United States Department of the Interior
United StaActive Patents
0
Total Holdings
27
Patent Holdings
Filter in Explorer →| Patent No. | Title | Status | Filing Date | Grant Date | Claims | Actions |
|---|---|---|---|---|---|---|
| US4847047A | Enhancement of titanium-aluminum alloying by ultrasonic tre… | Expired / Lapsed | 1987-05-29 | 1989-07-11 | 11 | Details |
| US4663893A | End deflector for abrasive water jet slot cutter | Expired / Lapsed | 1985-12-16 | 1987-05-12 | 13 | Details |
| US4142417A | Multichannel infrared pyrometer | Expired / Lapsed | 1978-04-28 | 1979-03-06 | 7 | Details |
| US4120694A | Process for purifying a titanium-bearing material and upgra… | Expired / Lapsed | 1977-09-06 | 1978-10-17 | 15 | Details |
| US4098956A | Spectrally selective solar absorbers | Expired / Lapsed | 1976-08-11 | 1978-07-04 | 8 | Details |
| US4057115A | Flexible shaft for a roof drill | Expired / Lapsed | 1976-05-07 | 1977-11-08 | 13 | Details |
| US4039440A | Reverse osmosis membrane | Expired / Lapsed | 1975-01-16 | 1977-08-02 | 6 | Details |
| US4005012A | Semipermeable membranes and the method for the preparation … | Expired / Lapsed | 1975-09-22 | 1977-01-25 | 8 | Details |
| US3951549A | Transmitter-receiver system | Expired / Lapsed | 1974-08-20 | 1976-04-20 | 9 | Details |
| US3843540A | Production of magnetic fluids by peptization techniques | Expired / Lapsed | 1972-07-26 | 1974-10-22 | 2 | Details |
| US3809477A | Measuring apparatus for spatially modulated reflected beams | Expired / Lapsed | 1972-11-01 | 1974-05-07 | 12 | Details |
| US3760949A | Sealing means for hollow fiber bundles | Expired / Lapsed | 1971-08-13 | 1973-09-25 | 8 | Details |
| US3745202A | Method of preparing an asymmetric membrane from a cellulose… | Expired / Lapsed | 1971-03-17 | 1973-07-10 | 0 | Details |
| US3662046A | Method of making reverse osmosis membranes for desalination… | Expired / Lapsed | 1970-06-03 | 1972-05-09 | 0 | Details |
| US3661634A | Semipermeable osmotic membrane and method of producing same | Expired / Lapsed | 1969-10-31 | 1972-05-09 | 5 | Details |
| US3648845A | Thin film separation membranes and processes for making same | Expired / Lapsed | 1969-09-02 | 1972-03-14 | 10 | Details |
| US3607329A | Cellulose acetate butyrate semipermeable membranes and thei… | Expired / Lapsed | 1969-04-22 | 1971-09-21 | 9 | Details |
| US3552754A | Tube plate seal | Expired / Lapsed | 1969-09-15 | 1971-01-05 | 0 | Details |
| US3479266A | Inorganic ion exchange membranes for use in electrical sepa… | Expired / Lapsed | 1967-11-30 | 1969-11-18 | 0 | Details |
| US3479267A | Inorganic ion exchange membranes for use in electrical sepa… | Expired / Lapsed | 1967-11-30 | 1969-11-18 | 0 | Details |
| US3412613A | Device for taking fluid samples from closed systems | Expired / Lapsed | 1966-08-11 | 1968-11-26 | 0 | Details |
| US3385786A | System for biological treatment of sewage | Expired / Lapsed | 1966-10-28 | 1968-05-28 | 0 | Details |
| US3372577A | Pressure measuring device employing a diaphragm and strain … | Expired / Lapsed | 1967-01-12 | 1968-03-12 | 0 | Details |
| US2590104A | Direct-coupled amplifier | Expired / Lapsed | 1950-11-03 | 1952-03-25 | 0 | Details |
| US2482127A | Apparatus for refining metals | Expired / Lapsed | 1946-08-07 | 1949-09-20 | 0 | Details |
| US2444457A | Metal lens holder | Expired / Lapsed | 1947-07-07 | 1948-07-06 | 0 | Details |
| US2442790A | Method for identifying cross wires in optical instrument re… | Expired / Lapsed | 1945-08-13 | 1948-06-08 | 0 | Details |