US3650068A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for growing algae
Assignee: IFP Energies nouvelles
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Filing: 1969-06-26
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Granted: 1972-03-21
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Expires: 1989-06-26
Abstract
Abstract In the open air cultivation of algae, natural brackish water is employed as make-up water instead of softened water. The culture medium is discharged at a rate sufficient to maintain the saline concentration therein at a predetermined concentration compatible with the growth of the algae. The make-up water must have a saline concentration lower than that of the culture medium, preferably at least 10 percent lower.
Inventors
- 👤 Colette Meyer
- 👤 Michel Rebeller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:32
CPC Classifications
A; A01; A01G; A01G33/00; Y; Y02; Y02A; Y02A40/00; Y02A40/10; Y02A40/22; Y02A40/80; Y10; Y10S; Y10S435/00; Y10S435/813; Y10S435/8215; Y10S435/946
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
33 words
A process according to claim 1, wherein the concentration of dissolved salts of the makeup water is at least 10 percent lower than the predetermined concentration of dissolved salts of the culture medium.
Claim 2
Dependent Claim
25 words
A process according to claim 2, wherein the added saline makeup water has a concentration of dissolved salts between 0.5 and 30 g. per liter.
Claim 3
Dependent Claim
46 words
A process according to claim 1, wherein at least a part of the nutritive elements consumed by the algae and withdrawn with the purge are provided to the culture medium when the addition of saline makeup water does not compensate for the losses of these elements.
Claim 4
Dependent Claim
14 words
A process according to claim 1, wherein the algae are of the Spirulina genus.
Claim 5
Dependent Claim
16 words
A process as defined by claim 1, wherein said aqueous culture medium has a basic pH.
Claim 6
Dependent Claim
42 words
A process as defined by claim 6, wherein the concentration of makeup water is at least 10 percent lower than predetermined concentration of dissolved salts of the culture medium, and the said predetermined concentration is between 15 and 60 g. per liter.
Claim 7
Dependent Claim
25 words
A process as defined by claim 1, wherein the saline makeup water has a concentration of dissolved salts between two and 30 g. per liter.
Claim 8
Dependent Claim
42 words
A process as defined by claim 8, wherein the concentration of makeup water is at least 10 percent lower than predetermined concentration of dissolved salts of the culture medium, and the said predetermined concentration is between 15 and 60 g. per liter.
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) | 1975-03-21 | 1975-09-20 | 1976-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-21 | 1979-09-20 | 1980-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-21 | 1983-09-20 | 1984-03-21 | $7700.00 | Window Closed / Lapsed |