WO2002058748A1 - Tampon absorbant permettant de rendre les liquides dangereux non dangereux - Google Patents

Tampon absorbant permettant de rendre les liquides dangereux non dangereux Download PDF

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Publication number
WO2002058748A1
WO2002058748A1 PCT/GB2001/000336 GB0100336W WO02058748A1 WO 2002058748 A1 WO2002058748 A1 WO 2002058748A1 GB 0100336 W GB0100336 W GB 0100336W WO 02058748 A1 WO02058748 A1 WO 02058748A1
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WO
WIPO (PCT)
Prior art keywords
disinfecting
layer
absorbent
absorbent pad
reactant
Prior art date
Application number
PCT/GB2001/000336
Other languages
English (en)
Inventor
Ervin Dan
Original Assignee
Camelot Technologies Limited
Ritter, Stephen, David
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Camelot Technologies Limited, Ritter, Stephen, David filed Critical Camelot Technologies Limited
Priority to PCT/GB2001/000336 priority Critical patent/WO2002058748A1/fr
Publication of WO2002058748A1 publication Critical patent/WO2002058748A1/fr

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L15/00—Chemical aspects of, or use of materials for, bandages, dressings or absorbent pads
    • A61L15/16—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons
    • A61L15/42—Use of materials characterised by their function or physical properties
    • A61L15/46—Deodorants or malodour counteractants, e.g. to inhibit the formation of ammonia or bacteria
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N25/00—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests
    • A01N25/34—Shaped forms, e.g. sheets, not provided for in any other sub-group of this main group
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N59/00—Biocides, pest repellants or attractants, or plant growth regulators containing elements or inorganic compounds
    • A01N59/12—Iodine, e.g. iodophors; Compounds thereof
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L15/00—Chemical aspects of, or use of materials for, bandages, dressings or absorbent pads
    • A61L15/16—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons
    • A61L15/18—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons containing inorganic materials
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L15/00—Chemical aspects of, or use of materials for, bandages, dressings or absorbent pads
    • A61L15/16—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons
    • A61L15/42—Use of materials characterised by their function or physical properties
    • A61L15/44—Medicaments

