30 | 1987-12-30 | $7700.00 | Window Closed / Lapsed |