U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

Icon_funbox Quotables

"Inventing is a combination of brains and materials. The more brains you use, the less material you need."

Charles Kettering

Newsletter  PatentStorm News

Make the Most of PatentStorm

See this month's Top Inventors and Most Cited Patents.

Stay on top of the latest patents by subscribing to an RSS feed.

Got questions? Ask a Patent Expert!

Registered users: Manage your profile, comments and alerts.

 

Class 502 - Catalyst, solid sorbent, or support therefor: product or process of making

RSS Feeds for this Class: Rss Patents   Rss Applications   What is RSS?
348 Subclasses


Subclasses list

Definition

This class provides for (1) a mixture of materials intended to catalyze a reaction or to sorb a component of a fluid or (2) certain single materials specifically structured to catalyze a reaction or sorb a component.

In this class, many subclasses are based on the groupings of elements in the periodic chart. Below are listed elements in the group as used in the class.

Group I metals: Lithium(Li), Sodium(Na), Potassium(K), Rubidium(Rb), Cesium(Ca), Francium(Fr), Copper(Cu), Silver(Ag), and Gold(Au)

Group II metals: Beryllium(Be), Magnesium(Mg), Calcium(Ca), Strontium(Sr), Barium(Ba), Radium(Ra), Zinc(Zn), Cadmium(Cd), and Mercury(Hg)

Group III: Scandium(Sc), Ttrium(Y), Aluminum(Al), Gallium(Ga), Indium(In), and Thallium(Tl)*

Group IV: Titanium(Ti), Zirconium(Zr), Hafnium(Hf), Germanium(Ge), Tin(Sn), and Lead(Pd)

Group V metals: Vanadium(V), Niobium(Nb), Tantalum(Ta), Arsenic(As), Antimony(Sb), and Bismuth(Bi)

Group VI metals: Chromium(Cr), Molybdenum(Mo), Wolfram(W), Tungsten(T), and Polonium(Po)

Group VII metals: Manganese(Mn), Technetium(To), and Rhenium(Re)

Group VIII: Iron group metals, Iron(Fe), Cobalt(Co), Nickel(Ni), and the platinum group metals, Ruthenium(Ru), Rhodium(Rh), Palladium(Pd), Osmium(Os), Iridium(In), and Platinum(Pt)

Lanthanides: Elements with atomic numbers 57-71 inclusive, Lanthanum(La), Cerium(Ce), Praseodymium(Pr), Neodymium(Nd), Promethium(Pm), Samarium(Sm), Europium(Eu), Gadolinium(Gd), Terbium(Tb), Dysprosium(Dy), Holmium(Ho), Erbium(Er), Thulium(Th), Ytterbium(Yb), and Lutetium(Lu)

Alkaline earth metals: Calcium(Ca), Strontium(Sr), Barium(Ba), and Radium(Ra)

Alkali metals: Lithium(Li), Sodium(Na), Potassium(K), Rubidium(Rb), Cesium(Cs), and Francium(Fr)

Actinides: Elements with atomic numbers 89 and above inclusive, Actinium(Ac), Thorium(Th), Protactinium(Pa), Uranium(U), Neptunium(Np), Plutonium(Pu), Americium(Am), Curium(Cm), Berkelium(Bk), Californium(Cf), Einsteinium(Es), Fermium(Fm), Mendelevium(Md), Nobelium(No), Lawrencium(Lr)*

Halogens: Fluorine(F), Chlorine(Cl), Bromine(Br) Iodine(I), and Astatine(At)

Lithium(Li), Sodium(Na), Potassium(K), Rubidium(Rb), Cesium(Cs), and Francium(Fr)

Rare earth: Scandium(Sc), Yttrium(Y), and Lanthanide group

* La is grouped with the Lanthanides and Ac with the Actinides.

Notes

(1) Note. Except as indicated in the title and definition, the subclasses in this class provide for both a product and a process of making the product.

Lines with other classes and within this class

Lines Within This Class

In this schedule some subclasses, namely 6, 8+, 104+ and 151 provide for methods only and a claim to a product must be classified in another subclass, while other subclasses, e.g., 11+, 20+, and 418+ although developed on a process theme, provide also for the products of the process. Except for those situations in which a subclass for a specific process is provided, a method of making a composition of this class is classified with the composition, per se.

Lines With Other Classes

(1) Classes directed to element or compound

Superiority is dependent on comprehensiveness. A patent claiming a new compound and a composition of this class including such compound is placed here as an original and cross referenced to the compound class. A patent claiming a new compound or process of making it, and a composition of this class which is used in making the compound is placed in the compound class as an original and cross-referenced here.

(2) Chemical Composition Placement

The rules for determining Class placement of the Original Reference (OR) for claimed chemical compositions are set forth in the Class Definition of Class 252 in the section LINES WITH OTHER CLASSES AND WITHIN THIS CLASS, subsection COMPOSITION CLASS SUPERIORITY, which includes a hierarchical ORDER OF SUPERIORITY FOR COMPOSITION CLASSES.

References to Other Classes, below, are directed to the following: Classes Providing for Related Matter; or Classes Which May Have Catalytic or Sorbent Functions.

 
Forgot password?
Register here