Definitions

  • the present invention relates to an absorbent pad for rendering hazardous liquids non- hazardous.
  • an absorbent pad for rendering hazardous liquids non- hazardous.
  • fluids such as bodily fluids.
  • Such specimens present a potential hazard should the package in which they are contained leak and, for example, should the fluids contain infectious diseases.
  • a leak-proof secondary container which contains absorbent material, in the form of an absorbent pad for example, for absorbing the leaked fluid can be used.
  • Canadian Patent Application no. 2 191 928 discloses an absorbent composition which includes an absorbent and a mixture of chemicals (e.g.
  • the present invention provides an absorbent pad for rendering hazardous liquids non-hazardous comprising an absorbent layer having a first face and a second face and one or more liquid pervious disinfecting layers wherein at least one disinfecting layer is in contact with one of said first or said second faces and wherein said one or more disinfecting layers contain a mixture of reactant chemicals that are capable of reacting to release a disinfecting agent upon exposure to an activating liquid.
  • the mixture of reactant chemicals may be distributed in the one or more disinfecting layers so that one or more disinfecting layers may contain one type of reactant chemical or one or more disinfecting layers may contain a mixture of reactant chemicals.
  • At least one disinfecting layer contains a mixture of reactant chemicals.
  • the disinfecting layer can generate and expose the hazardous liquid to a disinfectant before the liquid comes into contact with the absorbent material.
  • the hazardous liquid comprises the activating liquid.
  • the absorbent pad comprises only one such disinfecting layer.
  • the absorbent pad comprises more than one liquid pervious disinfecting layer with the first disinfecting layer being in contact with one of the faces of the absorbent layer and the subsequent disinfecting layers being layered on top of said first disinfecting layer.
  • the hazardous liquid contains the activating liquid
  • the hazardous liquid will contact the outermost disinfecting layer first and permeate down through to the first disinfecting layer, carrying and intermixing the reactant chemicals on its way.
  • the reactant chemicals react generating a disinfecting agent.
  • the disinfecting agent renders the hazardous liquid non-hazardous before it passes through to the absorbent layer.
  • the present invention also provides for an absorbent pad which comprises more than one liquid pervious disinfecting layer with the first disinfecting layer being in contact with one of the faces of the absorbent layer and the subsequent disinfecting layers being layered on top of said first disinfecting layer wherein the mixture of reactant chemicals is distributed in the more than one disinfecting layer such that at least one disinfecting layer contains one type of reactant chemical only.
  • the advantages of this embodiment are that reactive chemicals can be separated into different disinfecting layers ensuring that the reactive chemicals do not prematurely react.
  • the number of disinfecting layers is equal to the number of reactant chemicals and the mixture of reactant chemicals is distributed such that each disinfecting layer contains one type of reactant chemical only.
  • the disinfecting layers for this embodiment are relatively simple to manufacture as they do not require the consideration of the relative distribution of the different types of reactant chemical that is necessary in a disinfecting layer containing a mixture of reactant chemicals.
  • the present invention also provides an absorbent pad comprising two liquid pervious disinfecting layers, the first disinfecting layer being in contact with a first face of an absorbent layer, the second disinfecting layer being in contact with a second face of the absorbent layer wherein the mixture of reactant chemicals is distributed such that each disinfecting layer contains one type of reactant chemical only.
  • This embodiment is particularly suited to the situation when there are first and second reactant chemicals, the second of which may interact unfavourably with the absorbent composition.
  • the hazardous liquid approaches the face of the absorbent pad in contact with a disinfectant layer containing the first reactant chemical. If the hazardous liquid contains the activating liquid, the hazardous liquid will permeate through said disinfectant layer, into the absorbent layer, carrying the first reactant chemical with it.
  • the first reactant chemical will intermix with the second reactant chemical when it has permeated through to the second disinfecting layer thus generating the disinfectant.
  • the first reactant chemical is potassium iodide and the second reactant chemical is cupric sulphate (hydrous or anhydrous).
  • the two faces and one or more of the sides of the absorbent pad may be in contact with disinfecting layers. This may be effected, for example, by joining two disinfectant layers each of which is in contact with an opposing face of the absorbent pad. This embodiment is particularly useful for thicker absorbent pads.
  • the present invention also provides an absorbent pad for rendering hazardous liquids non-hazardous comprising an absorbent layer having a first face and a second face which first face is coated with a first reactant chemical and which second face is coated with a second reactant chemical which first and second reactant chemicals that are capable of reacting to release a disinfecting agent upon exposure to an activating liquid.
  • the absorbent layer may be formed from any suitable absorbent material including wood pulp, cellulose fluff, rayon and tissue. Peat moss may also be used. In this connection reference is made to US 5 477 627, US 5 429 242, US 5 374 260, US 4 992 324, US 4 676 871, US 4 573 988, US 4 560 360, US 4 540 454, US 4 537 590 and US 4 226 237. Alginates are also suitable.
  • the absorbency of the core layer may be improved by additionally or alternatively including highly absorbent material such as that commonly known as "superabsorbent" polymers.
  • Superabsorbent polymers have an absorbency of more than or equal to 10 g of 0.9 % saline solution per g of superabsorbent polymer and it may even be as high as lOOg of 0.9 % saline solution per g of superabsorbent polymer.
  • an absorbent layer will contain about 10 to 25 % superabsorbent polymer. However, this will depend on the particular application of the absorbent pad.
  • a number of superabsorbent polymers have been developed which exhibit the capacity to be water-absorbing.
