Did You Know...
...In 1790, the cost to obtain a patent was between $4 and $5.
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.
| Number | Title | Issue Date |
| 7319122 | Polypropylene resin suitable for fibers and nonwovens A blended polypropylene composition, fiber, and nonwoven articles made therefrom are provided. In one aspect, the blended polypropylene composition comprises a first polymer component having a molecular weight distribution of from 2.5 to 8, and a second polymer comp... | 01/15/2008 |
| 7026040 | Oriented films from improved propylene polymers This invention relates generally to films made from crystalline polypropylene polymers. Specifically, this invention relates to films comprising crystalline polypropylene polymer compositions containing both propylene homopolymers and propylene copolymers. The compo... | 04/11/2006 |
| 6884850 | Graft-modified polymers based on novel propylene ethylene copolymers Propylene ethylene copolymers with an ethylene content between 8 and 32 mole % have been grafted with maleic anhydride and a peroxide. The functionality level is higher than what is reported with polypropylene. ... | 04/26/2005 |
| 6010588 | Polyolefin fibers and their fabrics Novel fibers have been made of reactor grade isotactic poly-alpha-olefin wherein polypropylene is produced by single-site catalysis and has a melt flow rate of greater than zero to about 5,000, MWD in the range of about 1.0 to about 3.5.... | 01/04/2000 |
| 5741563 | Shrink films from propylene polymers Shrink films prepared from metallocene catalyzed propylene homopolymers and copolymers are provided. The films exhibit a unique balance of properties as compared to known shrink films including higher stiffness, tensile strength and moisture barrier, lowe... | 04/21/1998 |
| 5736465 | Polyolefin fibers and their fabrics Novel fibers have been made from reactor grade isotactic poly-alpha-olefin wherein polypropylene is produced by single-site catalysis and has a melt flow rate of greater than zero to about 5,000, MWD in the range of about 1.0 to about 3.5.... | 04/07/1998 |
| 5723560 | Higher molecular weight amorphous polypropylene An amorphous polypropylene having a high weight average molecular weight prepared by a process in the presence of a catalyst comprising titanium-containing monocyclopentadienyl metallocene and aluminoxane.... | 03/03/1998 |
| 5723217 | Polyolefin fibers and their fabrics Novel fibers have been made from reactor grade isotactic poly-alpha-olefin wherein polypropylene is produced by single-site catalysis and has a melt flow rate of greater than zero to about 5,000, MWD in the range of about 1.0 to about 3.5.... | 03/03/1998 |
| 5721184 | Method for making supported catalyst systems and catalyst systems therefrom Catalyst systems and methods for supporting catalysts and their components, particularly metallocene catalyst components, are provided. The method involves techniques for evenly distributing a small volume of catalyst component over and among a porous sup... | 02/24/1998 |
| 5670595 | Diene modified polymers Diene modified polymers are provided as well as methods for preparing the same. The polymers have from 3-8 carbon atoms, from about 0.00005 to about 5 mole percent diene based on the total weight of the polymer. The polymers are essentially gel-free and e... | 09/23/1997 |
| 5635437 | Method for preparing metallocene catalyst systems This invention is generally directed toward a method for producing metallocene catalyst systems. Specifically, the method involves removing solid impurities from a solution of activated metallocene wherein activation has the effect of solubilizing the met... | 06/03/1997 |
| 5625015 | Method for making supported catalyst systems and catalyst systems therefrom Catalyst systems and methods for supporting catalysts and their components, particularly metallocene catalyst components, are provided. The method involves techniques for evenly distributing a small volume of catalyst component over and among a porous sup... | 04/29/1997 |
| 5433924 | Method and apparatus for feeding a catalyst A catalyst feed system is described for intermittent delivery of supported and/or prepolymerized supported catalyst to a polymerization reactor. The system incorporates valves with cylindrical sealing surfaces as well as a venting stage incorporating a fi... | 07/18/1995 |
| 5420217 | Process for producing amorphous poly--olefins with a monocyclopentadienyl transition metal catalyst system The invention is a catalytic process using a Group IV B transition metal component and an alumoxane component to polymerize propylene to produce amorphous polypropylene.... | 05/30/1995 |
