Patent application number | Description | Published |
20100069223 | METHOD FOR THE PREPARATION OF CERAMIC MATERIALS - A novel process for the preparation of boron carbide, boron nitride and silicon carbide powders comprises carbidization or nitrization step of boron oxide or silicon oxide respectively, using nanoparticles substrates. | 03-18-2010 |
20120070357 | METHOD FOR THE PREPARATION OF BORON NITRIDE POWDER - This invention is directed to a process for the preparation of boron nitride powder, particularly a fine powder with a low degree of contamination, which demonstrates good caking, heat conductivity and dielectric properties. Specifically, a process for the preparation of amorphous boron nitride (a-BN) is provided wherein the process comprises: mixing powders of boric acid and a carbamide at a temperature in the range of about 250-300° C., thereby forming: ammonium polyborates; boron imide or a mixture thereof and ammonia; and heating of the materials formed in step (a) to a temperature in the range of about 500-600° C., thereby forming a powder of a-BN. | 03-22-2012 |
20130011317 | METHOD FOR THE PREPARATION OF BORON NITRIDE POWDER - This invention is directed to a process for the preparation of boron nitride powder, particularly a fine powder with a low degree of contamination, which demonstrates good caking, heat conductivity and dielectric properties. Specifically, a process for the preparation of amorphous boron nitride (a-BN) is provided wherein the process comprises: mixing powders of boric acid and a carbamide at a temperature in the range of about 250-300° C., thereby forming: ammonium polyborates; boron imide or a mixture thereof and ammonia; and heating of the materials formed in step (a) to a temperature in the range of about 500-600° C., thereby forming a powder of a-BN. | 01-10-2013 |
Patent application number | Description | Published |
20080222724 | PREVENTION OF DENIAL OF SERVICE (DoS) ATTACKS ON SESSION INITIATION PROTOCOL (SIP)-BASED SYSTEMS USING RETURN ROUTABILITY CHECK FILTERING - A device receives an attack on a Session Initiation Protocol (SIP)-based device, determines a type of the attack, and applies, based on the determined type of the attack, a return routability check filter to the attack. | 09-11-2008 |
20090006841 | SYSTEM AND METHOD FOR TESTING NETWORK FIREWALL FOR DENIAL-OF-SERVICE (DOS) DETECTION AND PREVENTION IN SIGNALING CHANNEL - A device may measure a first performance, associated with legitimate traffic without attack traffic, of a Session Initiation Protocol (SIP)-based protection device implementing authentication; measure a second performance, associated with legitimate traffic and attack traffic, of the SIP-based protection device implementing authentication; and measure a third performance, associated with legitimate traffic and attack traffic, of the SIP-based protection device implementing authentication and return routability filtering. The device may also measure a first performance associated with legitimate traffic of a Session Initiation Protocol (SIP)-based protection device implementing rate-limiting filtering; measure a second performance associated with legitimate traffic and attack traffic of the SIP-based protection device implementing scheme filtering; and measure a third performance associated with legitimate traffic of the SIP-based protection device not implementing rate-limiting filtering without attack traffic. | 01-01-2009 |
20120008624 | SYSTEMS AND METHODS FOR IMPLEMENTING A PROTOCOL-AWARE NETWORK FIREWALL - A method may include receiving a first packet; determining, in a first processor, whether the first packet meets a criterion to be forwarded to a destination indicated in the first packet; receiving a second packet; determining whether the second packet is of a type for changing the criterion and sending the second packet to a second processor if the second packets is of the type for changing the criterion; receiving instructions, based on the second packet sent to the second processor, to change the criterion; and changing the criterion. | 01-12-2012 |
20120137357 | SYSTEM AND METHOD FOR TESTING NETWORK FIREWALL FOR DENIAL-OF-SERVICE (DOS) DETECTION AND PREVENTION IN SIGNALING CHANNEL - A device may measure a first performance, associated with legitimate traffic without attack traffic, of a Session Initiation Protocol (SIP)-based protection device implementing authentication; measure a second performance, associated with legitimate traffic and attack traffic, of the SIP-based protection device implementing authentication; and measure a third performance, associated with legitimate traffic and attack traffic, of the SIP-based protection device implementing authentication and return routability filtering. The device may also measure a first performance associated with legitimate traffic of a Session Initiation Protocol (SIP)-based protection device implementing rate-limiting filtering; measure a second performance associated with legitimate traffic and attack traffic of the SIP-based protection device implementing scheme filtering; and measure a third performance associated with legitimate traffic of the SIP-based protection device not implementing rate-limiting filtering without attack traffic. | 05-31-2012 |