Company Filing History:

12 out of 622

Mitsubishi Paper Mills Limited

patents

1 out of 2

501 Mitsubishi Paper Mills, Ltd.

patents

1 out of 1,379

Mitsui Toatsu Chemicals, Incorporated

patents

where one patent can have more than one assignee

Years Active: 1981-1994

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13 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 5306688 - Salicylic acid derivatives, the process for preparing the same and the (1994-04-26),

2. 5063197 - Heat-sensitive recording material (1991-11-05),

3. 4999332 - Heat-sensitive recording material (1991-03-12),

4. 4923845 - Heat-sensitive recording material (1990-05-08),

5. 4737587 - Colorless carbazole dyes for recording materials (1988-04-12),

6. 4711749 - Process for producing microcapsules (1987-12-08),

7. 4594269 - Chemically resistant thermosensitive recording paper (1986-06-10),

8. 4533599 - Microcapsule and process for their production (1985-08-06),

9. 4436783 - Thermosensitive recording material (1984-03-13),

10. 4415627 - Chemically resistant thermosensitive recording paper (1983-11-15),

11. 4396684 - Heat-sensitive recording paper causing reduced thermal head abrasion (1983-08-02),

12. 4320039 - Heat-sensitive recording composition with improved image stability (1982-03-16),

13. 4265978 - Heat-sensitive recording paper improved in keeping quality of ground (1981-05-05),

Title: Fumio Okumura: Innovator in Heat-Sensitive Recording Materials

Introduction

Fumio Okumura is a notable inventor based in Kunitachi, Japan. He has made significant contributions to the field of heat-sensitive recording materials, holding a total of 13 patents. His work has advanced the technology used in various applications, particularly in the printing industry.

Latest Patents

Among his latest patents, Okumura has developed salicylic acid derivatives and processes for preparing them. One of his notable inventions is a heat-sensitive recording material that comprises a color-forming, electron-donating compound and a salicylic acid derivative. This innovative material allows for the creation of images upon heating, utilizing a specific combination of components to achieve excellent heat responsiveness. The resulting images maintain a sufficient optical density even when printed with low energy.

Career Highlights

Fumio Okumura has worked with prominent companies such as Mitsubishi Paper Mills Limited and 501 Mitsubishi Paper Mills, Ltd. His experience in these organizations has contributed to his expertise in developing advanced materials for various applications.

Collaborations

Throughout his career, Okumura has collaborated with notable individuals, including Masahiro Higuchi and Sadao Morishita. These partnerships have fostered innovation and the development of new technologies in the field.

Conclusion

Fumio Okumura's contributions to the field of heat-sensitive recording materials have made a lasting impact. His innovative patents and collaborations highlight his role as a key figure in advancing technology in this area.

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