Patents by Inventor Daniel Stec, III
Daniel Stec, III has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
-
Patent number: 9296241Abstract: A method of forming a very small, i.e. microliter, finely detailed explosive train for the ignition of energetic munitions—which train is formed by ink jetting picoliter volume droplets of an explosive ink onto the substrate; which explosive ink is a pure liquid that will not clog the ink jet printer. The explosive ink being a solution composed of a secondary organic explosive solute, a polymeric binder solute, and a polar aprotic organic solvent. Where the ink jet printer is a commercial piezoelectric type, drop-on-demand, ink jet printer capable of precisely delivering the subject picoliter volume droplets. And, which printer is capable of heating said substrate to an elevated temperature to more rapidly evaporate the solvent, leaving the desired, finely detailed, efficacious, crystalline explosive train.Type: GrantFiled: November 13, 2013Date of Patent: March 29, 2016Assignee: The United States of America as Represented by the Secretary of the ArmyInventors: Andrew C. Ihnen, Woo Young Lee, Brian Fuchs, Anne Marie Petrock, Daniel Stec, III
-
Patent number: 8636861Abstract: Secondary crystalline high explosives are disclosed which are suitable for filling very small volume loading holes in micro-electric initiators for micro-electro-mechanical mechanisms (MEMS), used as safe and arm (S&A) devices. The explosives are prepared by adding the such a high explosive to an aqueous first volatile mobile phase, adding such a high explosive to a non-aqueous second volatile mobile phase, mixing the first and second volatile mobile phases and then loading the combined phases into the MEMS device and allowing the aqueous and non-aqueous solvents to evaporate depositing the high explosive. Enhanced adhesion between the deposited high explosive and enhanced rheological properties can be obtained by adding a polymeric binder to both mobile phases.Type: GrantFiled: December 29, 2010Date of Patent: January 28, 2014Assignee: The United States of America as represented by the Secretary of the ArmyInventors: Daniel Stec, III, Amy Wilson, Brian E. Fuchs, Neha Mehta, Paula Cook
-
Patent number: 8573123Abstract: A method of forming a conductive ink bridge wire EED on either a flat or curved substrate, wherein a finely detailed bridge wire EED is printed on the substrate using a nano-particle conductive material applied with a commercially available piezoelectric drop-on-demand ink jet printer—which bridge wire is subsequently coated with a first primary explosive layer, an optional second transition explosive layer, and a third secondary explosive layer—such that upon creating a current through the bridge wire EED, the bridge wire is heated and the explosive layers detonate in turn, and in turn initiate the detonation of the device to which the detonator is attached.Type: GrantFiled: May 17, 2011Date of Patent: November 5, 2013Assignee: The United States of America as Represented by the Secretary of the ArmyInventors: Brian E. Fuchs, James L. Zunino, III, Daniel P. Schmidt, Daniel Stec, III, Anne Marie Petrock
-
Patent number: 8466317Abstract: A method for preparing an insensitive bis(2,2-dinitropropyl)nitramine (BDNPN) as a fine powder which exhibits desirable insensitive munitions (IM) characteristics for use alone or compounded with other energetic materials such as RDX.Type: GrantFiled: July 6, 2011Date of Patent: June 18, 2013Assignee: The United States of America as Represented by the Secretary of the ArmyInventors: Daniel Stec, III, Kathy Yang, Gartung Cheng, Neha Mehta, Paritosh R. Dave
-
Patent number: 7981225Abstract: A lead-free primer energetic composition including Cyanuric Triazide (60%), Tetracene (5%), Barium Nitrate (20%) and Antimony Trisulfide (15%) is produced. The lead-free primer energetic composition is used to construct a primary detonator including a transfer charge of Cyanuric Triazide, which produces a further initiation train that may subsequently detonate a secondary explosive, i.e., HDX, RDX, or a pyrotechnic device.Type: GrantFiled: October 19, 2006Date of Patent: July 19, 2011Assignee: The United States of America as represented by the Secretary of the ArmyInventors: Neha Mehta, Gartumg Cheng, Emily A. Cordaro, Neelam Mehta, Carl Hu, Robert Lateer, Daniel Stec, III, Raja G. Duddu, Paritosh R. Dave, Kathy Yang
-
Patent number: 7976654Abstract: High explosives suitable for filling very small volume loading holes in micro-electric initiators for micro-electro-mechanical mechanisms, used as safe and arm devices, are prepared from slurries of crystalline energetic materials including organic liquid and applied using various methods. These methods include swipe loading, pressure loading and syringe loading. The organic liquid serves as a volatile mobile phase in the slurry so as to partially dissolve the energetic material so that, upon evaporation of the mobile phase, the energetic material precipitates and adheres to the loading hole.Type: GrantFiled: July 17, 2009Date of Patent: July 12, 2011Assignee: The United States of America as represented by the Secretary of the ArmyInventors: Daniel Stec, III, Gartung Cheng, Brian E. Fuchs, Gerard Gillen, Neha Mehta
-
