U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

Icon_funbox Did You Know...

...that to encourage use of his new invention, the shopping cart, market owner Sylvan Goldman hired fake shoppers to push the carts around his store in Oklahoma City? Seems his customers were reluctant to give up their hand-carried baskets.

Newsletter  PatentStorm News

Make the Most of Our Site

See this month's Top Inventors and Most Cited Patents.

Stay on top of the latest innovations by subscribing to an RSS feed.

Registered users: Manage your profile.

 

Class 435/278 - Producing paper pulp


Subclass of Class 435 - Chemistry: molecular biology and microbiology
Definition: Processes wherein the material which is liberated is paper
No. of patents: 156
Last issue date: 06/02/2009


1        
NumberTitleIssue Date
7541175Alkaline extraction stages comprising xylanase
The invention can be summarized as follows. There is provided a method of bleaching chemical pulp comprising the steps of exposing chemical pulp to a chemical bleaching state to produce a partially bleached pulp and treating the partially bleached pulp with a thermo...
06/02/2009
7368036Xylanase treatment of chemical pulp
The present invention discloses methods of bleaching chemical pulp that use xylanase enzymes after chemical bleaching. The method comprises the steps of carrying out a chlorine dioxide stage to produce a partially bleached pulp, treating the partially bleached pulp ...
05/06/2008
7320741Method of xylanase treatment in a chlorine dioxide bleaching sequence
A method of bleaching chemical pulp with xylanase after chemical bleaching is provided. The method comprises the steps of exposing chemical pulp to a chlorine dioxide bleaching stage to produce a partially bleached pulp, treating the partially bleached pulp with a x...
01/22/2008
7303652Reduced byproduct high solids polyamine-epihalohydrin compositions
A process for rendering a polyamine-epihalohydrin resin storage stable, is described. The process entails treating a polyamine-epihalohydrin resin composition, where the resin is formed in a reaction having a molar ratio of epihalohydrin to secondary amine group of ...
12/04/2007
7297224Method of deinking waste paper using cellulase without lowering paper strength and method of evaluating the same
A deinking method using a cellulase which enables the load upon the environment to be reduced; and an evaluation method whereby a cellulase effective in deinking and the effective addition level of the cellulase can be appropriately determined. By proposing p...
11/20/2007
7294228Biopulp for non-woody fiber plants and biopulping method thereof
The present invention relates to a biopulping method, and more particularly to a biopulping method for non-woody fiber plants. A biopulping method for a non-woody fiber plant is provided. It includes steps of providing a culture solution, adding a non-woody fiber pl...
11/13/2007
7175740Reduced by product polyamine-epihalohydrin resins
Processes for rendering a polyamine-epihalohydrin resin storage stable, including processes that prepare a storage stable resin and/or processes that treat resins. A composition containing a polyamine-epihalohydrin resin which includes CPD-forming species can be tre...
02/13/2007
7157264Modified target enzymes having catalytic triads and uses thereof
Modified target molecules are disclosed comprising genetically modified molecules, preferably enzymes, that include a catalytic triad which alters the performance of the polypeptide. Optionally, such a catalytic triad in the modified target molecule comprises three ...
01/02/2007
7138035Process for the selective modification of carbohydrates by peroxidase catalyzed oxidation
The present invention relates to an environmentally friendly process for the selective oxidation of carbohydrates. The process comprises the addition of a hydroperoxide, including hydrogen peroxide, to a carbohydrate having primary alcohol groups, particularly inclu...
11/21/2006
7125471Papermaking process using enzyme-treated sludge, and products
Enzyme-treated papermaking sludges are provided, as are methods of making the enzyme-treated sludge. Papermaking processes that incorporate the enzyme-treated papermaking sludges into papermaking pulp are also provided as are paper and paperboard products made from ...
10/24/2006
7097737Method of making a modified unbleached pulp for lyocell products
In accordance with the present invention, lyocell products can be made with unbleached pulps resulting in products with high amounts of hemicellulose and high amounts of lignin as compared to conventional lyocell products. The lyocell products of the present inventi...
08/29/2006
7081512Treatment of resins to lower levels of CPD-producing species and improve gelation stability
A process for treating a composition containing a polyamine-epihalohydrin resin that has a low level of CPD-producing species and good gelation stability is disclosed. A polyamine-epihalohydrin resin is prepared with a ratio of epihalohydrin:amine of less than about...
