Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Browse by Category: Main > Material Science
Class Information
Number: 528/308.5
Name: Synthetic resins or natural rubbers -- part of the class 520 series > Synthetic resins (class 520, subclass 1) > From carboxylic acid or derivative thereof > From di- or higher ester of a polycarboxylic acid as sole reactant, or from a polycarboxylic acid or derivative with a compound containing two or more hydroxyl groups or salts thereof > Aryl-containing carboxylic acid or derivative of an aryl-containing dicarboxylic acid > Polyethylene terephthalate per se > Processes of preparing > At least two claimed distinct temperature or pressure gradients
Description: Subject matter wherein the process involves at least two distinct gradients, either temperature and/or pressure.










Patents under this class:
1 2

Patent Number Title Of Patent Date Issued
8557882 Method and device for the decontamination of plastic flakes Oct. 15, 2013
8394866 Method and device for the decontamination of plastic flakes Mar. 12, 2013
8324339 Method and apparatus for thermally processing polyester pellets Dec. 4, 2012
8299203 High IV melt phase polyester polymer catalyzed with antimony containing compounds Oct. 30, 2012
7786247 High IV melt phase polyester polymer catalyzed with antimony containing compounds Aug. 31, 2010
7211634 Process for the preparation of polyesters containing 1,4-cyclohexanedimethanol May. 1, 2007
7196159 Process for producing polytrimethylene terephthalate Mar. 27, 2007
7153927 Process of continuously producing polyesters or copolyesters Dec. 26, 2006
6872461 Matt, flame-retardant, co-extruded polyester film, a method for the production thereof and the use of the same Mar. 29, 2005
6872460 Matt, UV-stable, Thermoformable, co-extruded polyester film, a method for the production thereof and the use of the same Mar. 29, 2005
5830981 Process for producing polyethylene terephthalate Nov. 3, 1998
5681918 Process for preparing copolyesters of terephthalic acid ethylene glycol and 1 4-cyclohexanedimethanol exhibiting a neutral hue high clarity and increased brightness Oct. 28, 1997
5648032 Process for producing polyester articles having low acetaldehyde content Jul. 15, 1997
5635589 Process for production of condensation polymers Jun. 3, 1997
5573820 Process for preparing polyester Nov. 12, 1996
5523381 Production of polyesters of improved whiteness Jun. 4, 1996
5516880 Fluid bed cooling system for polymer processing May. 14, 1996
5466765 Vaccum system for controlling pressure in a polyester process Nov. 14, 1995
5466765 Vaccum system for controlling pressure in a polyester process Nov. 14, 1995
5444144 Process for producing polyethylene terephthalate Aug. 22, 1995
5424121 Biaxially oriented polyester film Jun. 13, 1995
5393871 Production of polyesters and polyester articles having good clarity Feb. 28, 1995
5393863 Production of branched polyesters Feb. 28, 1995
5362844 Continuous process for the production of polyester for food packaging Nov. 8, 1994
5270444 Process for treatment of polyethylene terephthalate, polyethylene terephthalate for molding purposes and process for preparation thereof Dec. 14, 1993
5241046 Process for treatment of polyethylene terephthalate, polyethylene terephthalate for molding purposes and process for preparation thereof Aug. 31, 1993
5115085 Process for the preparation of polyester resin May. 19, 1992
5049647 Method for the reduction of impurities in polyester resins Sep. 17, 1991
4876326 Solid state polymerization of polyester prepolymers Oct. 24, 1989
4758650 Process and apparatus for producing high molecular weight polyesters Jul. 19, 1988
4455417 Process to form amorphous, crystallizable thermoplastic polymers Jun. 19, 1984
4434276 Process for the condensation of poly(alkylene terephthalates) Feb. 28, 1984
4387213 Process for the condensation of linear polyalkylene terephthalates Jun. 7, 1983
4327207 Production of thermally stabilized polyester with alkylene carbonates and sodium or potassium iodide Apr. 27, 1982
4289895 Method for the preparation of oligomeric alkylene terephthalates Sep. 15, 1981
4260721 Modified fluidized bed Apr. 7, 1981
4260734 Modified fluidized bed Apr. 7, 1981
4254253 Preparation of high molecular weight polyester Mar. 3, 1981
4251649 Heat-curable and solvent-soluble ester group-containing polymer compositions and process for their preparation Feb. 17, 1981
4248996 Preparation of linear high molecular weight saturated polyesters Feb. 3, 1981
4238593 Method for production of a high molecular weight polyester prepared from a prepolymer polyester having an optimal carboxyl content Dec. 9, 1980
4237261 Process for continuously producing polyester and spun fiber Dec. 2, 1980
4230818 Reduction of glycol ethers in polyesters Oct. 28, 1980
4214072 Process for the manufacture of linear high molecular weight polyesters Jul. 22, 1980
4208527 Process for the manufacture of high molecular weight poly-(ethylene terephthalate) Jun. 17, 1980
4205157 Method for production of high molecular weight polyester with low catalyst level and low carboxyl content May. 27, 1980
4165420 Solid state polymerization of polyester prepolymer Aug. 21, 1979
4161578 Process for solid phase polymerization of polyester Jul. 17, 1979
4154921 Preparation of polyesters May. 15, 1979
4153766 Continuous process for the production of ethylene terephthalate polyesters May. 8, 1979

1 2










 
 
  Recently Added Patents
Liquid composite compositions using non-volatile liquids and nanoparticles and uses thereof
Methods and systems for assessing sales activity of a merchant
Compositions and methods of vascular injury repair
Color stable manganese-doped phosphors
Wireless refrigerant scale platform
Method and apparatus for diagnosing faults in a hybrid internet protocol network
Method of treating lung cancer
  Randomly Featured Patents
Waveform data processing system and method of waveform data processing for electronic musical instrument
Method of creating curved surfaces
Crop conveyor tine stripper
Method and apparatus for redirection of operations between interfaces
Bi-directional data transfer using the video blanking period in a digital data stream
Watercraft deck
Optical recording media and a method of recording and reproducing information
Method and apparatus for forming surfaces on piston rings
Carrier for the manufacture of abrasion-resistant catalysts, process for the production of the carrier and catalyst deposited on the carrier
Method for the preparation of oligomeric alkylene terephthalates