Permutit Co
Permutit CActive Patents
0
Total Holdings
27
Patent Holdings
Filter in Explorer →| Patent No. | Title | Status | Filing Date | Grant Date | Claims | Actions |
|---|---|---|---|---|---|---|
| US2677390A | Diaphragm valve | Expired / Lapsed | 1949-03-03 | 1954-05-04 | 0 | Details |
| US2643771A | Liquid treatment device | Expired / Lapsed | 1950-02-18 | 1953-06-30 | 0 | Details |
| US2628194A | Process of and apparatus for regenerating ion exchangers | Expired / Lapsed | 1950-12-28 | 1953-02-10 | 2 | Details |
| US2562730A | Filter tube | Expired / Lapsed | 1949-06-17 | 1951-07-31 | 0 | Details |
| US2562699A | Filter and method of backwashing same | Expired / Lapsed | 1949-06-17 | 1951-07-31 | 0 | Details |
| US2535181A | Turbidity detector | Expired / Lapsed | 1947-07-21 | 1950-12-26 | 0 | Details |
| US2469472A | Cation exchange materials | Expired / Lapsed | 1944-03-15 | 1949-05-10 | 0 | Details |
| US2463304A | Salt level indicator for brine tanks | Expired / Lapsed | 1946-06-20 | 1949-03-01 | 0 | Details |
| US2370772A | Apparatus for removing iron dissolved in water | Expired / Lapsed | 1941-07-12 | 1945-03-06 | 0 | Details |
| US2361235A | Turbidity detector | Expired / Lapsed | 1942-01-17 | 1944-10-24 | 0 | Details |
| US2328323A | Valve mechanism for water softeners | Expired / Lapsed | 1939-08-05 | 1943-08-31 | 0 | Details |
| US2323990A | Process for carrying out anion exchange reactions | Expired / Lapsed | 1941-05-13 | 1943-07-13 | 0 | Details |
| US2267841A | Method of and apparatus for treating water | Expired / Lapsed | 1940-06-14 | 1941-12-30 | 0 | Details |
| US2204062A | Water deaerator and purifier | Expired / Lapsed | 1937-07-10 | 1940-06-11 | 0 | Details |
| US2155318A | Processes for the deacidification of liquids, especially wa… | Expired / Lapsed | 1936-07-24 | 1939-04-18 | 0 | Details |
| US2122824A | Hardness testing in water softeners | Expired / Lapsed | 1935-11-22 | 1938-07-05 | 0 | Details |
| US2076322A | Water filter battery control | Expired / Lapsed | 1936-01-02 | 1937-04-06 | 0 | Details |
| US2076321A | Plural valve actuation and control | Expired / Lapsed | 1935-10-15 | 1937-04-06 | 0 | Details |
| US2069564A | Stabilizing base exchanging humates | Expired / Lapsed | 1935-07-31 | 1937-02-02 | 0 | Details |
| US2012194A | Water softening apparatus | Expired / Lapsed | 1927-06-06 | 1935-08-20 | 0 | Details |
| US1977781A | Dispensing apparatus | Expired / Lapsed | 1934-02-05 | 1934-10-23 | 0 | Details |
| US1977498A | Flow meter | Expired / Lapsed | 1930-09-30 | 1934-10-16 | 0 | Details |
| US1910361A | Chart recording meter | Expired / Lapsed | 1930-08-08 | 1933-05-23 | 0 | Details |
| US1910004A | Automatic water softener | Expired / Lapsed | 1927-06-13 | 1933-05-23 | 0 | Details |
| US1910011A | Automatic, semiautomatic or time controlled water softener | Expired / Lapsed | 1926-07-19 | 1933-05-23 | 0 | Details |
| US1787008A | Process for increasing base-exchanging properties | Expired / Lapsed | 1927-02-02 | 1930-12-30 | 0 | Details |
| US1354604A | Process of and apparatus for softening water | Expired / Lapsed | 1917-09-26 | 1920-10-05 | 0 | Details |