07/25/2006
7018510Process for bio-bleaching of Kraft pulp using bacterial consortia
The present invention relates to an environment friendly, safe, and efficient four-step method of bio-bleaching Kraft pulp using bacterial strains of accession no. MTCC 5096, MTCC 5094, MTCC 5095, and MTCC 5098, a microbial consortium comprising a synergistic mixtur...
03/28/2006
7008505Eucalyptus biomechanical pulping process
In a new process for preparing pulped wood chips for paper making, chips from a hardwood such as eucalyptus are inoculated with aliving culture of one or more white rot fungi. The fungi propagate throughout the body of the wood chip, selectively attacking the lignin...
03/07/2006
6942754Process for producing xylooligosaccharide from lignocellulose pulp
Xylooligosaccharide is produced from a lignocellulose pulp by enzyme-treating a lignocellulose pulp with hemicellulase, filtering the resultant reaction mixture to separate a liquid fraction from the enzyme-treated pulp, subjecting the separated liquid fraction to a...
09/13/2005
6897046Process of preparing biologically active substance
The yield of active polysaccharides contained in Agaricus blazei, such as β-glucan, can be improved, by decomposing and treating the mycelium or fruit body of Agaricus blazei or a liquid waste of the culture of the mycelium with an enzymatic agent pri...
05/24/2005
6830655Method of modifying a xylan-containing carbohydrate substrate having hexenuronic acid groups attached to the xylan
The present invention concerns a method for enzymatic treatment of lignocellulosic materials which contain xylan-polymers, such as cellulose kraft pulps. According to a method of the present kind, at least a part of the hexenuronic acid groups present in the materia...
12/14/2004
6824646Process for oxygen bleaching and enzyme treating lignocellulosic pulp with liquid treatment and recovery
Lignocellulose pulp is bleached by bleaching a pulp in aqueous alkali solution with oxygen and treating the pulp with a hemicellulase, while a liquid fraction delivered from the enzyme treatment step is separated from the hemicellulase treated reaction mixture, and ...
11/30/2004
6812010Method for enzymatic preparation of homogentisate
The invention concerns a method for enzymatic preparation of homogentisate (HMO) from 4-hydroxypyruvate (HPP), characterized in that it consists in carrying out in a suitable reaction medium the following enzymatic reactions: enzymatic conversion of HPP into 4-hydro...
11/02/2004
6767728Composition for enzymatic deinking of waste paper
A method and composition for deinking noncontact-printed wastepaper, particularly xerographic and laser-printed paper, and mixtures of contact and noncontact-printed wastepaper, using an enzyme mixture characterized by a high ratio of β-glucosidase activity to filt...
07/27/2004
6664088Production of vanillin
A method of producing vanillin comprising the steps of: (1) providing trans-ferulic acid or a salt thereof; and (2) providing trans-ferulate: CoASH ligase activity (enzyme activity I), trans-feruloyl ScoA hydratase activity (enzyme activity II), and ...
12/16/2003
6635146Enzymatic treatment of pulp to increase strength using truncated hydrolytic enzymes
Papermaking fibers are treated with certain hydrolytic enzymes, specifically including cellulases, such as truncated endo-glucanases, which have been freed of their cellulose binding domain, to generate aldehyde groups at or near the surface of the fibers...
10/21/2003
6627430Cultivation of zygomycetes from spent sulfite liquor
The present invention relates to a process for the cultivation of chitin/chirosanrich, filamentous fungi with capacity to assimilate mannose as well as xylose, galactose, and glucose, wherein the cultivation of the filamentous fungi in a liquid medium ext...
09/30/2003
6613192Process for producing biokraft pulp from eucalyptus chips
A method for producing paper pulp for use in the making of paper from eucalyptus wood chips. The method comprises inoculating wood chips with white rot fungi, fermenting the wood chips so as to cause a propagation of the fungus through the wood chips and ...
09/02/2003
6610172Process for treating pulp with laccase and a mediator to increase paper wet strength
A process for producing paper materials having improved wet strength. This process involves (a) preparing a suspension of unbleached or semi-bleached chemical or semichemical pulp or pulp from recycled fibers; (b) treating the pulp with a phenol-oxidizing...
08/26/2003
6576083Deinking of waste paper
In the production of pulp and paper from starch-containing paper, the deinking effect can be improved by including treatment with both a starch-degrading enzyme and a pectate lyase. The process comprises enzyme treatment during or after disintegration of ...
06/10/2003
