| 2244325 | Colloidal solutions of inorganic oxides | |||
| 2285449 | Method of producing sols and aerogels | |||
| 2285477 | ||||
| 2317891 | Waterproof adhesive composition | |||
| 2347733 | Switching device | |||
| 2361092 | Filter unit and process of making same | |||
| 2375738 | Preparation of sols | |||
| 2383653 | Silicic acid sols | |||
| 2387367 | Silicate base adhesive | |||
| 2443512 | Treatment of textile fibers |
| GB455565A |