中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

159 records (took 0.017 seconds)

    61.
    发明专利
    未知

    公开(公告)号：AT91275T

    公开(公告)日：1993-07-15

    申请号：AT89200199

    申请日：1989-01-31

    Applicant: PCR GROUP INC

    Inventor： WILSON MICHAEL EARL

    IPC: B27K3/34 ,  B27K5/00 ,  C04B41/49 ,  C04B41/64 ,  C04B41/84 ,  C09K3/18

    Abstract: There are provided aqueous emulsions useful for rendering porous substrates water repellent comprising (a) a hydrolyzable silane having a determinable pH-stable range, (b) an emulsifying agent having an HLB value of from 2 to 20, an effective amount of (c) a buffering compound to maintain the composition within the pH-stable range; and (d) water. Such buffered compositions are stable on long term storage and maintain high effective levels of active silane content even when they include biocides which may accelerate the hydrolysis of aqueous silane-containing compositions.

    63.
    发明专利
    未知

    公开(公告)号：IT8933506V0

    公开(公告)日：1989-03-29

    申请号：IT3350689

    申请日：1989-03-29

    Applicant: PCR SRL

    IPC: F02B20060101

    GAS LASER APPARATUS, METHOD AND TURBINE COMPRESSOR THEREFOR
    64.
    发明专利
    GAS LASER APPARATUS, METHOD AND TURBINE COMPRESSOR THEREFOR 未知

    公开(公告)号：AU1594088A

    公开(公告)日：1988-10-10

    申请号：AU1594088

    申请日：1988-03-18

    Applicant: PCR CORP

    Inventor： NILSEN CARL J ,  WEISS HARDY P

    IPC: F04D29/10 ,  F04D23/00 ,  F04D29/12 ,  F04D29/58 ,  F16J15/40 ,  H01S3/036 ,  H01S3/04 ,  H01S3/097 ,  H01S3/223 ,  H01S3/22

    Abstract: A fast axial flow gas laser apparatus comprising an at least essentially closed loop defining a flow path for a laser gas, an arrangement for exciting gas flowing in the loop of the apparatus to cause the gas to lase, and a regenerative compressor for flowing gas through the closed loop along the flow path. The compressor is capable of operating with a pressure ratio sufficient to flow the gas along at least a portion of the loop at a speed at least half the speed of sound in the gas with inlet pressures of only a small fraction of an atmosphere. The uniform discharge pressure of the compressor results in a uniform laser discharge or output. A positive pressure fluid pressure seal prevents lubricant at a bearing support for the impeller shaft of the compressor from moving to the impeller and possibly contaminating the laser gas being compressed thereby and also prevents surrounding air from contaminating the laser gas. The pressurized fluid of the seal is permitted to migrate into the laser gas as make-up gas. The compressor is capable of moving gas through the laser at speeds approaching the speed of sound for high power output from the laser without power fluctuations and with minimal service requirements and long life while occupying only a small area within an existing laser cabinet.

    66.
    发明专利
    未知

    公开(公告)号：IT1094895B

    公开(公告)日：1985-08-10

    申请号：IT2398878

    申请日：1978-05-30

    Applicant: PCR

    IPC: C07H19/06 ,  A61K

    69.
    发明专利
    未知

    公开(公告)号：CH601148A5

    公开(公告)日：1978-06-30

    申请号：CH52174

    申请日：1974-01-15

    Applicant: PCR

    Inventor： REED THOMAS M

    IPC: C07C17/00 ,  C07C17/386 ,  C07C19/14 ,  C07C67/00 ,  C07C19/08 ,  C07C17/38

    Abstract: 1412567 Bromochlorotrifluoroethane purification and azeotropes PCR Inc 18 Feb 1974 [26 April 1973] 7370/74 Heading C2C 1,1,2-Trifluoro - 1 - bromo - 2 - chloroethane and/or 1 - bromo - 1 - chloro - 2,2,2 - trifluoroethane, containing 1,2-dichlorohexafluorocyclobutane as impurity, are purified by adding an amount of acetone or tetrahydrofuran to form an azeotrope and distilling under refluxing conditions the resulting composition. Preferably at least 25 weight per cent of acetone or THF is used based on the total weight of said solvent and bromochlorotrifluoroethane. It is preferred to reduce the impurity to less than 0.01% by weight. Azeotropes comprising (a) 47 mole per cent of C 2 F 3 BrClH and 53 mole per cent of acetone and (b) 39 mole per cent C 2 F 3 BrClH and 61 mole per cent THF are novel compositions.

Patent Agency Ranking