  • Known compositions may be in any suitable form including powders, particles and fibers.
  • the fibrous copolymers are rendered hydrophilic and water-swellable by reaction with ammonia or an alkali metal hydroxide.
  • the resultant lightly cross-linked copolymers are treated with ammonia or an aqueous or alcohol solution of an alkali metal hydroxide.
  • European Published Application No. 0268 498 (incorporated herein by reference) describes a water-absorbent composition formed by causing a substantially linear polymer of water-soluble ethylenically unsaturated monomer blends comprising carboxylic and hydroxylic monomers to cross-link internally.
  • Further examples of superabsorbent polymer compositions are those produced from a copolymer of an alpha beta unsaturated monomer having at least one pendant unit selected from a carboxylic acid group and derivatives thereof and a copolymerisable monomer. A proportion of the pendant units are present in the final copolymer as the free acid and a proportion as the salt of the acid.
  • copolymers are capable of being cross-linked, either internally or with a variety of cross-linking agents, to form the water-swellable composition.
  • water-swellable compositions of this type can be found in US 4, 616,063, 4 705,773, 4,731,067, 4,743, 244, 4,788,237, 4,813,945, 4,880,868 and 4, 892,533 and EP 0 272 074, 0 264208 and 0436 514 which are incorporated herein by reference.
  • carboxylic acid groups include carboxylic acid salt groups, carboxylic acid amide groups, carboxylic acid imide groups, carboxylic acid anydride groups and carboxylic acid ester groups.
  • water-absorbent polymers can be found in US 4,798,861, WO 93/17066, WO 93/255735, WO 93/24684, WO 93/12275, European Published Application Nos 0401 044, 0269393, 0326382, 0227305, 0 101 253, 0213 799, 0232 121, 0342919, 0233 014, 0 268 498 and 0 397 410, British Patent Application Nos 2 082 614, 2 022 505, 2270030, 2269602 and 2 126591, US PatentNos 4,418,163, 4,418,163, 3,989,586, 4, 332, 917, 4,338,417, 4,420,588 and 4,155,957 and French Patent ApplicationNo.2525 121 which are all incorporated herein by reference.
  • the superabsorbent materials of the kind referred to above may be in any suitable form including powder, particulate, granular and fibrous; the fibres may be straight or crimped. Details of curly/crimped fibres may be found in US 4,822,453, 4,888,453, 5,462,793 and 4,898,462.
  • the term "fibrous form" includes material in the form of fibres and in the form of filaments.
  • the absorbent layer contains superabsorbent polymer at least partially in fibrous form.
  • the absorbent layer may be produced by a variety of methods such as air-laying, wet- laying, needle-punching, hydroentanglement, spin interlacing by air or water and carding. These methods are suitable for producing an absorbent layer that is a woven web of fibrous material.
  • the absorbent layer may also be in non fibrous form.
  • the liquid pervious disinfecting layer serves to act as a temporary store for the reactant chemicals and to allow the hazardous liquid to permeate through it.
  • the disinfecting layer comprises at least one reactant chemical and a carrier material.
  • the carrier material comprises hydrophillic material or material that has a low water absorbency. Wood pulp, fluff, polyester, polypropylene or mixtures thereof are suitable materials.
  • the disinfecting layer may be made by methods similar to those used for forming the absorbent layer.
  • the first disinfecting layer is positioned in contact with the absorbent layer. This may be achieved by air-laying the first disinfecting layer on top of an already formed absorbent layer.
  • the first disinfecting layer may be bonded to the absorbent layer, for example, by the use of an adhesive or by needle-punching the two layers together.
  • the disinfecting layers themselves may be formed by air-laying one on top of an already preformed disinfecting layer and these layers may be bonded together by needle-punching. It is preferred that needle-punching is used as this tends to promote communication of the reactant chemicals.
  • the activating chemical is water. Generally this will dissolve the reactant chemicals, enabling them to intermix and react to form a disinfecting agent.
  • the disinfecting agent must be capable of rendering hazardous liquids non-hazardous.
  • the disinfecting agent is in gaseous form.
  • the reactant chemicals used depend upon the application. When the liquids to be absorbed are bodily fluids and, in particular, blood, it is preferred that iodine is the disinfecting agent.
  • the reactant chemicals are anhydrous cupric sulphate and potassium iodide. These react in the presence of water to produce iodine as the disinfecting agent.
  • the reactant chemicals are suitably in solid form. This makes them easier to incorporate into the disinfecting layers. Hydrous cupric sulphate in solid form may also be used. It is preferable to use hydrous cupric sulphate in the embodiment of invention in which the reactant chemicals are contained separately in different disinfecting layers.
  • the reactant chemicals may be applied to/incorporated into the disinfecting layer in the form of inks.
  • An example of a suitable process is described in the afore-mentioned Canadian patent application no. 2 201 825.
  • a further aspect of the present invention is particularly effective when the reactant chemicals are evenly distributed in the disinfecting layers. This results in an efficient use of the reactant chemicals. An uneven distribution results in the use of greater amounts of the reactant chemicals to produce an effective amount of disinfecting agent. It has been found that even more beneficial results may be obtained when the reactant chemicals are contained separately in different disinfecting layers and are evenly distributed in those layers. It is easier to get a more uniform distribution when the chemicals are dealt with separately, for when one works with the chemicals together there may be a problem with them reacting. There are various methods of getting an ideal uniform distribution when working with only one reactant chemical. A spun bonded manufacturing process in which the disinfecting chemical is put into the material as it is made may be used.
  • Another method is through an absorption process in which the reactant chemical is mixed with a diluent such as water and is then absorbed into a substrate material.
  • a diluent such as water
  • the diluent e.g. water
  • each of the two faces of the disinfecting layer is coated with a solution containing one of the reactant chemicals.
