# US 8,541,439 B2 · Formable aquatic coverings for preventing biofouling > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,541,439 B2 - Document ID: US8541439B2 - Status: Granted - Kind: B2 - Application number: 13/177,098 - Filed: 2011-07-06 - Published: 2012-01-12 - Granted: 2013-09-24 - Earliest claimed: 2010-07-06 - Assignees: Biofouling Sloutions, Inc. - Applicants: Fletcher Eyster; Fred Zucker - Inventors: Fletcher Eyster; Fred Zucker - Web page: https://patentgrep.com/patent/US8541439B2 ## CPC - A01N 25/34: Shaped forms, e.g. sheets, not provided for in any other sub-group of this main group - B63B 59/04: Preventing hull fouling (anti-fouling paints C09D5/16) - C07D 498/18: Bridged systems - E02B 17/0017: {Means for protecting offshore constructions} - B63B 59/045: {by wrapping the submerged hull or part of the hull with an impermeable sheet (stopping temporarily leaks in hulls with impermeable sheets B63B43/16)} - B63B 2017/0045: {Caps, hoods, or the like devices for protective purposes, not otherwise provided for} - B63H 20/36: Transporting or testing stands {(hand carts for transporting outboard units B62B; measuring torque G01L3/00, measuring thrust of propellers G01L5/133, testing in general G01M); Use of outboard propulsion units as pumps}; Protection of power legs {, e.g. when not in use} - A01N: PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF (preservation of food or foodstuff A23); BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES (preparations for medical, dental or toiletry purposes which kill or prevent the growth or proliferation of unwanted organisms A61K); PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS - B63B: SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING (arrangements of vessel ventilation, heating, cooling, or air-conditioning B63J2/00; floating substructures as supports of dredgers or soil-shifting machines E02F9/06) - C07D: HETEROCYCLIC COMPOUNDS (macromolecular compounds C08) - E02B: HYDRAULIC ENGINEERING (ship-lifting E02C; dredging E02F) - B63H: MARINE PROPULSION OR STEERING (propulsion of air-cushion vehicles B60V1/14; specially adapted for submarines, other than nuclear propulsion, B63G; specially adapted for torpedoes F42B19/00) ## Abstract The instant invention describes an anti-biofouling structure for placement onto structures or surfaces that are exposed to aquatic environments. Embedded within the anti-biofouling structure are agents that can diffuse out of the structure and prevent the formation and/or accumulation of plant and animal species build-up that creates biofouling. The instant invention also describes a system for preventing biofouling of an object stored in an aquatic environment which includes the anti-biofouling structure, and a protective cover element constructed and arranged to fit various structures, such as boat propellers. ## Claims ### Claim 1 An anti-biofouling structure for placement onto an object exposed to aquatic environments comprising: a pliable sheet material formed from a plurality of interwoven fibers to form a lattice-like configuration for securing to said object, said pliable sheet material being fenestrated to allow passage of at least some of said aquatic environment therethrough, said pliable sheet material including at least one anti-biofouling agent embedded within said pliable sheet material, said biofouling agent comprising rapamycin, whereby said pliable sheet material is securable about said object to reduce the formation of biofouling organisms along the surface of said object. ### Claim 2 (depends on 1) The anti-biofouling structure for placement onto an object exposed to aquatic environments according to claim 1 wherein said anti-biofouling agent is microencapsulated. ### Claim 3 (depends on 1) The anti-biofouling structure for placement onto an object exposed to aquatic environments according to claim 1 wherein said anti-biofouling agent is adapted to substantially kill bio-fouling organisms passing through said fenestrations. ### Claim 4 (depends on 1) The anti-biofouling structure for placement onto an object exposed to aquatic environments according to claim 1 wherein said anti-biofouling agent is embedded into a binder and coated onto said pliable sheet material. ### Claim 5 (depends on 4) The anti-biofouling structure for placement onto an object exposed to aquatic environments according to claim 4 wherein said pliable sheet material is in the form of a mesh. ### Claim 6 (depends on 1) The anti-biofouling structure for placement onto an object exposed to aquatic environments according to claim 1 wherein said pliable sheet material includes at least one securing member. ### Claim 7 (depends on 1) The anti-biofouling structure for placement onto an object exposed to aquatic