Issued Patents All Time
Showing 76–100 of 101 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5681791 | Color former mixture | Rudolf Zink | 1997-10-28 |
| 5670082 | Bleaching auxiliary | Albert Stehlin, Thomas Maier | 1997-09-23 |
| 5646271 | Bleaching auxiliary | Albert Stehlin, Thomas Maier | 1997-07-08 |
| 5509481 | Method of perforating including an automatic release apparatus suspending by wireline or coiled tubing in a wellbore for perforating a long length interval of the wellbore in a single run using a gun string longer than a wellhead lubricator | Joe C. Hromas | 1996-04-23 |
| 5505261 | Firing head connected between a coiled tubing and a perforating gun adapted to move freely within a tubing string and actuated by fluid pressure in the coiled tubing | A. Glen Edwards, Thomas M. Sayers, Edward G. Smith, Jr. | 1996-04-09 |
| 5429192 | Method and apparatus for anchoring a perforating gun to a casing in a wellbore including a primary and a secondary anchor release mechanism | Joe C. Hromas, A. Glen Edwards | 1995-07-04 |
| 5421870 | Concentrated aqueous liquid formulations of color formers | Roger Scartazzini | 1995-06-06 |
| 5366013 | Shock absorber for use in a wellbore including a frangible breakup element preventing shock absorption before shattering allowing shock absorption after shattering | A. Glen Edwards, Joe C. Hromas, Edward G. Smith, Jr. | 1994-11-22 |
| 5318126 | Explosively opened production valve including a frangible breakup element operated by tubing pressure or rathole pressure or both | A. Glen Edwards, Joe C. Hromas | 1994-06-07 |
| 5293940 | Automatic tubing release | Joe C. Hromas, Antoni Miszewski | 1994-03-15 |
| 5277262 | Hydraulic safety pin and method of operating a pressure-controlled device | A. Glen Edwards, Edward G. Smith, Jr. | 1994-01-11 |
| 5216197 | Explosive diode transfer system for a modular perforating apparatus | Antoni Miszewski | 1993-06-01 |
| 5203414 | Method of anchoring a device in a wellbore including opening an orifice between two chambers in response to an electrical signal and moving a piston in response to hydrostatic pressure when the orifice is opened | Joe C. Hromas, A. Glen Edwards | 1993-04-20 |
| 5191933 | Wellbore apparatus including a rathole pressure balanced-differential pressure firing system | A. Glen Edwards, Joe C. Hromas, Antoni Miszewski, William McGinley Hill | 1993-03-09 |
| 5191936 | Method and apparatus for controlling a well tool suspended by a cable in a wellbore by selective axial movements of the cable | A. Glen Edwards, Antoni Miszewski | 1993-03-09 |
| 5158142 | Apparatus for releasing a pipe string from an object stuck downhole by continuously applying tension to said apparatus | Antoni Miszewski, Joe C. Hromas | 1992-10-27 |
| 5146983 | Hydrostatic setting tool including a selectively operable apparatus initially blocking an orifice disposed between two chambers and opening in response to a signal | Joe C. Hromas, A. Glen Edwards | 1992-09-15 |
| 5131470 | Shock energy absorber including collapsible energy absorbing element and break up of tensile connection | Antoni Miszewski | 1992-07-21 |
| 5095993 | Anchor apparatus for a tubing and wireline conveyed method and apparatus | Joe C. Hromas, Arnold G. Edwards | 1992-03-17 |
| 5088413 | Method and apparatus for safe transport handling arming and firing of perforating guns using a bubble activated detonator | Nolan C. Lerche, Arnold G. Edwards, Kenneth E. Rozek, Edward G. Smith, Jr. | 1992-02-18 |
| 5058680 | Method of detonating a perforating apparatus on a tubing including lowering one end of a pump and a firing head into said tubing | A. Glen Edwards, William McGinley Hill, Antoni Miszewski | 1991-10-22 |
| 5050682 | Coupling apparatus for a tubing and wireline conveyed method and apparatus | Joe C. Hromas, Arnold G. Edwards | 1991-09-24 |
| 5050672 | Pump apparatus including a firing head for use with a perforating gun on a tubing string | A. Glen Edwards, William McGinley Hill, Antoni Miszewski | 1991-09-24 |
| 5040597 | Well apparatus including a pump and a firing head adapted to be inserted into a tubing which includes a perforating gun | A. Glen Edwards, William McGinley Hill, Antoni Miszewski | 1991-08-20 |
| 5033553 | Intra-perforating gun swivel | Antoni Miszewski | 1991-07-23 |