Hans-Ulrich Hafner

This inventor holds 5 USPTO granted patents. Top assignees: Leybold Aktiengesellschaft, Leybold Vakuum Gmbh. Active years: 1990-2001.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Hans-Ulrich Hafner. Retrieved from https://idiyas.com/inventor/hans-ulrich-hafner

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

USPTO Granted Patents = 5

% Patents Active = 100.0

Average Co-Inventor Count = 2.7

ph-index = 5

Forward Citations = 71(Granted Patents)

Location History:

Koln, DE (1990 - 1995)
Cologne, DE (1992 - 2001)

Company Filing History:

3 out of 393

Leybold Aktiengesellschaft

Years Active: 1990-2001

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5 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 6263677 - Multistage low-temperature refrigeration machine (2001-07-24),

2. 6065295 - Low-temperature refrigerator with cold head and a process for optimizing (2000-05-23),

3. 5400604 - Cryopump and process for regenerating said cryopump (1995-03-28),

4. 5111667 - Two-stage cryopump (1992-05-12),

5. 4953359 - Method of adapting a two-stage refrigerator cryopump to a specific gas (1990-09-04),

Title: The Innovations of Hans-Ulrich Hafner

Introduction

Hans-Ulrich Hafner is a notable inventor based in Cologne, Germany. He has made significant contributions to the field of refrigeration technology, holding a total of 5 patents. His work focuses on enhancing the efficiency and functionality of refrigeration systems.

Latest Patents

One of his latest patents is a multistage low-temperature refrigeration machine. This invention relates to a refrigeration system that includes a displacer refrigerator as the first stage and at least one additional stage in the form of a pulse tube refrigerator. To minimize vibrations, Hafner proposes the use of a flexible component designed to prevent the spread of vibrations between the displacer refrigerator and the pulse tube refrigerator. Another notable patent is for a low-temperature refrigerator with a cold head, along with a process for optimizing its performance.

Career Highlights

Hafner has worked with prominent companies in the industry, including Leybold Aktiengesellschaft and Leybold Vakuum GmbH. His experience in these organizations has allowed him to develop innovative solutions in refrigeration technology.

Collaborations

Throughout his career, Hafner has collaborated with several professionals, including Hans-Joachim Forth and Hans-Hermann Klein. These collaborations have contributed to the advancement of his inventions and patents.

Conclusion

Hans-Ulrich Hafner's contributions to refrigeration technology are noteworthy, with multiple patents that reflect his innovative spirit. His work continues to influence the industry and improve refrigeration systems worldwide.

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]