US PATENT SUBCLASS 252 / 181.1
GETTERS OR GAS OR VAPOR GENERATING MATERIALS FOR ELECTRIC LAMPS, ELECTRIC SPACE DISCHARGE DEVICES, AND SIMILAR DEVICES

Current as of: June, 1999
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252 /   HD   COMPOSITIONS

181.1GETTERS OR GAS OR VAPOR GENERATING MATERIALS FOR ELECTRIC LAMPS, ELECTRIC SPACE DISCHARGE DEVICES, AND SIMILAR DEVICES {4}
181.2  DF  .~> Plural getter and/or gas or vapor generating materials
181.3  DF  .~> Reactive compositions {1}
181.5  DF  .~> Gaseous getters
181.6  DF  .~> Metal or metal compound containing {1}

DEFINITION

Classification: 252/181.1

(under the class definition) Compositions which are (1) designed for use as a getter for an electric lamp, an electric space discharge device, or other container which is either evacuated or contains a confined atmosphere of gas or vapor, and (2) designed for use in generating a gas or vapor within the container of an electric lamp, and electric space discharge device or similar container.

(1) Note. Getters are materials which, when used in closed containers, reduce the gas or vapor content of the container. A getter may react with the gas or vapor in the container to form a solid nonvaporizable material, or to adsorb or absorb the gas or vapor, or may reduce the amount of the gas or vapor in the container in any other way. The material may be a getter for one gas or vapor and may not have any effect upon another gas or vapor.

(2) Note. These subclasses provide for all materials which are limited by the claims to use as a getter. Where the patent claims a material broadly as well as claiming a getter made of the material, the patent will be classified with the appropriate material where the material is classified in a class other than Class 252 and cross-referenced here. These subclasses provide for all materials broadly or specifically claimed which are not otherwise classified which are disclosed for use as getters.

(3) Note. These subclasses provide for patents which claim merely a container or device which contains a particular getter material where no structure of the container or device

is set forth. Where the device is claimed by name only, as an electric lamp, or where details of the device are claimed, the patent is classified with the device.

(4) Note. Where the patent claims a process of gettering and also contains claims to the gettering material, the patent is classified with the art which provides for the process and is cross-referenced to these subclasses.

SEE OR SEARCH THIS CLASS, SUBCLASS: 4+, for compositions for use in extinguishing fires which contain components for generating gas by chemical reactions.

182+, for compositions for use as agents or materials for absorbing or binding extraneous compounds or elements, or for use in causing or carrying out other changes by chemical reactions.

194, for compositions for use in absorbing, binding, removing or retaining water.

364, for compositions for use as solvents, including such compositions as are solvents for gases.

372+, for compositions which are gaseous, and the processes of making them.

500+, for materials for filaments, electrodes and shields for electric lamps and electric space discharge devices. Such a material when also adapted to act as getter or a gas or vapor generating material is classified in subclasses 181.1+, and cross-referenced into subclasses 500+.

SEE OR SEARCH CLASS

75, Specialized Metallurgical Processes, Compositions for Use Therein, Consolidated Metal Powder Compositions, and Loose Metal Particulate Mixtures,

228+, for a composition having a continuous phase of free metal made by consolidating metal particles, and subclasses 255+ for a loose metal particle composition.

95, Gas Separation: Processes, for processes involving steps resulting in separation of a gas from a fluid mixture comprising (a) a gas and solid or liquid particles entrained therein, (b) a liquid and gas entrained therein, or (c) a plurality of gases. See particularly

90+, for processes of gas separation using a solid sorbent.

96, Gas Separation: Apparatus, for apparatus used in separation of a gas from a fluid mixture comprising (a) a gas and solid or liquid particles entrained therein, (b) a liquid and gas entrained therein, or (c) a plurality of gases. See particularly

108+, for solid sorbent apparatus for gas separation.

313, Electric Lamp and Discharge Devices,

545, 546, and 547+, for electric lamps and electric space discharge devices which are provided with a getter or gas or vapor generating material within the envelope of the device.

417, Pumps,

48+, for electrical or getter type devices, which are more than merely the material, including significant claimed containers holding getter material for disposition in a chamber to be evacuated.

423, Chemistry of Inorganic Compounds,

210+, for purifying or separating gaseous components by a chemical reaction.

428, Stock Material or Miscellaneous Articles,

546+, for metallic stock comprising metal particles.

445, Electric Lamp or Space Discharge Component or Device Manufacturing, particularly

41, for gettering processes. 502, Catalyst, Solid Sorbent, or Support Therefor: Product or Process of Making, for a composition comprising a catalyst or support therefor or sorbent of general utility.

510, Cleaning Compositions for Solid Surfaces, Auxiliary Compositions Therefor, or Processes of Preparing the Compositions, for cleaning compositions of general or specific utility, particularly

367+, for those compositions which are adapted to bleach or oxidize by chemical reaction.