biodegradable chemical solvents for industrial use, based on dimethyl glutarate, dimethyl adipate, dimethyl succinate and lactones

Diverting agents, namely, chemicals in the nature of liquids, gels and solids for use as temporary blocking agents used for fracturing and refracturing operations in the field of oil and gas exploration and production

Diverting agents, namely, chemicals in the nature of liquids, gels and solids for use as temporary blocking agents used for fracturing and refracturing operations in the field of oil and gas exploration and production

Computer software, namely, a CD-ROM that is used in connection with teaching statistics through the use of spreadsheets