environments according to claim 1 wherein said pliable sheet material is formed into a bag shaped to enclose one or more blades of a boat propeller, to reduce formation of biofouling on an outer surface of said blades. ### Claim 8 (depends on 7) The anti-biofouling structure for placement onto an object exposed to aquatic environments according to claim 7 wherein said pliable sheet material is biodegradable. ### Claim 9 (depends on 7) The anti-biofouling structure for placement onto an object exposed to aquatic environments according to claim 7 wherein said pliable sheet material is made of a natural fiber, synthetic fiber, plastics, or combinations thereof. ### Claim 10 A system for reducing biofouling of objects which are exposed to aquatic environments comprising: a bag cover formed from a pliable fenestrated sheet material having one or more anti-biofouling agents embedded therein, said biofouling agent comprising rapamycin, said cover having a plate member front surface, an expandable body portion being secured thereto and traversable between a first position and a second expanded position, an interior portion sized and shaped to enclose an object which is exposed to an aquatic environment, and one or more securing members for securing said cover to said object. ### Claim 11 (depends on 10) The system for reducing biofouling of objects which are exposed to aquatic environments according to claim 10 wherein said cover is secured to a securing cable, whereby applying a force to said securing cable results in releasing said securing members and removal of said cover from said object. ### Claim 12 (depends on 11) The system for reducing biofouling of objects which are exposed to aquatic environments according to claim 11 wherein said securing cable contains two additional cables, said additional cables being separated by a predetermined distance. ### Claim 13 (depends on 12) The system for reducing biofouling of objects which are exposed to aquatic environments according to claim 12 wherein said cables are attached to said cover through use of a guide tube. ### Claim 14 (depends on 13) The system for reducing biofouling of objects which are exposed to aquatic environments according to claim 13 wherein one of said additional cables is coiled. ### Claim 15 (depends on 14) The system for reducing biofouling of objects which are exposed to aquatic environments according to claim 14 wherein said object is a propeller. ### Claim 16 (depends on 10) The system for reducing biofouling of objects which are exposed to aquatic environments according to claim 10 wherein said anti bio-fouling agent is microencapsulated for timed release of said anti bio-fouling agent. ### Claim 17 A system for reducing biofouling of objects which are exposed to aquatic environments comprising: a cover assembly, said cover assembly containing a first face member connected to a second face member with a woven sheet material, said woven sheet material containing an anti-biofouling agent embedded therein, said biofouling agent comprising rapamycin, an interior portion of said cover assembly sized and shaped to receive a boat propeller, said second face member containing a slitted portion terminating in an opening, said opening sized and shaped to receive a shaft of said propeller, said first face member and said second face member each including a first part of a hook and loop fastener, a strap assembly, said strap assembly including a second part of a hook and loop fastener, said second part of said hook and loop fastener removably securable to said first part of said hook and loop fastener on said first face member and said second face member to secure said cover assembly in a closed position, said strap assembly having sufficient length to extend from said propeller to a position within the watercraft to which said propeller is secured. ### Claim 18 (depends on 17) The system for reducing biofouling of objects which are exposed to aquatic environments according to claim 17 wherein said strap assembly further is coupled to one or more cables whereby applying a force to said cables removes said strap assembly from said first part of a hook and loop fastener. ### Claim 19 (depends on 17) The system for reducing biofouling of objects which are exposed to aquatic environments according to claim 17 wherein said cover assembly is constructed from cotton, plastic, or combinations thereof. ### Claim 20 (depends on 17) The system for reducing biofouling of objects which are exposed to aquatic environments according to claim 17 further comprising a formable mesh sheet covering material for securing to at least one blade of said propeller, said formable mesh sheet covering material containing at least one anti-biofouling agent embedded therein.