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US3763824A Expired / Lapsed US ⏱️ 0.0 years remaining

System for growing aquatic organisms

Assignee: 3M Co
•
Filing: 1971-11-30
•
Granted: 1973-10-09
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Expires: 1991-11-30
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Abstract

Abstract A controlled, compatible, staged continuous-batch system for growing algae comprising a plurality of growing containers in series arranged in exponential progression such that each in the series is at least 30 percent larger than the preceding container. Conduit means between containers, a source of nutrient and, a source of water are provided. The system reduces the probability of extensive contamination, permits isolation of contamination, and is mathematically optimized to produce organisms at a minimal cost. Transfer of the algae occurs from one container to another when concentration of the algae in a first container reaches 106 to 107 cells/cm3, after which transfer from successive containers takes place when that concentration level is serially reached.

Inventors

  • 👤 D Schoon

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-05 19:59
CPC Classifications
A; A01; A01G; A01G33/00; C; C12; C12M; C12M21/00; C12M21/02; C12M23/00; C12M23/58; Y; Y02; Y02A; Y02A40/00; Y02A40/80

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 204 words
A controlled, compatible, staged continuous-batch system for growing and producing algae in an aquatic media, comprising: a plurality of growing containers in series arranged in a exponential progression of container volumes, such that each container in the series is a fixed volume ratio larger than each preceding container, each container being at least 30 percent larger than the preceding container; conduit means connecting said growing containers, such that a fixed percentage of the total container volume may be transferred from smaller container to larger container in the series; means to transfer said aquatic media from container to container through said conduit means; a source of nutrient for the algae; and a source of water having chemical and physical properties suitable for the growth of said algae; whereby, when the concentration of the algae in a first container reaches 106 to 107 cells/cm3 a portion of aquatic media containing said algae is transferred to the next larger container in thE series wherein the algae concentration again reaches said level, after which a fixed volume of algaecontaining aquatic media is transferred to the next largest container and so forth until the last container in the series wherein the algae may be removed for its intended use.
Claim 2
Dependent Claim 204 words
A controlled, compatible, staged continuous-batch system for growing and producing algae in an aquatic media, comprising: a plurality of growing containers in series arranged in a exponential progression of container volumes, such that each container in the series is a fixed volume ratio larger than each preceding container, each container being at least 30 percent larger than the preceding container; conduit means connecting said growing containers, such that a fixed percentage of the total container volume may be transferred from smaller container to larger container in the series; means to transfer said aquatic media from container to container through said conduit means; a source of nutrient for the algae; and a source of water having chemical and physical properties suitable for the growth of said algae; whereby, when the concentration of the algae in a first container reaches 106 to 107 cells/cm3 a portion of aquatic media containing said algae is transferred to the next larger container in thE series wherein the algae concentration again reaches said level, after which a fixed volume of algaecontaining aquatic media is transferred to the next largest container and so forth until the last container in the series wherein the algae may be removed for its intended use.
Claim 3
Dependent Claim 11 words
The system of claim 1 wherein said algae is C. nana.
Claim 4
Independent Claim 145 words
A method for growing C. nana algae in an aquatic medium to maturity and to a concentration suitable for feeding oysters, comprising continuously transferring said auqatic medium containing said algae at a concentration of 106 to 107 cells/cm.3 from a growing container to a next larger growing container of a series of containers arranged in an exponential volume progression with each container being at least 30 percent larger than the preceding container, and diluting said medium by addition thereto of further aquatic medium and nutrient while illuminating at about 200 lumens per gallon, maintaining the temperature within the range of 18* to 25* and aerating the medium at a rate of approximately 1 cubic foot of air per hour per gallon of medium; and removing said medium and algae at said concentration from the final one of said growing containers to an oyster feeding area.
Claim 5
Independent Claim 145 words
A method for growing C. nana algae in an aquatic medium to maturity and to a concentration suitable for feeding oysters, comprising continuously transferring said auqatic medium containing said algae at a concentration of 106 to 107 cells/cm.3 from a growing container to a next larger growing container of a series of containers arranged in an exponential volume progression with each container being at least 30 percent larger than the preceding container, and diluting said medium by addition thereto of further aquatic medium and nutrient while illuminating at about 200 lumens per gallon, maintaining the temperature within the range of 18* to 25* and aerating the medium at a rate of approximately 1 cubic foot of air per hour per gallon of medium; and removing said medium and algae at said concentration from the final one of said growing containers to an oyster feeding area.
Claim 6
Dependent Claim 65 words
Method of claim 3 wherein said nutrient comprises components as obtained by mixing, in the proportions indicated, the following materials: Na2SiO3.5H2O 6.00 X 10 2 gram/liter NaNO3 7.50 X 10 2 gram/liter NaH2PO4.5H2O 1.80 X 10 2 gram/liter Na-Fe Sequestrin (iron sequestering agent) 9.00 X 10 3 gram/liter MnCl2.4H2O 1.08 X 10 4 gram/liter ZnSO4.7H2O 1.32 X 10 5 gram/liter CoCl2.6H26.00 X 10 6 gram/liter

References Cited (Backward Citations)

US3196833A Cited
US3116712A Cited
US3473509A Cited
US3477406A Cited
US3573934A Cited
US3572291A Cited
US3658034A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1976-10-08 1977-04-09 1977-10-09 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1980-10-08 1981-04-09 1981-10-09 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1984-10-08 1985-04-09 1985-10-09 $7700.00 Window Closed / Lapsed

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