Wendell J Manske

44572522, Jul 3, 1984

Nov 9, 1982

6/440264

Wendell J. Manske - Birchwood MN

Minnesota Mining and Manufacturing Company - St. Paul MN

G01K 1100

116216

A critical temperature indicator is provided utilizing the volume reduction characteristics of organic compounds as they undergo a change from the liquid state to the solid state. The bulb and a portion of the capillary tube of a thermometer-like structure contains a colorless organic compound. Another organic compound saturated with a dye, which compound has a solidification temperature lower than that of the colorless compound and which is miscible with the colorless compound, is located in the capillary tube and separated from the colorless compound by a solid, movable plug or a liquid which is immiscible with either the colorless or the dyed compound. The volume of the colorless compound upon solidification is less than the volume of the bulb so that the separating plug or liquid and at least a portion of the dyed compound are drawn into the bulb upon solidification. The dyed compound then mixes with the colorless compound to provide a visual indication that the colorless compound has solidified.

43539904, Oct 12, 1982

Feb 9, 1981

6/232502

Wendell J. Manske - Birchwood MN
Paul M. Hawkins - Burlington KY

Minnesota Mining and Manufacturing Company - St. Paul MN

C12M 100
G01D 2100
G01K 1100
C12M 134

435287

A device for monitoring thermal energy input and displaying the relationship of the thermal energy input to a selected time/temperature relationship. The device employs an indicating material which, when melted, expands and flows into a narrow channel to provide an irreversible, visible indication of the thermal energy to which the device has been exposed.

52153789, Jun 1, 1993

Apr 17, 1992

7/870281

Wendell J. Manske - Birchwood MN

Introtech, Inc. - White Bear Lake MN

G01K 300
G01K 1100
G01K 1112
G01K 508
G01K 520

374105

A dual temperature indicator providing visual indications when exposed to predetermined high or low temperatures. The indicator has a bulb with a capillary tube and an attached high temperature indicator structure. The bulb has a first liquid which also fills a predetermined portion of the tube. A separating substance and a second miscible liquid further fills a predetermined portion of the remainder of the tube. At a predetermined low temperature, the liquid in the bulb contracts causing the separating substance and a portion of the second liquid to move into the bulb to produce a visible color change. The high temperature indicator structure has an indicating member in contact with the capillary tube end and which provides a visual indication at a predetermined high temperature when the liquids expand upon an environmental temperature increase.

50424556, Aug 27, 1991

Aug 18, 1989

7/395906

Samuel Yue - Bloomington MN
Wendell J. Manske - White Bear Lake MN
John D. Dockter - Eagan MN

PMT Corporation - Chanhassen MN

F24J 100

126263

A warmer used to warm fluids, such as blood or the like, passed into the human body. Air is introduced through an opened windowed membrane to expose chemicals in a container. A chemical reaction with the air causes a heat reaction of the chemicals. A tube engages in a trough in the container adjacent where the chemical reaction takes place, thereby absorbing the heat of the chemical reaction for warming the fluids, such as blood, saline solution, injectable solutions in trauma, pre-surgical, intra-surgical, post-surgical and any other solutions through the tube.

44572530, Jul 3, 1984

Nov 9, 1982

6/440265

Wendell J. Manske - Birchwood MN

Minnesota Mining and Manufacturing Company - St. Paul MN

G01K 1100

116216

A critical temperature indicator is provided utilizing the volume reduction characteristics of organic compounds as they undergo a change from the liquid state to the solid state. A capillary tube sealed at one end contains a first organic compound adjacent the closed end and a second colored organic compound which has a solidification temperature lower than that of the first compound and which is separated from the first compound by a liquid which is immiscible with either the first or the second compounds. The separating liquid also has a solidification temperature lower than that of the first compound. A colorless or white porous plug is located within the separating liquid and frictionally engages the tube to prevent movement of the plug with respect to the tube. The volume of the separating liquid is such that contact between the colored compound and the plug is prevented prior to solidification of the first compound and solidification of the first compound draws the colored compound into the plug to color the plug and provide a visual indication that the first compound has solidified.

47937173, Dec 27, 1988

May 6, 1982

6/375376

Wendell J. Manske - Birchwood MN

Minnesota Mining and Manufacturing Company - St. Paul MN

G01K 1108

374160

Indicating device suitable for visibly indicating conditions such as the application of force or pressure or the exposure to a critical temperature. The device includes a porous pad containing an indicating dyed chemical, a wick maintained in spaced relation to the pad and a snap action activating means. The activating means forces the wick into contact with the pad and dyed chemical migration provides visible indication of the application of force or pressure. The indicating dyed chemical may be frozen and the activating means engaged. Upon reaching a critical temperature the frozen chemical melts allowing dye migration into the wick and a visible indication of exposure to the critical temperature.