Famous Patents
In 1608, Dutch eyeglass maker Hans Lipperhey filed the first patent for a working telescope. The patent was denied.
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.
| Number | Title | Issue Date |
| 4070232 | Prehydrolysis and digestion of plant material Plant material containing hemicellulose and lignin is prehydrolyzed in the presence of steam and the vapors of a dilute acid solution having a pH of 1.5-3.5 at a temperature of 105° C to 135° C for 7-20 minutes to hydrolyze the hemicellulose into pentos... | 01/24/1978 |
| 4061859 | Viscosity reduction of cellulose derivatives In the method of making low molecular weight cellulose ethers and esters by contacting such ethers or esters of higher molecular weight with HCl or other hydrogen halide gas, yellowing of the depolymerized or degraded product is inhibited by treating the ... | 12/06/1977 |
| 4058411 | Decrystallization of cellulose A method for decrystallizing cellulose in natural cellulosic material which comprises admixing phosphoric acid with the cellulosic material to form a gel therewith, admixing tetrahydrofuran with the gel to extract the phosphoric acid forming a solution th... | 11/15/1977 |
| 4038481 | Method for treatment of corn hulls Corn hulls are subjected to a treatment to obtain three fractions therefrom comprising a cellulosic fraction, a hemicellulose fraction and a noncarbohydrate fraction. The noncarbohydrate fraction is characterized as being an organic solvent extract compri... | 07/26/1977 |
| 4029515 | Acid hydrolysis of polysaccharide-containing raw material A continuous method for the decomposition of a raw-material that contains polysaccharides by means of acid hydrolysis. The raw-material is hydrolyzed continuously in one reactor as two steps. In the first step, the hydrolysis is run in the upper part of t... | 06/14/1977 |
| 4025356 | Method for continuous hydrolysis of pentose containing material and apparatus for implementing the method Method and apparatus for the continuous acid hydrolysis of pentosan-containing material at a temperature between 80° and 120° C and at a pH lower than 5. At least two portions of hydrolysate are re-cycled back into the hydrolysis vessel. One recycle ... | 05/24/1977 |
| 4023982 | Apparatus for the production of sugars from hemi-cellulose-containing raw materials The apparatus operates on a continuous basis under gravity flow to extract sugars from hemi-cellulose-containing raw material such as xylose from xylan-containing raw materials. The apparatus includes a sequence of interconnected vessels to steam heat the... | 05/17/1977 |
| 4018620 | Method of hydrolyzing cellulose to monosaccharides A method of hydrolyzing cellulose to monosaccharides, especially glucose, by subjecting cellulose, under controlled temperature and pressure, to an aqueous mixture of calcium chloride and an acid, preferably hydrochloric acid, providing a low concentratio... | 04/19/1977 |
| 4008285 | Process for making xylitol A method for recovering xylitol from pentosan-, preferably xylan-containing raw materials including the steps of hydrolyzing the raw material, purifying the hydrolysate by ion exclusion and color removal, and then subjecting the purified solution to chrom... | 02/15/1977 |
| 3990904 | Method for the preparation of xylose solutions A method for the preparation of xylose solutions from oat husks which comprises: A. hydrolyzing oat husks with a solution of alkali metal hydroxide to provide oat husks from which the chemically bound acetic acid originally present therein has been substa... | 11/09/1976 |
| 3985815 | Aqueous crystallization of xylitol A process for obtaining crystalline xylitol substantially free of xylose from a mixture of xylose and xylitol by providing an aqueous solution of about 50 to 75 weight percent xylitol, no more than about 5 weight percent xylose and about 20 to 45 weight p... | 10/12/1976 |
| 3970712 | Hydrolysis of oat husks A process for the hydrolysis of oat husks is carried out with alkali metal hydroxide or alkali metal chlorite in a first stage and with mineral acid in a second stage to provide D-(+)-xylose. The xylose can be recovered as such, or converted in situ to xy... | 07/20/1976 |
| 3954497 | Hydrolysis of deciduous wood A process for the hydrolysis of deciduous wood wherein the hydrolysis is carried out in a first stage with an alkali metal hydroxide solution of concentration less than 4 percent by weight and in a second stage with mineral acid. A resulting product, D-(+... | 05/04/1976 |
| 3939286 | Process for oxidizing and hydrolyzing plant organic matter particles to increase the digestability thereof by ruminants A process for treating plant organic matter particles to increase the digestability thereof by ruminants including mixing the organic particles with water, a nontoxic acid catalyst to produce a Ph lower than 3.0, and a metallic catalyst of either iron or ... | 02/17/1976 |