  • a different reactant chemical is applied to each face of the disinfecting layer in this way.
  • the solution may be aqueous.
  • the coated faces are then dried.
  • the absorbent pad comprises only one such layer.
  • each of the two faces of the disinfecting layer has a continuous coating of reactant chemical solution, i.e. is completely coated with said solution. This method is also applicable to the embodiment where each of the two faces of the absorbent layer is coated with a solution containing one of the reactant chemicals.
  • each of the two faces of the absorbent layer has a continuous coating of reactant chemical solution, i.e. is completely coated with said solution. If the intended application is such that the hazardous liquid might approach the absorbent pad towards either face, it is preferred that both faces are in contact with at least one disinfecting layer. However, where the hazardous liquid will only approach the absorbent pad from one direction, it is preferred that only one face is in contact with the at least one disinfecting layer and that the other face has a liquid impervious backing sheet to maintain containment of the liquid.
  • FIGURE 1 is a side elevation view in section of a first embodiment of absorbent pad constructed in accordance with the teachings of the present invention.
  • FIGURE 2 is a side elevation view in section of a second embodiment of absorbent pad constructed in accordance with the teachings of the present invention.
  • a first embodiment of absorbent pad for rendering hazardous liquids non-hazardous 10 includes an absorbent layer 14 having a first face 16 and a second face 18.
  • a liquid pervious disinfecting layer 20 is bonded by adhesive 22 to first face 16 of absorbent layer 14.
  • Disinfecting layer 20 contains an evenly distributed concentration of a first reactant chemical indicated by circles 24 and a second reactant chemical indicated by triangles 26.
  • Second reactant chemical 24 intermixes with first reactant chemical 26 when exposed to an activating liquid to release a disinfecting agent.
  • Second face 18 of absorbent layer 14 has a liquid impervious backing sheet 28.
  • first embodiment of absorbent pad 10 will now be described using a selected example in which the liquid to be sterilized is blood, first reactant chemical 24 is anhydrous cupric sulphate which has the chemical formula CuSO 4 , second reactant chemical 26 is potassium iodide which has the chemical formula KI, the activating liquid is water which is a component of the blood, and the disinfecting agent is elemental iodine which has the chemical formula I 2 .
  • first reactant chemical 24 is anhydrous cupric sulphate which has the chemical formula CuSO 4
  • second reactant chemical 26 is potassium iodide which has the chemical formula KI
  • the activating liquid is water which is a component of the blood
  • the disinfecting agent is elemental iodine which has the chemical formula I 2 .
  • an outer surface 30 of disinfecting layer 20 is exposed to the contaminated blood to be sterilized and adsorbed.
  • the blood penetrates outer surface 30 in a direction indicated by arrow 32.
  • Cupric sulphate 24 and potassium iodide 26 are each dissolved in the water which is a component of the blood.
  • Cupric sulphate 24 oxidizes potassium iodide 26 to liberate iodine (not shown).
  • Iodine so formed acts as the disinfecting agent and disinfects the blood.
  • the blood so disinfected migrates through disinfecting layer 20 and enters absorbent layer 14 through first face 16 in a direction indicated by arrow 34.
  • the blood is absorbed within absorbent layer 14.
  • Liquid impervious backing sheet 28 prevents blood from migrating past absorbent layer 14 and being discharged through second face 18.
  • a second embodiment of absorbent pad for rendering hazardous liquids non-hazardous 12 similarly includes absorbent layer 14 having first face 16 and second face 18.
  • a first liquid pervious disinfecting layer 40 is bonded to each of first face 16 and second face 18 of absorbent layer 14.
  • Each of first disinfecting layers 40 contains an evenly distributed concentration of anhydrous cupric sulphate 24 as a first reactant chemical.
  • a second liquid pervious disinfecting layer 42 is bonded to a remote face 44 of each of first disinfecting layers 40.
  • Each of second disinfecting layers 42 contains an evenly distributed concentration of potassium iodide 26 as a second reactant chemical.
  • Second reactant chemical 26 intermixes with first reactant chemical 24 when exposed to an activating liquid, in this case water, to release iodine as a disinfecting agent.
  • Absorbent layer 14, first disinfecting layer 40 and second disinfecting layer 42 are each bonded together by needle- punching 54 to form second embodiment of absorbent pad 12. Needle-punching 54 also serves to enable cross-communication of the activating liquid between the first disinfecting layer 40 and the second disinfecting layer 42.
  • a liquid impervious backing layer could be bonded to second face 18 of absorbent layer 14 in place of first disinfecting layer 40 and second disinfecting layer 42, thereby making second face of absorbent layer ,14 impervious to liquids.
  • second embodiment of absorbent pad 12 is exposed to the contaminated blood to be sterilized and adsorbed.
  • the blood penetrates outer surfaces 46 of each of second disinfecting layers 42 in a direction indicated by arrows 48.
  • Potassium iodide 26 dissolves in the water which is a component of the blood to form a solution of said potassium iodide 26.
  • the solution of potassium iodide in blood so formed migrates through second disinfecting layer in a direction toward first disinfecting layer and enters first disinfecting layer 40 across remote face 44 in a direction indicated by arrows 50.
  • Cupric sulphate 24 dissolves in the water which is a component of the blood and reacts with the dissolved potassium iodide to liberate iodine.
  • the iodine so formed acts as the disinfecting agent and disinfects the blood.
  • the blood so disinfected migrates through first disinfecting layer 40 and enters absorbent layer 14 through first face 16 and second face 18 in a direction indicated by arrows 52.
  • the blood is absorbed within absorbent layer 14. Needle-punching 54 allows cross-communication of solutions of cupric sulphate and potassium iodide between first disinfecting layer 40 and second disinfecting layer 42, thereby enhancing the distribution of iodine as the disinfecting agent throughout the contaminated blood being disinfected and adsorbed using second embodiment of absorbent pad 12.

