A process for the preparation of thin transparent coloured film filters useful for the determination of anionic and cationic pollutants in aqueous solutions and device therefor
| Ministry/ Department/ Residency | Ministry of Commerce & Industry |
| Branch | PATENT |
| From Year / Date (YYYY-MM-DD) |
1989 |
| To Year / Date (YYYY-MM-DD) |
1989 |
| Identifier | PR_000005018322 |
| File No./Reference No./Sheet No./Folio No. | 653/Del/1989 |
| Location | Repository III |
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