US4333263A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Algal turf scrubber
Assignee: Smithsonian Institution
•
Filing: 1980-10-07
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Granted: 1982-06-08
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Expires: 2000-10-07
Abstract
Abstract A method of producing an algal turf for use as a scrubber of carbon dioxide, nutrients and pollutants as well as biomass production is disclosed. A growing surface for spores or benthic microalgae is provided on a water surface. The growing surface is subjected to periodic water surge action to promote metabolite cellular-ambient water exchange and light is provided, natural or artificial to promote growth. The growing turf is harvested before being overgrown by larger macroalgae.
Inventors
- 👤 Walter H. Adey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 00:45
CPC Classifications
A; A01; A01K; A01K63/00; A01K63/04; A01G; A01G7/00
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
103 words
A method of producing an algal turf comprising the steps of: providing spores of benthic microalgae, providing a growing surface for spores of benthic microalgae, subjecting the growing surface to light to grow a benthic algal turf on said surface, subjecting the benthic microalgae on the growing surface to water surge motion to promote metabolite cellular-ambient water exchange and control the light reception on the turf so that said turf receives substantially uniform illumination, and periodically harvesting said benthic microalgae algal turf growing on said surface to remove a portion of the algae growing thereon prior to said turf being overgrown by macroalgae.
Claim 2
Independent Claim
103 words
A method of producing an algal turf comprising the steps of: providing spores of benthic microalgae, providing a growing surface for spores of benthic microalgae, subjecting the growing surface to light to grow a benthic algal turf on said surface, subjecting the benthic microalgae on the growing surface to water surge motion to promote metabolite cellular-ambient water exchange and control the light reception on the turf so that said turf receives substantially uniform illumination, and periodically harvesting said benthic microalgae algal turf growing on said surface to remove a portion of the algae growing thereon prior to said turf being overgrown by macroalgae.
Claim 3
Dependent Claim
21 words
The method of claim 1 wherein in said harvesting step, filamentous bases of said algae remain on said surface following harvesting.
Claim 4
Independent Claim
45 words
The method of claims 1 or 2 wherein said benthic microalgae are selected from the group consisting of: ______________________________________
Green algae
Brown algae
Red algae Blue-green algae
______________________________________
Bryopsis Sphacelaria
Jania Oscillatoria
Derbesia Giffordia Amphiroa Schizothrix
Centroceras Calothrix
Polysiphonia
Microcoleus
Gelidiella
Ceramium
Herposiphonia
Lophosiphonia
______________________________________
Claim 5
Independent Claim
26 words
The method of claims 1 or 2 wherein said growing surface comprises a porous mat having pore sizes in the range of 0.5 to 5.0 mm.
Claim 6
Dependent Claim
15 words
The method of claim 4 wherein said porous mat is a plastic glass roving screen.
Claim 7
Independent Claim
53 words
The method of claims 1 or 2 further comprising the step of placing said growing surface on a water surface in a controlled environment and the step of providing water surge motion comprises the steps of periodically filling and emptying a water storage vessel to create surface wave motion in said controlled environment.
Claim 8
Independent Claim
44 words
The method of claims 1 or 2 wherein said benthic microalgae are selected from the group consisting of: __________________________________________________________________________
Green algae
Brown algae
Red algae
Blue-green algae
Diatoms
__________________________________________________________________________
Enteromorpha
Ectocarpus
Acrohaetium
Oscillatoria
Licmophora
Ulva Giffordia
Ceramium
Calothrix
Melosira
Chaetomorpha
Scytosiphon
Polysiphonia
Cladophora
__________________________________________________________________________
Claim 9
Independent Claim
20 words
The method of claims 1 or 2 further comprising the step of placing said growing surface on the ocean surface.
Claim 10
Dependent Claim
44 words
The method of claim 7 wherein said step of periodically harvesting comprises the steps of placing said growing surface on a harvesting platform, removing algal turf growth and storing said removed growth on said platform and replacing said growing surface on the ocean surface.
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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) | 1985-06-07 | 1985-12-07 | 1986-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-06-07 | 1989-12-07 | 1990-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-06-07 | 1993-12-07 | 1994-06-08 | $7700.00 | Window Closed / Lapsed |