Wellinga; Kobus
Patent Applications and Registrations
Patent applications and USPTO patent grants for Wellinga; Kobus.The latest application filed is for "organic compounds derived from urea or thiourea".
- Wellinga; Kobus - Weesp NL
| Patent | Date |
|---|---|
| Organic compounds derived from urea or thiourea Grant 5,245,071 - Wellinga , et al. September 14, 1 | 1993-09-14 |
| Insecticidal use of ureas and thioureas Grant 4,607,044 - Wellinga , et al. August 19, 1 | 1986-08-19 |
| Benzoyl phenyl urea derivatives having insecticidal activities Grant 4,013,717 - Wellinga , et al. March 22, 1 | 1977-03-22 |
| Novel pyrazoline compounds having insecticidal activity Grant 4,010,271 - Mulder , et al. March 1, 1 | 1977-03-01 |
| Substituted benzoyl ureas Grant 3,933,908 - Wellinga , et al. January 20, 1 | 1976-01-20 |
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