US3889418A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High density treatment product
Assignee: American Bioculture Inc
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Filing: 1974-04-25
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Granted: 1975-06-17
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Expires: 1994-04-25
Abstract
Abstract Method of preparation and application of algal products is disclosed. By harvesting green algae, especially Chlorella pyrenoidosa during logarithmic phase of growth and after a cell density of 1 X 105 cells/ml is reached, a product having floccilating capability and plant growth regulating properties is obtained. Methods of handling this product and of application are disclosed.
Inventors
- 👤 Kenneth E Porter
- 👤 Perry L Nelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 03:16
CPC Classifications
A; A01; A01G; A01G33/00; C; C02; C02F; C02F3/00; C02F3/32; Y; Y02; Y02A; Y02A40/00; Y02A40/80; Y02W; Y02W10/00; Y02W10/30; Y02W10/37; Y10; Y10S; Y10S435/00; Y10S435/8215; Y10S435/946; Y10S47/00; Y10S47/10
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
83 words
A METHOD OF PRODUCING ALGAL PRODUCTS HAVING PROPERTIES USEFUL FOR THE TREATMENT OF MATERIAL SUCH AS SOIL AND WASTE WATER WHICH COMPRISES CULTURING GREEN ALGAE IN AN AQUEOUS NUTRIENT MEDIUM IN THE PRESENCE OF LIGHT AND CARBON DIOXIDE AND AT A TEMPERATURE OF BETWEEN ABOUT 20*C AND ABOUT 30*C, HARVESTING THE CULTURE BEFORE THE END OF LOGARITHMIC GROWTH AFTER THE POPULATION DENSITY OF THE CELLS IS AT LEAST 10**5 CELLS PER MILLILITER AND APPLYING THE HARVESTED CULTURE TO THE MATERIAL TO BE TREATED.
Claim 2
Independent Claim
83 words
A METHOD OF PRODUCING ALGAL PRODUCTS HAVING PROPERTIES USEFUL FOR THE TREATMENT OF MATERIAL SUCH AS SOIL AND WASTE WATER WHICH COMPRISES CULTURING GREEN ALGAE IN AN AQUEOUS NUTRIENT MEDIUM IN THE PRESENCE OF LIGHT AND CARBON DIOXIDE AND AT A TEMPERATURE OF BETWEEN ABOUT 20*C AND ABOUT 30*C, HARVESTING THE CULTURE BEFORE THE END OF LOGARITHMIC GROWTH AFTER THE POPULATION DENSITY OF THE CELLS IS AT LEAST 10**5 CELLS PER MILLILITER AND APPLYING THE HARVESTED CULTURE TO THE MATERIAL TO BE TREATED.
Claim 3
Dependent Claim
15 words
A method according to claim 1 in which the material to be treated is soil.
Claim 4
Dependent Claim
21 words
A method accordinG to claim 2 wherein the dosage rate is between about 1.1 X 1010 and 1.5 X 1011 cells/acre.
Claim 5
Dependent Claim
16 words
A method according to claim 1, further comprising shielding the harvested culture from light until use.
Claim 6
Dependent Claim
15 words
A method according to claim 1 wherein the material to be treated is waste water.
Claim 7
Dependent Claim
20 words
A method according to claim 5 wherein the product is applied when the waste water is in an aerobic condition.
Claim 8
Dependent Claim
17 words
A method according to claim 5 wherein the dosage rate is about 1 part per 1,000 parts.
Claim 9
Dependent Claim
20 words
A method according to claim 1 wherein the culture is harvested when the cell count exceeds 107 cells per milliliter.
Claim 10
Dependent Claim
12 words
A method according to claim 1 wherein the algae is Chlorella pyrenoidosa.
Claim 11
Independent Claim
128 words
A method of producing products having properties useful for the treatment of material such as soil and waste water which comprises culturing Chlorella in an aqueous nutrient medium in the presence of light and carbon dioxide, and at moderate temperatures, harvesting the culture during the logarithmic stage of growth when the population density reaches at least 105 cells per milliliter, transferring a portion of the culture to a pool at the site of use and adding the culture to the pool until the population density of the pool is at least 5 X 104 cells per milliliter, adding nutrient supplement to the pool harvesting the culture when the cell density reaches at least 105 cells per milliliter and applying the harvested culture to the material to be treated.
Claim 12
Independent Claim
128 words
A method of producing products having properties useful for the treatment of material such as soil and waste water which comprises culturing Chlorella in an aqueous nutrient medium in the presence of light and carbon dioxide, and at moderate temperatures, harvesting the culture during the logarithmic stage of growth when the population density reaches at least 105 cells per milliliter, transferring a portion of the culture to a pool at the site of use and adding the culture to the pool until the population density of the pool is at least 5 X 104 cells per milliliter, adding nutrient supplement to the pool harvesting the culture when the cell density reaches at least 105 cells per milliliter and applying the harvested culture to the material to be treated.
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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) | 1978-06-16 | 1978-12-16 | 1979-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-16 | 1982-12-16 | 1983-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-16 | 1986-12-16 | 1987-06-17 | $7700.00 | Window Closed / Lapsed |