Patent Explorer
Browse, filter, and analyze 12 patents across global jurisdictions.
| Patent Number | Title | Assignee | Status | Filing Date | Grant Date | Expires | Remaining | Claims | Actions |
|---|---|---|---|---|---|---|---|---|---|
| US4142417A | Multichannel infrared pyrometer | United States Department of the Interior | Expired / Lapsed | 1978-04-28 | 1979-03-06 | 1998-04-28 | 0.0 yrs | 7 | |
| US4057115A | Flexible shaft for a roof drill | United States Department of the Interior | Expired / Lapsed | 1976-05-07 | 1977-11-08 | 1996-05-07 | 0.0 yrs | 13 | |
| US4005012A | Semipermeable membranes and the method for the preparation thereof | United States Department of the Interior | Expired / Lapsed | 1975-09-22 | 1977-01-25 | 1995-09-22 | 0.0 yrs | 8 | |
| US3951549A | Transmitter-receiver system | United States Department of the Interior | Expired / Lapsed | 1974-08-20 | 1976-04-20 | 1994-08-20 | 0.0 yrs | 9 | |
| US3843540A | Production of magnetic fluids by peptization techniques | United States Department of the Interior | Expired / Lapsed | 1972-07-26 | 1974-10-22 | 1992-07-26 | 0.0 yrs | 2 | |
| US3809477A | Measuring apparatus for spatially modulated reflected beams | United States Department of the Interior | Expired / Lapsed | 1972-11-01 | 1974-05-07 | 1992-11-01 | 0.0 yrs | 12 | |
| US3745202A | Method of preparing an asymmetric membrane from a cellulose derivative | United States Department of the Interior | Expired / Lapsed | 1971-03-17 | 1973-07-10 | 1991-03-17 | 0.0 yrs | 0 | |
| US3661634A | Semipermeable osmotic membrane and method of producing same | United States Department of the Interior | Expired / Lapsed | 1969-10-31 | 1972-05-09 | 1989-10-31 | 0.0 yrs | 5 | |
| US3648845A | Thin film separation membranes and processes for making same | United States Department of the Interior | Expired / Lapsed | 1969-09-02 | 1972-03-14 | 1989-09-02 | 0.0 yrs | 10 | |
| US3479267A | Inorganic ion exchange membranes for use in electrical separatory processes | United States Department of the Interior | Expired / Lapsed | 1967-11-30 | 1969-11-18 | 1987-11-30 | 0.0 yrs | 0 | |
| US3479266A | Inorganic ion exchange membranes for use in electrical separatory processes | United States Department of the Interior | Expired / Lapsed | 1967-11-30 | 1969-11-18 | 1987-11-30 | 0.0 yrs | 0 | |
| US3372577A | Pressure measuring device employing a diaphragm and strain gages | United States Department of the Interior | Expired / Lapsed | 1967-01-12 | 1968-03-12 | 1987-01-12 | 0.0 yrs | 0 |