Danville, CA, United States of America

John Metcalf

This inventor holds 1 USPTO granted patent. Top assignee: California Processing Machinery. Active years: 1993.

IDiyas Innovation Intelligence. (2026). Inventor Profile: John Metcalf. Retrieved from https://idiyas.com/inventor/john-metcalf

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

Calculating rank

% Patents Active = 100.0

Average Co-Inventor Count = 2.0

ph-index = 1

Forward Citations = 2(Granted Patents)


Company Filing History:


Years Active: 1993

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1 patent (USPTO):Explore Patents

Title: The Innovative Genius of John Metcalf: A Journey in Applesauce Production

Introduction: John Metcalf, an inventor based in Danville, California, has made significant contributions to the food processing industry with his innovative approach to applesauce production. With a patent to his name, Metcalf's work showcases the importance of creativity and efficiency in food technology.

Latest Patents: John Metcalf holds a patent for a "System and method for producing applesauce." This patent describes an apparatus and method that utilizes unpeeled apples, which have been cored or reamed at the stem and blossom ends, to create applesauce. The process involves dividing the apples into portions, heating them to temperatures between 71°C and 73°C, and then separating the waste parts from the flesh. The apple flesh is processed further by pulping and heating to approximately 90°C to 104°C before being collected in an expansion chamber, resulting in a high-quality applesauce product.

Career Highlights: Metcalf is associated with California Processing Machinery, where he has applied his expertise in developing efficient food processing systems. His dedication to innovation has not only improved product quality but also streamlined the production process, reflecting his commitment to advancing the industry.

Collaborations: Throughout his career, John Metcalf has worked alongside talented individuals such as Raymond E Camezon. Their collaborative efforts have fostered a creative working environment that encourages innovative thinking and practical problem-solving in the field of food processing machinery.

Conclusion: John Metcalf's inventive spirit and dedication to improving applesauce production exemplify the role of inventors in driving innovation. His patented system not only enhances product quality but also showcases the potential of food technology advancements. As he continues his work at California Processing Machinery, Metcalf remains a vital figure in the industry, inspiring future generations of inventors to explore new possibilities in food processing.

Profile summary based on public USPTO records.
Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]
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