MSA Safety Inc
MSA SafetyActive Patents
0
Total Holdings
55
Patent Holdings
Filter in Explorer →| Patent No. | Title | Status | Filing Date | Grant Date | Claims | Actions |
|---|---|---|---|---|---|---|
| US4799374A | Liquid separator | Expired / Lapsed | 1987-11-13 | 1989-01-24 | 6 | Details |
| US3730180A | Pneumatically operated ventilator | Expired / Lapsed | 1970-10-21 | 1973-05-01 | 12 | Details |
| US3655346A | Emergency breathing apparatus | Expired / Lapsed | 1970-02-19 | 1972-04-11 | 4 | Details |
| US3638496A | Pressure transducer | Expired / Lapsed | 1970-06-15 | 1972-02-01 | 4 | Details |
| US3566387A | Monitoring device for positive pressure breathing apparatus | Expired / Lapsed | 1967-11-14 | 1971-02-23 | 0 | Details |
| US3471698A | Infrared detection of surface contamination | Expired / Lapsed | 1967-02-02 | 1969-10-07 | 0 | Details |
| US3399398A | Combustible gas monitoring system | Expired / Lapsed | 1965-07-27 | 1968-08-27 | 2 | Details |
| US3359984A | Electrical circuit for ventricular defibrillator | Expired / Lapsed | 1964-11-03 | 1967-12-26 | 2 | Details |
| US3350175A | Colorimetric indicator device for the determination of gases | Expired / Lapsed | 1963-07-02 | 1967-10-31 | 2 | Details |
| US3338239A | Surgical puncturing device | Expired / Lapsed | 1964-10-08 | 1967-08-29 | 2 | Details |
| US3332118A | Safety line with safety anchor | Expired / Lapsed | 1965-06-11 | 1967-07-25 | 2 | Details |
| US3319627A | Intermittent positive pressure breathing apparatus | Expired / Lapsed | 1964-02-20 | 1967-05-16 | 2 | Details |
| US3241555A | Charging and discharging circuit for ventricular defibrilla… | Expired / Lapsed | 1962-06-25 | 1966-03-22 | 2 | Details |
| US3224447A | Electrodes for ventricular defibrillator | Expired / Lapsed | 1962-06-25 | 1965-12-21 | 2 | Details |
| US3211154A | Sequence switch for ventricular defibrillator | Expired / Lapsed | 1962-06-25 | 1965-10-12 | 2 | Details |
| US3147465A | Methane alarm and control system | Expired / Lapsed | 1960-12-27 | 1964-09-01 | 2 | Details |
| US3138152A | Positive pressure breathing apparatus | Expired / Lapsed | 1962-07-03 | 1964-06-23 | 2 | Details |
| US3093136A | Ventricular defibrillator | Expired / Lapsed | 1960-05-25 | 1963-06-11 | 2 | Details |
| US3068073A | Determination of carbon dioxide | Expired / Lapsed | 1960-04-22 | 1962-12-11 | 2 | Details |
| US3037637A | Spiral roll filter unit | Expired / Lapsed | 1960-04-26 | 1962-06-05 | 0 | Details |
| US2983303A | Method and apparatus for making preforms from fibers | Expired / Lapsed | 1958-01-27 | 1961-05-09 | 0 | Details |
| US2963351A | Determination of nitrogen dioxide | Expired / Lapsed | 1959-11-10 | 1960-12-06 | 2 | Details |
| US2852023A | Closed circuit breathing apparatus | Expired / Lapsed | 1956-11-06 | 1958-09-16 | 0 | Details |
| US2831351A | Electrical system for measuring the rate of motion of a flu… | Expired / Lapsed | 1954-11-18 | 1958-04-22 | 0 | Details |
| US2829908A | Rock dust collecting apparatus | Expired / Lapsed | 1956-03-08 | 1958-04-08 | 0 | Details |
