For the Inventor, By the Inventor

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Allentown, PA, United States of America

Apd Cryogenics, Inc.

USPTO Granted Patents = 22

CIPO Patents = 1

Trademarks = 5

Forward Citations = 498

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19 inventors (with patents filed for the assignee):

Ralph C Longsworth (17 out of 73 patents)

Boris V Yudin (5 out of 7 patents)

Ajay N Khatri (4 out of 7 patents)

4. Dennis H Hill (3 out of 5 patents)

5. Mikhail Boiarski (3 out of 3 patents)

6. William A Steyert (3 out of 9 patents)

7. Mikhail Boyarsky (2 out of 3 patents)

8. Glenn Bonney (1 out of 1 patent)

9. Larry Klusmier (1 out of 1 patent)

10. Victor I Mogorychny (1 out of 1 patent)

11. Richard Stevenson (1 out of 4 patents)

12. Oleg N Podcherniev (1 out of 2 patents)

13. Michael Boiarski (1 out of 2 patents)

14. Mikhail J Boiarsky (1 out of 1 patent)

15. Francis T Lotz (1 out of 1 patent)

22 patents: Sort by Forward Citations

1. 5875651 - Low vibration throttling device for throttle-cycle refrigerators (1999-03-02),

2. 5729993 - Precooled vapor-liquid refrigeration cycle (1998-03-24),

3. 5706663 - High efficiency throttle cryogenic refrigerator based on one stage (1998-01-13),

4. 5687574 - Throttle cycle cryopumping system for Group I gases (1997-11-18),

5. 5628195 - Vibrationally isolated thermal system for a cryogenically cooled device (1997-05-13),

6. 5595065 - Closed cycle cryogenic refrigeration system with automatic variable flow (1997-01-21),

7. 5579654 - Cryostat refrigeration system using mixed refrigerants in a closed vapor (1996-12-03),

8. 5461873 - Means and apparatus for convectively cooling a superconducting magnet (1995-10-31),

9. 5457961 - Crysostat for very stable temperature maintenance (1995-10-17),

10. 5452582 - Cryo-probe (1995-09-26),

11. 5441658 - Cryogenic mixed gas refrigerant for operation within temperature ranges (1995-08-15),

12. 5425890 - Substitute refrigerant for dichlorodifluoromethane refrigeration systems (1995-06-20),

13. 5402648 - Sealed dewar with separate circulation loop for external cooling at (1995-04-04),

14. 5385027 - Continuous flow cryogen sublimation cooler (1995-01-31),

15. 5337572 - Cryogenic refrigerator with single stage compressor (1994-08-16),

APD Cryogenics, Inc. specializes in designing and manufacturing cryogenic equipment for a variety of industries, including semiconductor, aerospace, and research. With over 30 years of experience, APD Cryogenics is known for their high-quality products and expertise in cryogenic technology. They offer a wide range of cryogenic solutions, from cryopumps to cryogenic cooling systems, to meet the unique needs of their customers.

This text is generated by artificial intelligence and may not be accurate.

Company Badge

USPTO Data Jan 1 1976 - Dec 2 2025

22 Patents

#8 in Allentown, PA

#543 in Pennsylvania

#14,497 in US

#27,846 in the World

Allentown, PA, United States of America

Apd Cryogenics, Inc.

Forward Citations = 498

19 inventors:

Ralph C Longsworth (17 out of 73 patents)

Boris V Yudin (5 out of 7 patents)

Ajay N Khatri (4 out of 7 patents)

4. Dennis H Hill (3 out of 5 patents)

5. Mikhail Boiarski (3 out of 3 patents)

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