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Hematology (AREA)
  • Veterinary Medicine (AREA)
  • Public Health (AREA)
  • Animal Behavior & Ethology (AREA)
  • Epidemiology (AREA)
  • Materials Engineering (AREA)
  • Plant Pathology (AREA)
  • Environmental Sciences (AREA)
  • Zoology (AREA)
  • Wood Science & Technology (AREA)
  • Dentistry (AREA)
  • Pest Control & Pesticides (AREA)
  • Inorganic Chemistry (AREA)
  • Agronomy & Crop Science (AREA)
  • Toxicology (AREA)
  • Absorbent Articles And Supports Therefor (AREA)

Abstract

L'invention concerne un tampon absorbant permettant de rendre des liquides dangereux inertes. Ce tampon comprend une couche absorbante et une ou plusieurs couches désinfectantes perméables aux liquides. Cette couche ou ces couches désinfectantes contiennent un mélange de produits chimiques réactifs qui peuvent réagir pour libérer un agent désinfectant lors de l'exposition à un liquide activateur. Cet agent désinfectant rend le liquide dangereux non dangereux.
PCT/GB2001/000336 2001-01-26 2001-01-26 Tampon absorbant permettant de rendre les liquides dangereux non dangereux WO2002058748A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/GB2001/000336 WO2002058748A1 (fr) 2001-01-26 2001-01-26 Tampon absorbant permettant de rendre les liquides dangereux non dangereux

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/GB2001/000336 WO2002058748A1 (fr) 2001-01-26 2001-01-26 Tampon absorbant permettant de rendre les liquides dangereux non dangereux

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WO2002058748A1 true WO2002058748A1 (fr) 2002-08-01

