Company Filing History:

12 out of 3,106

Konica Corporation

patents

3 out of 713

Konica-minolta Holdings, Inc.

patents

Years Active: 1990-2007

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15 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 7250078 - Ink-jet ink and ink-jet recording method (2007-07-31),

2. 7201793 - Ink-jet ink and ink-jet recording method (2007-04-10),

3. 7080899 - Ink jet recording apparatus and ink jet recording method (2006-07-25),

4. 6733113 - Ink-jet recording method and ink-jet recording apparatus (2004-05-11),

5. 6511171 - Ink set for an ink-jet recording method (2003-01-28),

6. 5728513 - Silver halide color photographic light sensitive material (1998-03-17),

7. 5693457 - Silver halide color photographic light sensitive material (1997-12-02),

8. 5608058 - Processing for purifying crown compounds (1997-03-04),

9. 5374512 - Silver halide photographic emulsion (1994-12-20),

10. 5324625 - Silver halide color photographic light-sensitive material (1994-06-28),

11. 5290669 - Silver halide color photographic light-sensitive material (1994-03-01),

12. 5208137 - Silver halide photographic light-sensitive material (1993-05-04),

13. 5204236 - Silver halide photographic materials (1993-04-20),

14. 4996138 - Silver halide photographic light-sensitive material (1991-02-26),

15. 4960686 - Silver halide photographic light-sensitive material containing oxonol dye (1990-10-02),

Title: Yasuhiko Kawashima: Innovator in Ink-Jet Technology

Introduction

Yasuhiko Kawashima is a prominent inventor based in Iruma, Japan. He has made significant contributions to the field of ink-jet technology, holding a total of 15 patents. His work has been instrumental in advancing the capabilities and applications of ink-jet recording methods.

Latest Patents

Kawashima's latest patents focus on innovative ink formulations for ink-jet recording. One of his notable inventions is an ink that contains a colorant and a solvent mixture, which includes water and a non-water solvent. This solvent has specific properties, such as a surface tension of 25 to 40 mN/m at 25°C, a viscosity ranging from 1 to 50 mPs·s, and a vapor pressure not exceeding 133 Pa at 25°C. The ink composition consists of 50 to 90 weight % of the non-water solvent and 10 to 45 weight % of water. Another patent involves a unique combination of two solvents, where solvent B has a higher vapor pressure than solvent A. This formulation allows for a maximum viscosity by adjusting the mixing ratio of the two solvents, ensuring optimal performance in ink-jet applications.

Career Highlights

Throughout his career, Kawashima has worked with notable companies in the industry, including Konica Corporation and Konica Minolta Holdings, Inc. His experience in these organizations has allowed him to refine his expertise in ink technology and contribute to various innovative projects.

Collaborations

Kawashima has collaborated with talented individuals in his field, including Nobuaki Kagawa and Tomomi Yoshizawa. These partnerships have fostered a creative environment that has led to the development of groundbreaking technologies in ink-jet recording.

Conclusion

Yasuhiko Kawashima's contributions to ink-jet technology have significantly impacted the industry. His innovative patents and collaborations highlight his dedication to advancing this field. His work continues to inspire future developments in ink-jet recording methods.

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