Friedrich; Ralph S.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Friedrich; Ralph S..The latest application filed is for "mortar-coated steel pipes and methods of making the same".
- Friedrich; Ralph S. - Hermosa Beach CA US
- Friedrich; Ralph S. - Wichita Falls TX
| Patent | Date |
|---|---|
| Fiber reinforced resin polymer mortar pole Grant 9,879,440 - Friedrich , et al. January 30, 2 | 2018-01-30 |
| Fiber reinforced resin polymer mortar pole Grant 9,057,204 - Friedrich , et al. June 16, 2 | 2015-06-16 |
| Mortar-coated steel pipes and methods of making the same Grant 8,944,114 - Mueller , et al. February 3, 2 | 2015-02-03 |
| Pressure cast concrete or mortar lined steel pipes and methods of making the same Grant 8,627,854 - Friedrich , et al. January 14, 2 | 2014-01-14 |
| Mortar-coated Steel Pipes And Methods Of Making The Same App 20120315095 - Mueller; Richard I. ; et al. | 2012-12-13 |
| Pressure Cast Concrete Or Mortar Lined Steel Pipes And Methods Of Making The Same App 20120152396 - Friedrich; Ralph S. ; et al. | 2012-06-21 |
| Pressure cast concrete or mortar lined steel pipes and methods of making the same Grant 8,069,880 - Friedrich , et al. December 6, 2 | 2011-12-06 |
| Fiber Reinforced Resin Polymer Mortar Pole App 20110132524 - Friedrich; Ralph S. ; et al. | 2011-06-09 |
| Pressure Cast Concrete Or Mortar Lined Steel Pipes And Methods Of Making The Same App 20090250135 - Friedrich; Ralph S. ; et al. | 2009-10-08 |
| Fiber Reinforced Resin Polymer Mortar Pole App 20080087371 - Friedrich; Ralph S. ; et al. | 2008-04-17 |
| Method for forming double containment pipeline sections Grant 7,166,177 - Friedrich , et al. January 23, 2 | 2007-01-23 |
| Sewer pipe section Grant 6,920,900 - Friedrich July 26, 2 | 2005-07-26 |
| Abrasion resistant pipe Grant 6,737,134 - Friedrich , et al. May 18, 2 | 2004-05-18 |
| Method for forming double containment pipeline sections App 20040089405 - Friedrich, Ralph S. ; et al. | 2004-05-13 |
| Closure for secondary containment pipe Grant 6,626,467 - Folkers , et al. September 30, 2 | 2003-09-30 |
| Sewer pipe section App 20030178079 - Friedrich, Ralph S. | 2003-09-25 |
| Abrasion Restistant Pipe App 20020004116 - FRIEDRICH, RALPH S. ; et al. | 2002-01-10 |
| Double containment pipe sections Grant 6,026,862 - Friedrich , et al. February 22, 2 | 2000-02-22 |
| Fire resistant pipe Grant 5,799,705 - Friedrich , et al. September 1, 1 | 1998-09-01 |
| Fire resistant pipe Grant 5,758,694 - Friedrich , et al. June 2, 1 | 1998-06-02 |
| Fiber-reinforced resin pipe having improved impact resistance Grant 5,725,920 - Friedrich , et al. March 10, 1 | 1998-03-10 |
| Fiber reinforced plastic pipe tee Grant 4,601,496 - Ulrich , et al. July 22, 1 | 1986-07-22 |
| Filament winding of plastic articles Grant 4,557,788 - Dana , et al. December 10, 1 | 1985-12-10 |
| Fiber reinforced plastic pipe tee Grant 4,506,918 - Friedrich , et al. March 26, 1 | 1985-03-26 |
| Winding fiber reinforced pipe fittings Grant 4,437,616 - Magarian , et al. March 20, 1 | 1984-03-20 |
| SEC | 0001251193 | FRIEDRICH RALPH S |
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