Patent number: 7967929Abstract: Secondary crystalline high explosives are disclosed which are suitable for filling very small volume loading holes in micro-electric initiators for micro-electro-mechanical mechanisms (MEMS), used as safe and arm (S&A) devices. The explosives are prepared by adding the such a high explosive to an aqueous first volatile mobile phase, adding such a high explosive to a non-aqueous second volatile mobile phase, mixing the first and second volatile mobile phases and then loading the combined phases into the MEMS device and allowing the aqueous and non-aqueous solvents to evaporate depositing the high explosive. Enhanced adhesion between the deposited high explosive and enhanced rheological properties can be obtained by adding a polymeric binder to both mobile phases.Type: GrantFiled: December 28, 2009Date of Patent: June 28, 2011Assignee: The United States of America as represented by the Secretary of the ArmyInventors: Daniel Stec, III, Amy Wilson, Brian E. Fuchs, Neha Mehta, Paula Cook
-
Patent number: 7964045Abstract: High explosive coatings and inks suitable for use in micro-electronic initiators for micro-electro-mechanical mechanisms used as safe and arm devices, are prepared from coating compositions of crystalline energetic materials and applied using various methods. These methods include wiping and spraying, as well as, pressure applications using a syringe or the like, and application of thick film ink to write specified patterns on a selected surface. A volatile mobile phase may be added to the coating composition to partially dissolve the energetic material so that, upon evaporation of the mobile phase, the energetic material precipitates and adheres to the selected surface.Type: GrantFiled: May 15, 2009Date of Patent: June 21, 2011Assignee: The United States of America as represented by the Secretary of the ArmyInventors: Daniel Stec, III, Gartung Cheng, Brian E. Fuchs, Neha Mehta
-
Publication number: 20100024933Abstract: High explosives suitable for filling very small volume loading holes in micro-electric initiators for micro-electro-mechanical mechanisms, used as safe and arm devices, are prepared from slurries of crystalline energetic materials including organic liquid and applied using various methods. These methods include swipe loading, pressure loading and syringe loading. The organic liquid serves as a volatile mobile phase in the slurry so as to partially dissolve the energetic material so that, upon evaporation of the mobile phase, the energetic material precipitates and adheres to the loading hole.Type: ApplicationFiled: February 15, 2006Publication date: February 4, 2010Inventors: Daniel Stec, III, Gartung Cheng, Brian E. Fuchs, Gerard Gillen, Neha Mehta
-
Patent number: 7407638Abstract: The present invention discloses a process for the on-demand production of small quantities of lead azide. First, a metered quantity of sodium azide solution and a metered quantity of a solution of a lead salt sufficient to react with the sodium azide are introduced into a T-mixer or Y-mixer. Then, the sodium azide and lead salt solutions are conveyed into a static mixer and the azide and lead compounds are permitted to react together, forming insoluble crystals of lead azide as a slurry in an aqueous medium. The lead azide crystals are then separated from the aqueous medium. The process is carried out within an explosion-proof chamber.Type: GrantFiled: February 28, 2005Date of Patent: August 5, 2008Assignee: The United States of America as represented by the Secretary of the ArmyInventors: Andrew Perich, Emily A. Cordaro, Gartung Cheng, Neha Mehta, Daniel Stec, III
-
Patent number: 7052562Abstract: High explosives suitable for filling very small volume loading holes in micro-electric initiators for micro-electro-mechanical mechanisms, used as safe and arm devices, are prepared from slurries of crystalline energetic materials and applied using various methods. These methods include swipe loading, pressure loading and syringe loading. A volatile mobile phase may be added to the slurry so as to partially dissolve the energetic material so that, upon evaporation of the mobile phase, the energetic material precipitates and adheres to the loading hole.Type: GrantFiled: February 28, 2003Date of Patent: May 30, 2006Assignee: The United State of America as represented by the Secretary of the ArmyInventors: Daniel Stec, III, Gartung Cheng, Brian E. Fuchs, Gerard Gillen, Neha Mehta
-
Patent number: 6238501Abstract: The invention is a composition containing high loadings of TNAZ that are made by crash precipitation with water as the precipitation agent. The compositions are in the form of powders, which can be formed and shaped by presseing, extrusion, etc. The TNAZ can be from about 94 to about 99% by weight of the composition.Type: GrantFiled: June 16, 1999Date of Patent: May 29, 2001Assignee: The United States of America as represented by the Secretary of the ArmyInventors: Daniel Stec, III, Rao C. Surapaneni, Brian E. Travers
-
Patent number: 5824806Abstract: TNAZ can be prepared directly from N-tertiarybutyl-3,3-dinitroazetidine compounds. The compounds may be in the form of the tertiary amine or the quaternary amine. The reaction is in the presence of acetic anhydride and nitrate ions. It gives high yields and uses mild conditions.Type: GrantFiled: May 15, 1995Date of Patent: October 20, 1998Assignee: The United States of America as represented by the The Secretary of the ArmyInventors: Daniel Stec, III, Ralph L. Perez, Paritosh R. Dave, Thomas G. Archibald
-
Patent number: 5808099Abstract: ADNAZ, N-acetyl, 3,3 dinitroazetidine, is a new compound and this invention provides the compound, its compositions, preparation and uses. As a compound, it forms a eutectic with TNAZ. It can be used to prepare other compounds. It can be readily nitrated to remove the acetyl group and form TNAZ.Type: GrantFiled: May 15, 1995Date of Patent: September 15, 1998Assignee: The United States of America as represented by the Secretary of the ArmyInventors: Daniel Stec, III, Paritosh R. Dave