Peter Christensen

US Patent:

7605710, Oct 20, 2009

Filed:

Aug 18, 2006

Appl. No.:

11/506602

Inventors:

Martin Crnkovich - Walnut Creek CA, US
Peter Christensen - Concord CA, US
Roland Levin - San Ramon CA, US

Assignee:

Fresenius Medical Care Holdings, Inc. - Lexington MA

International Classification:

G08B 21/00

US Classification:

340604, 340603, 340605

Abstract:

The present invention relates to a wetness detector system that rapidly detects the presence of wetness due to a liquid leak in a system. The wetness detector system contains a reusable wetness sensor that is able to accurately detect the presence of wetness and, in the case of an extracorporeal blood treatment, the presence of blood. The wetness detector system can quickly alert both a user and medical personnel that a liquid leak has been detected in a treatment system and, if necessary, halt the removal of liquids and/or blood from the patient. If a liquid leak is not detected for a period of time, the wetness sensor can enter a low power state, extending the life of the device. The wetness detector system can monitor a number of wetness sensors simultaneously, which would, for example, eliminate the need for medical personnel to continuously inspect numerous patients visually for potentially fatal blood leaks due to needle dislodgement during an extracorporeal blood treatment.

US Patent:

7973667, Jul 5, 2011

Filed:

Sep 10, 2009

Appl. No.:

12/556849

Inventors:

Martin Crnkovich - Walnut Creek CA, US
Peter Christensen - Concord CA, US
Roland Levin - San Ramon CA, US

Assignee:

Fresenius Medical Care Holdings, Inc. - Waltham MA

International Classification:

G08B 21/00

US Classification:

340604, 340603, 340605, 604 401

Abstract:

The present invention relates to a wetness detector system that rapidly detects the presence of wetness due to a liquid leak in a system. The wetness detector system contains a reusable wetness sensor that is able to accurately detect the presence of wetness and, in the case of an extracorporeal blood treatment, the presence of blood. The wetness detector system can quickly alert both a user and medical personnel that a liquid leak has been detected in a treatment system and, if necessary, halt the removal of liquids and/or blood from the patient. If a liquid leak is not detected for a period of time, the wetness sensor can enter a low power state, extending the life of the device. The wetness detector system can monitor a number of wetness sensors simultaneously, which would, for example, eliminate the need for medical personnel to continuously inspect numerous patients visually for potentially fatal blood leaks due to needle dislodgement during an extracorporeal blood treatment.

US Patent:

20200283415, Sep 10, 2020

Filed:

May 18, 2020

Appl. No.:

16/877336

Inventors:

Brett A. Helms - Oakland CA, US
Peter R. Christensen - Berkeley CA, US

Assignee:

The Regents of the University of California - Oakland CA

International Classification:

C07D 403/06
C08G 73/02
C08L 79/02
C08K 11/00
C09J 179/02
C08J 5/02
C08J 9/04
C08J 11/28
C07C 49/573
C07C 225/24
C07D 407/06
H01B 1/12
H01B 3/30
G10K 11/162
G10K 11/18

Abstract:

The present invention relates to a composition of polymers comprising dynamic covalent diketoenamine bonds. This composition allows the formulation of polymeric materials with a wide range of architectures and properties, and further allows these materials to be recycled using thermal, chemical, or mechanical processes