Fritzvold; Bjorn H.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Fritzvold; Bjorn H..The latest application filed is for "method for bleaching oxygen delignified cellulose-containing pulp with ozone and peroxide".
- Fritzvold; Bjorn H. - Hosle NO
- Fritzvold; Bjorn H. - Oslo NO
| Patent | Date |
|---|---|
| Method for bleaching oxygen delignified cellulose-containing pulp with ozone and peroxide Grant 4,450,044 - Fritzvold , et al. May 22, 1 | 1984-05-22 |
| Method for treating refined mechanical pulp and thermo mechanical pulp with ozone Grant 4,279,694 - Fritzvold , et al. July 21, 1 | 1981-07-21 |
| Method and an apparatus for processing finely divided fibrous pulp with gas without overpressure Grant 4,123,317 - Fritzvold , et al. October 31, 1 | 1978-10-31 |
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