Abstract: Systems and methods for cooling a drive for downhole electric equipment such as an ESP, wherein the drive's electrical components are contained in one or more sealed enclosures to protect them from contaminants in external cooling air. In one embodiment, the drive has two sealed compartments that contain electrical components. Air internal to these compartments is circulated through air-to-air heat exchangers that are positioned in an adjacent duct. Alternating horizontal and vertical passageways through the heat exchangers are formed by flat plates that are offset from each other and connected alternately at their top/bottom and side edges. Air external to the sealed compartments is circulated through the duct to cool the heat exchangers. The amount of air circulated through each heat exchanger may be controlled by valves that regulate airflow through one or more outlets from the duct.

Abstract: Systems and methods for cooling a drive for downhole electric equipment such as an ESP, wherein the drive's electrical components are contained in one or more sealed enclosures to protect them from contaminants in external cooling air. In one embodiment, the drive has two sealed compartments that contain electrical components. Air internal to these compartments is circulated through air-to-air heat exchangers that are positioned in an adjacent duct. Alternating horizontal and vertical passageways through the heat exchangers are formed by flat plates that are offset from each other and connected alternately at their top/bottom and side edges. Air external to the sealed compartments is circulated through the duct to cool the heat exchangers. The amount of air circulated through each heat exchanger may be controlled by valves that regulate airflow through one or more outlets from the duct.

Abstract: The present invention relates to ophthalmic compositions comprising a pH between about 6 and about 8 and about 50 to about 1000 ppm hydrogen peroxide and at least one phosphate buffer. The ophthalmic compositions of the present invention display improved antifungal efficacy against fungi, including candidas albicans and fusarium solani.

Abstract: The present invention relates to ophthalmic compositions comprising a pH between about 6 and about 8 and about 50 to about 1000 ppm hydrogen peroxide, about 100 ppm to about 2000 ppm of at least one chlorite compound and about 20 to 100 ppm of at least one saturated, polymeric quaternium salt. The ophthalmic compositions of the present invention display improved antifungal efficacy against fusarium solani.

Abstract: The present invention relates to stabilized ophthalmic solutions comprising at least one peroxide. In one embodiment, the present invention relates to an ophthalmic solution comprising a pH between about 6 and about 8 and about 50 to about 1000 ppm hydrogen peroxide and about 0.005 wt % (50 ppm) to about 0.05 wt % (500 ppm) at least one salt of diethylenetriamine pentaacetic acid selected from the group consisting of calcium salts of diethylenetriamine pentaacetic acid, zinc salts of diethylenetriamine pentaacetic acid and mixed calcium/zinc salts of diethylenetriamine pentaacetic acid. The present invention further relates to a method for preserving ophthalmic solution comprising at least one peroxide.

Abstract: The invention provides a colorant for use in tinting contact lenses in which the binding polymer used is capable of forming an interpenetrating polymer network with the lens material. When the colorants of the invention are applied to uncured lens material that is subsequently cured, the binding polymer forms an interpenetrating polymer network with the lens material embedding the colorant within the lens material resulting in a stable, tinted lens.

Abstract: This invention provides a blister pack comprising a base and a cover, wherein said base comprises a recess which houses a contact lens and solution, wherein the thickness of the material of said recess is less than 0.75 mm, and said recess houses less than 0.75 ml solution.