6468391Method of making sanitary paper from chemical pulp using a single component cellulase that does not contain cellulose-building domain
Sanitary paper with improved softness (lower stiffness) can be obtained without significant loss of paper strength by using a papermaking pulp which is treated with a certain type of cellulase component. The cellulase component in question is characterize...
10/22/2002
6465218Biologically active substance and process of preparing the same
The yield of active polysaccharides contained in Agaricus blazei, such as ଲ-glucan, can be improved, by decomposing and treating the mycelium or fruit body of Agaricus blazei or a liquid waste of the culture of the mycelium with an enzymatic agent p...
10/15/2002
6465203Glucan-containing compositions and paper
The present invention provides methods of making paper, utilizing glucans, produced by the glucosyltransferase B, C or D enzyme of the species Streptococcus mutans, instead of modified starches. The present glucans are functionally similar to currently ut...
10/15/2002
6426211Xylanase derived from a Bacillus species, expression vectors for such xylanase and other proteins, host organisms therefor and use thereof
A purified xylanase derived from B. Pumilus PRL B12 is disclosed. This xylanase is efficient for use in the biobleaching of wood pulp, permitting a strong reduction in the quantity of chlorine used and AOX compounds produced in classical and ECF wood pulp...
07/30/2002
6410290Catalases
Catalase enzymes derived from bacteria from the genera Alcaligenes (Deleya) and Microscilla are disclosed. The enzymes are produced from native or recombinant host cells and can be utilized to destroy or detect hydrogen peroxide, e.g., in production of gl...
06/25/2002
6399351Pectate lyases
A novel pectate lyase belonging to a novel family of polysaccharide lyases has good performance in industrial processes under neutral or alkaline conditions such as laundering and textile processing. The pectate lyase may be derivable from Bacillus specie...
06/04/2002
6379948Microbe SKB-1152 strain, and method of bleaching pulp therewith
Pulp bleaching method using SKB-1152 strain which is a lignin-degrading strain having high lignin degrading activity and pulp bleaching activity, or the culture produced using the SKB-1152. When the SKB-1152 strain of this invention or the culture produce...
04/30/2002
6379495Process for the production of cellulose paper pulps by biodelignification of vegetative masses
Process for the production of cellulose paper pulps from vegetable masses, comprising the steps of mixing and conditioning a vegetative mass suitable to form a culture medium with an inoculum constituted of edible ligninolythic mushrooms, such as Lentinus...
04/30/2002
6346407Xylanase, microorganisms producing it, DNA molecules, methods for preparing this xylanase and uses of the latter
The invention relates to a xylanase originating from a Bacillus strain and particularly to Bacillus sp. strain 720/1 (LMG P-14798) and to xylanase obtained from derivatives and mutants of this strain. The xylanase of the invention is active over a wide ra...
02/12/2002
6333181Ethanol production from lignocellulose
This invention presents a method of improving enzymatic degradation of lignocellulose, as in the production of ethanol from lignocellulosic material, through the use of ultrasonic treatment. The invention shows that ultrasonic treatment reduces cellulase ...
12/25/2001
6332951Method for measuring the content of bleaching chemicals used for bleaching cellulose fibers
A method and a device for measuring the content of chemicals used in connection with bleaching of preferably cellulose fibers in a pulp, suspension for the purpose of providing a better and more uniform product quality and preventing overdosage of the ble...
12/25/2001
6284479Substitutes for modified starch and latexes in paper manufacture
The present invention provides methods of making paper, utilizing glucans, produced by the glucosyltransferase B, C or D enzyme of the species Streptococcus mutans, instead of modified starches. The present glucans are functionally similar to currently ut...
09/04/2001
6258209Multi-component system for modifying, degrading or bleaching lignin, lignin-containing materials or similar substances
Multi-component system for modifying, degrading or bleaching lignin, lignin-containing materials or similar substances, includes (a) if appropriate at least one oxidation catalyst; (b) at least one suitable oxidizing agent; and (c) at least one mediator, ...
07/10/2001
6254722Method for making dissolving pulp from paper products containing hardwood fibers
A method for making dissolving pulp from cellulosic fiber. The fiber is treated with a 3-stage sequence having a first alkali extraction stage, a xylanase treatment stage, and a second alkali extraction stage. Having the xylanase treatment stage sandwiche...
07/03/2001
1        
 
Sign InRegister
Username  
Password   
forgot password?