Plug for use in cementing wells,申请号US19380214248-传众专利搜索

首页产品黄页商标征信

会员服务注册登录

法人/股东/高管

发明名称	Plug for use in cementing wells
摘要
申请公布号	US2179812(A)	申请公布日期	1939.11.14
申请号	US19380214248	申请日期	1938.06.17
申请人	CALKINS RALPH M	发明人	CALKINS RALPH M.
分类号	E21B33/16	主分类号	E21B33/16
代理机构		代理人
主权项
地址

您可能感兴趣的专利

Novel thrombolytic agent, process for preparing same and its use for the preparation of a thrombi dissolving medicament.

NMDA antagonists.

Determination of substances in a liquid medium by crossflow filtration.

Spacers for flat panel displays.

METHOD FOR TREATING RESIDUES FROM A WASTE INCINERATION PLANT AND WASTE INCINERATION PLANT FOR CARRYING OUT SAID METHOD

Method and apparatus for checking the condition of adhesive application in packages.

Improved drop generator utilizing damping for mode suppression.

Exhaust sensor with tubular shell.

Serial current limiting device.

TEMPERATURE ZONE SPECIFIC PRESSURE-SENSITIVE ADHESIVE COMPOSITIONS, AND ADHESIVE ASSEMBLIES AND METHODS OF USE ASSOCIATED THEREWITH.

Agent for the permanent reshaping of hair and new hair keratin reducing 2-hydroxy-3-mercatopropanoic esters.

METHOD AND APPARATUS FOR THE DETERMINATION OF THE STATE OF CURE OF ELASTOMERS

COATING DEVICE FOR A TRAVELLING WEB OF PAPER OR CARDBOARD.

Film-sheet assemblage for peel-apart self-developing film.

Method for separating a blood material into blood component products.

Apparatus for making optical discs.

Synthesis gas process with reactivation of catalyst.

Method of micro-machining an integrated sensor on the surface of a silicon wafer.

Lighting strip.