Resources Contact Us Home
Browse by Category: Main > Material Science
Class Information
Number: 521/
Name: Synthetic resins or natural rubbers -- part of the class 520 series > Synthetic resins (class 520, subclass 1)

Sub-classes under this class:

Class Number Class Name Patents
521/25 Ion-exchange polymer or process of preparing 307
521/40 Process of treating scrap or waste product containing solid organic polymer to recover a solid polymer therefrom 336
521/50 Cellular products or processes of preparing a cellular product, e.g., foams, pores, channels, etc. 291

Patents under this class:

Patent Number Title Of Patent Date Issued

  Recently Added Patents
Amplitude-shift-keying (ASK) envelope detector and demodulation circuits
Methods of operating non-volatile memory devices during write operation interruption, non-volatile memory devices, memories and electronic systems operating the same
Financial transaction cards
Circuit breakers
Drug delivery system
Signal processing device and method for providing oscillating signal in the signal processing device
  Randomly Featured Patents
Antenna system
Vehicle power steering system
Computer mouse
Antenna system including a plurality of meander conductors for a portable radio apparatus
Measuring device for workpiece held on chuck table
Transflective LCD using multilayer dielectric film transflector
Pesticidal composition containing a microencapsulated organo-phosphorus or carbamate in a pyrethroid dispersion
2,5-Dichloro-thiazolo[4,5-d]thiazole and process for making same
Soft contact lens
Apparatus for decontaminating radioactively contaminated surfaces