Did You Know...
...that the inventor of the electric motor was a blacksmith named Thomas Davenport? Described as "a brilliantly unsuccessful inventor", Davenport invented the first rotary electric motor. In 1836 he headed out -- on foot -- from his Vermont home to file a patent application at the Patent Office in Washington, D.C. By the time he got there, he had squandered away his money and couldn't afford the $30 filing fee so he turned around and went home. When he later mailed in his application with money he'd raised, the Patent office was destroyed in a fire. He did finally get credit for his invention on Feb. 5, 1837.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Application No. | Application Title | Issue Date |
| 20110042022 | Process of chlorine dioxide bleaching of chemical pulps using magnesium hydroxide or magnesium oxide The present invention provides an improved process for chlorine dioxide bleaching of chemical pulps in an aqueous suspension, which uses magnesium hydroxide or magnesium oxide. The process involves the addition of magnesium hydroxide or magnesium oxide to the pulp, in a... | 02/24/2011 |
| 20100051216 | PROCESS FOR THE CONTROL OF PITCH The present invention relates to a process for the control of pitch in an aqueous medium by adding surface-reacted natural calcium carbonate or an aqueous suspension comprising surface-reacted calcium carbonate and having a pH greater than 6.0 measured at 20° C., to th... | 03/04/2010 |
| 20090101296 | Near Neutral Chlorine Dioxide Bleaching of Pulp Final chlorine dioxide bleaching of lignocellulosic materials is most effective at a near-neutral pH but present industrial practice typically targets a final pH of between 3.5 and 4.0 because of the difficulty in achieving and maintaining near-neutral pH cost effective... | 04/23/2009 |
| 20060070711 | Low pH treatment of pulp in a bleach sequence to produce pulp having low D.P. and low copper number for use in lyocell manufacture A high pH and a low pH process for reducing the degree of polymerization of a pulp having a hemicellulose content of at least 7%. The high pH is greater than 8, and the low pH process is 2 to 8. The high pH process reduces the degree of polymerization without substantia... | 04/06/2006 |
| 20050279467 | Process for high temperature peroxide bleaching of pulp with cool discharge A process for high temperature peroxide bleaching of pulp in which pulp is retained at high temperature and pressure to increase bleaching activity but in which the pulp is cooled prior to discharge from the pressure vessel below the flash point thereby resulting in low... | 12/22/2005 |
| 20050133173 | Process for bleaching Kraft pulp An improved process for bleaching Kraft pulp is disclosed. The improved process involves the use of hydrogen peroxide to treat brownstock before treatment with chlorine or chlorine containing compounds. The process may also be used to treat recycle pulp. ... | 06/23/2005 |
| 20050051288 | Extended retention and medium consistency pulp treatment Treatment of digested or O2 delignified cellulosic pulp in a chlorine dioxide (Do) delignification stage, preceding bleaching of the pulp, at a medium pulp consistency for an extended period of time. Unexpected benefits include improvement in the delignificat... | 03/10/2005 |
| 20050028952 | Apparatus for making carboxylated pulp fibers An apparatus for carboxylating wood pulp which utilizes the wood pulp bleach plant and the method of carboxylating the pulp which takes place in the bleach plant. ... | 02/10/2005 |
| 20050028953 | Methods for making carboxylated pulp fibers An apparatus for carboxylating wood pulp which utilizes the wood pulp bleach plant and the method of carboxylating the pulp which takes place in the bleach plant. ... | 02/10/2005 |
