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    • 55. 发明授权
    • Spin filter perfusion bioreactor (SFPB) cell culture apparatus
    • 旋转过滤器渗透生物反应器(SFPB)细胞培养装置
    • US5126269A
    • 1992-06-30
    • US581706
    • 1990-09-13
    • Richard FikeStefan WeissPatrick Pomeroy
    • Richard FikeStefan WeissPatrick Pomeroy
    • C12M3/06
    • C12M27/02C12M29/04C12M29/10
    • An apparatus is disclosed that separates and removes to an external source, spent cell culture media from a cell culture media and cell culture mixture. The apparatus generally comprises a culture vessel, a filter member, wherein the filter member is positioned in the culture vessel to form an outside region and an inside region. Further provided is a tube member. The tube member being positioned in the inside region and having an opening therein to thereby remove the spent cell culture media brought into the inside region. Further disclosed is a structure for rotating the filter member around the tube member and a structure for sealing the outside region from the inside region when the filter member is rotating around the tube member.
    • 公开了一种从细胞培养基和细胞培养物混合物分离和去除外部来源的废细胞培养基的装置。 该装置通常包括培养容器,过滤构件,其中过滤构件位于培养容器中以形成外部区域和内部区域。 进一步提供一种管件。 管构件定位在内部区域中并且在其中具有开口,从而去除进入内部区域的废细胞培养基。 进一步公开了一种用于使过滤构件围绕管构件旋转的结构和当过滤构件围绕管构件旋转时用于将外部区域与内部区域密封的结构。
    • 57. 发明授权
    • Process for the preparation of 2-amino-s-triazines
    • 2-氨基-s-三嗪的制备方法
    • US4587337A
    • 1986-05-06
    • US715114
    • 1985-03-25
    • Stefan WeissHelmut Krommer
    • Stefan WeissHelmut Krommer
    • C07C233/00C07D251/16C07D251/18C07D251/22C07D251/42
    • C07D251/22C07C233/00C07D251/16C07D251/18
    • The present invention relates to a process for the preparation of 2-amino-s-triazines in three stages. In the first stage nitriles, alcohols and hydrogen chloride are reacted to form the corresponding imido-ester hydrochlorides. In the second stage, the imido-ester hydrochlorides are reacted with cyanamide in the aqueous phase to form the N-cyanimido-esters, which comprises carrying out the first stage in the presence of acetic acid esters and the second stage in an aqueous solution which has been brought to a pH value of 5-8 by addition of bases, and reacting the N-cyanimido-esters with O-alkylisourea, S-alkylisothiourea, guanidine or amidine salts in the presence of a base in the third stage. The 2-amino-s-triazines can be prepared in a high purity and with good yields in this manner.
    • 本发明涉及三个阶段制备2-氨基-s-三嗪的方法。 在第一阶段中,腈,醇和氯化氢反应形成相应的酰亚胺酯盐酸盐。 在第二阶段中,酰亚胺酯盐酸盐与氰胺在水相中反应形成N-氰基亚氨基酯,其包括在乙酸酯存在下进行第一阶段,第二阶段在水溶液中进行 通过加入碱使pH值达到5-8,并在第三阶段在碱的存在下使N-氰基亚氨基酯与O-烷基异脲,S-烷基异硫脲,胍或脒盐反应。 2-氨基-s-三嗪可以以高纯度制备,并且以这种方式具有良好的收率。
    • 58. 发明授权
    • Method of preparing O-methyl-isourea hydrogen sulfate and
O-methyl-isourea sulfate from cyanamide
    • 从氨腈制备O-甲基 - 异硫脲硫酸盐和O-甲基 - 异硫脲硫酸盐的方法
    • US3931316A
    • 1976-01-06
    • US533870
    • 1974-12-18
    • Stefan Weiss
    • Stefan Weiss
    • C07C273/00C07C275/70C07C123/00
    • C07C273/00
    • O-Methyl-isourea hydrogen sulfate is prepared from cyanamide, methanol, and sulfuric acid in a yield of better than 90% when crystalline cyanamide is added to a mixture of sulfuric acid and methanol containing 50 - 150 parts by weight methanol per part sulfuric acid and holding the resulting composition at -10.degree. to 20.degree.C. The recovered O-methyl-isourea hydrogen sulfate is further converted to O-methyl-isourea sulfate with yields greatly exceeding 50%, and even 80%, by holding a mixture of approximately equimolar amounts of cyanamide and of the hydrogen sulfate in a liquid medium essentially consisting of methanol at 5.degree. to 40.degree.C until the O-methyl-isourea sulfate is formed and can be recovered.
    • 当将结晶氰胺加入含有50-150重量份甲醇/硫酸的硫酸和甲醇的混合物中时,由氰胺,甲醇和硫酸制备O-甲基异硫脲硫酸盐,收率高于90% 并将所得组合物保持在-10℃至20℃。回收的O-甲基 - 异硫脲硫酸盐进一步转化为O-甲基 - 异硫脲硫酸盐,产率大大超过50%,甚至80%,通过保持 在基本上由5至40℃的甲醇组成的液体介质中,大约等摩尔量的氰胺和硫酸氢盐直到形成O-甲基 - 异硫脲硫酸盐并且可以回收。