| US2824558A | Ear plug | Expired / Lapsed | 1956-05-24 | 1958-02-25 | 0 | Details |
| US2823985A | Oxygen indicating apparatus | Expired / Lapsed | 1954-03-25 | 1958-02-18 | 0 | Details |
| US2799522A | Shaft seal | Expired / Lapsed | 1954-01-07 | 1957-07-16 | 0 | Details |
| US2736638A | Detection of sulfur dioxide | Expired / Lapsed | 1953-07-14 | 1956-02-28 | 2 | Details |
| US2687342A | Method and apparatus for testing gas | Expired / Lapsed | 1952-10-15 | 1954-08-24 | 1 | Details |
| US2531592A | Method and apparatus for gas analysis | Expired / Lapsed | 1945-03-13 | 1950-11-28 | 4 | Details |
| US2494131A | Oxygen generating canister | Expired / Lapsed | 1944-11-27 | 1950-01-10 | 2 | Details |
| US2469064A | Adhesive compress | Expired / Lapsed | 1945-02-07 | 1949-05-03 | 0 | Details |
| US2464087A | Method for determining oxygen in gases | Expired / Lapsed | 1943-05-22 | 1949-03-08 | 0 | Details |
| US2400076A | Air purifying and filtering apparatus | Expired / Lapsed | 1939-08-12 | 1946-05-14 | 0 | Details |
| US2312227A | Protective hat | Expired / Lapsed | 1940-08-03 | 1943-02-23 | 0 | Details |
| US2299520A | Method of making extensible conduit | Expired / Lapsed | 1940-02-28 | 1942-10-20 | 0 | Details |
| US2292003A | Valve | Expired / Lapsed | 1939-10-12 | 1942-08-04 | 0 | Details |
| US2263205A | Apparatus for the treatment of skin diseases | Expired / Lapsed | 1939-03-24 | 1941-11-18 | 0 | Details |
| US2234499A | Air testing device | Expired / Lapsed | 1939-09-12 | 1941-03-11 | 0 | Details |
| US2219391A | Combustible gas alarm and control | Expired / Lapsed | 1936-08-06 | 1940-10-29 | 0 | Details |
| US2206684A | Filter element | Expired / Lapsed | 1938-04-26 | 1940-07-02 | 0 | Details |
| US2174349A | Gas analysis | Expired / Lapsed | 1935-07-13 | 1939-09-26 | 0 | Details |
| US2156693A | Gas testing | Expired / Lapsed | 1936-11-12 | 1939-05-02 | 0 | Details |
| US2149441A | Gas testing method and apparatus | Expired / Lapsed | 1936-01-11 | 1939-03-07 | 0 | Details |
| US2123275A | Protective headgear | Expired / Lapsed | 1936-06-01 | 1938-07-12 | 0 | Details |
| US2115065A | Headger | Expired / Lapsed | 1936-10-15 | 1938-04-26 | 0 | Details |
| US2114401A | Gas testing | Expired / Lapsed | 1936-07-15 | 1938-04-19 | 0 | Details |
| US2108256A | Breathing apparatus | Expired / Lapsed | 1936-05-13 | 1938-02-15 | 0 | Details |
| US2025772A | Protective headgear | Expired / Lapsed | 1934-05-19 | 1935-12-31 | 0 | Details |
| US2019928A | Respirator | Expired / Lapsed | 1934-12-18 | 1935-11-05 | 0 | Details |
| US1875024A | Apparatus for treating exhaust gases of internal combustion… | Expired / Lapsed | 1929-01-11 | 1932-08-30 | 0 | Details |
| US1835883A | Helmet | Expired / Lapsed | 1930-03-20 | 1931-12-08 | 0 | Details |
| US1725893A | Indicating gas-mask canister | Expired / Lapsed | 1925-03-25 | 1929-08-27 | 0 | Details |
| US1328057A | Mouthpiece for breathing apparatus | Expired / Lapsed | 1919-05-15 | 1920-01-13 | 0 | Details |