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005112647A2 (fr) * 2004-05-21 2005-12-01 Fellows Adrian Composition antimicrobienne
US7867510B2 (en) * 2006-09-07 2011-01-11 BioLargo Life Technologies, Inc Material having antimicrobial activity when wet
US7943158B2 (en) * 2006-09-07 2011-05-17 BioLargo Life Technologies, Inc Absorbent systems providing antimicrobial activity
US8021610B2 (en) * 2006-09-07 2011-09-20 Biolargo Life Technologies, Inc. Systems providing antimicrobial activity to an environment
US8257749B2 (en) 2007-02-08 2012-09-04 Biolargo Life Technologies, Incorporated Systems providing at least pesticidal activity
US8734559B2 (en) 2006-09-07 2014-05-27 Biolargo Life Technologies, Inc. Moderation of animal environments
US8757253B2 (en) 2006-09-07 2014-06-24 Biolargo Life Technologies, Inc. Moderation of oil extraction waste environments

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US4756937A (en) * 1987-04-30 1988-07-12 Mentzer Elizabeth A Protective barriers, receptacles, liners and packaging for containers of hazardous chemicals
US5705092A (en) * 1995-06-05 1998-01-06 Southwest Research Institute Multilayered biocidal film compositions
CA2191928A1 (fr) * 1996-12-03 1998-06-03 Kenneth Reay Code Composition absorbante
WO1998041095A2 (fr) * 1997-03-17 1998-09-24 Westaim Technologies Inc. Revetements antimicrobiens agissant en tant qu'indicateurs et sparadraps
CA2201825A1 (fr) * 1997-04-04 1998-10-04 Kenneth Reay Code Methode de distribution d'un desinfectant dans un substrat absorbant
WO2000025726A2 (fr) * 1998-11-03 2000-05-11 Becker Robert O Dispositif de traitement antibacterien multicouche

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Publication number Priority date Publication date Assignee Title
GB1395815A (en) * 1971-05-06 1975-05-29 Bunzl & Biach Ag Bandaging material and process for its production
US4756937A (en) * 1987-04-30 1988-07-12 Mentzer Elizabeth A Protective barriers, receptacles, liners and packaging for containers of hazardous chemicals
US5705092A (en) * 1995-06-05 1998-01-06 Southwest Research Institute Multilayered biocidal film compositions
CA2191928A1 (fr) * 1996-12-03 1998-06-03 Kenneth Reay Code Composition absorbante
US6146725A (en) * 1996-12-03 2000-11-14 Code; Kenneth Reay Absorbent composition
WO1998041095A2 (fr) * 1997-03-17 1998-09-24 Westaim Technologies Inc. Revetements antimicrobiens agissant en tant qu'indicateurs et sparadraps
CA2201825A1 (fr) * 1997-04-04 1998-10-04 Kenneth Reay Code Methode de distribution d'un desinfectant dans un substrat absorbant
WO2000025726A2 (fr) * 1998-11-03 2000-05-11 Becker Robert O Dispositif de traitement antibacterien multicouche

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005112647A2 (fr) * 2004-05-21 2005-12-01 Fellows Adrian Composition antimicrobienne
WO2005112631A2 (fr) 2004-05-21 2005-12-01 Fellows Adrian Construction antimicrobienne
WO2005112631A3 (fr) * 2004-05-21 2006-03-09 Fellows Adrian Construction antimicrobienne
WO2005112647A3 (fr) * 2004-05-21 2006-04-27 Fellows Adrian Composition antimicrobienne
JP2007538059A (ja) * 2004-05-21 2007-12-27 フェローズ、エイドリアン、ネヴィル 抗微生物構築物
JP4842935B2 (ja) * 2004-05-21 2011-12-21 フェローズ、エイドリアン、ネヴィル 抗微生物構築物
US7867510B2 (en) * 2006-09-07 2011-01-11 BioLargo Life Technologies, Inc Material having antimicrobial activity when wet
US7943158B2 (en) * 2006-09-07 2011-05-17 BioLargo Life Technologies, Inc Absorbent systems providing antimicrobial activity
US8021610B2 (en) * 2006-09-07 2011-09-20 Biolargo Life Technologies, Inc. Systems providing antimicrobial activity to an environment
US8734559B2 (en) 2006-09-07 2014-05-27 Biolargo Life Technologies, Inc. Moderation of animal environments
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