Location History:
- San Diego, CA (US) (1994)
- Escondido, CA (US) (1992 - 1999)
Company Filing History:
2 out of 13 
1 out of 832,880 Years Active: 1992-1999
Title: The Innovations of Donald H Klosterboer
Introduction
Donald H Klosterboer is an accomplished inventor based in Escondido, California. He holds three patents that showcase his contributions to the field of film technology. His innovative designs have significantly impacted the way film cartridges and cleaning solutions are developed and utilized.
Latest Patents
One of Klosterboer's latest patents is for a film cartridge and cartridge mounting insert for microfilm machines. This cartridge is a generally cylindrical enclosure with a light seal through which a film web is drawn. The cartridge is closed with two side plates, one of which is removable. A spindle is journaled in the side plate, allowing film wound on a core to be mounted on the spindle. The assembly is placed in an adapter insert that incorporates a motion multiplication mechanism, such as gearing, to drive a detectable element to rotate multiple times for each rotation of the core. This detectable element is positioned opposite a magnetic or optical detector on the host machine. Another significant patent is for a composition and method of cleaning continuous, non-replenished film. This solution contains a water-soluble stilbene sulfonic acid derivative, which is used to solubilize oily dye residues in photodeveloper solutions. This method is particularly effective for developing direct positive silver halide film without generating foam.
Career Highlights
Throughout his career, Klosterboer has worked with notable companies, including Anacomp, Inc. His work has been instrumental in advancing film technology and improving the efficiency of film processing.
Collaborations
Klosterboer has collaborated with several professionals in his field, including Jerry M Owens and Aubrey E Thompson. These collaborations have contributed to the development of his innovative patents and have enhanced the impact of his work.
Conclusion
Donald H Klosterboer is a notable inventor whose patents have made significant contributions to film technology. His innovative designs and methods continue to influence the industry today.