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US4333263A Expired / Lapsed US ⏱️ 0.0 years remaining

Algal turf scrubber

Assignee: Smithsonian Institution
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Filing: 1980-10-07
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Granted: 1982-06-08
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Expires: 2000-10-07
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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 07:30
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.

References Cited (Backward Citations)

US2983076A Cited
US3402506A Cited
US3691737A Cited
US3768200A Cited
US4209943A Cited
US4236349A Cited
US4235043A Cited
SU743644A1 Cited
US4259828A Cited

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

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