Famous Patents
3M employee and church chorister Art Fry needed something to temporarily mark pages in his hymnal. He was in luck because his colleague, Spencer Silver, accidentally developed a glue that was too weak for other purposes. After initially discouraging consumer response, Post-it Notes became a hit in 1979.
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| Number | Title | Issue Date |
| 7441596 | Swelling element packer and installation method A sealing element that swells on exposure to well fluids present or added to the wellbore is assembled to the mandrel in a manner to induce circumferential stresses proximately to the inside diameter of the element so as to resist the tendency of the inside diameter... | 10/28/2008 |
| 7228915 | Device and method to seal boreholes Apparatus and methods are described that are particularly suited for creating a seal in a borehole annulus. In one embodiment, an outer surface 10s of an expandable conduit 10 is provided with a formation 20 that includes an elastomeric m... | 06/12/2007 |
| 6910692 | Composite elastomeric seal for sealing fluid lines A composite elastomeric seal for sealing fluid line members is provided. The composite seal comprises an outer U-shaped seal body and an inner elastomeric portion. The U-shaped seal body comprises inner and outer extending arms, each arm having a shaped contour and ... | 06/28/2005 |
| 6612585 | Elastomeric strand-shaped sealing profile An elastomeric strand-shaped sealing profile including at least one continuous transverse beam located in a region between the base and rear side surfaces of the profile and having two sidewise projecting cantilever arms, two sealing lips provided on the ... | 09/02/2003 |
| 6224058 | Static sealing arrangement A static sealing arrangement, comprising a strip-shaped seal of elastomeric material pre-installed in a groove formed in a first structural member and having a contact portion which protrudes, when free, and is held tightly pressed against a planar sealin... | 05/01/2001 |
| 5992858 | Device used in sealing tie reinforcement holes The method includes inserting a first stopper into the tie reinforcement hole, inserting a polymeric sealing material into the hole; inserting a second stopper into the hole, and pushing the second stopper into the hole until it compresses the polymeric s... | 11/30/1999 |
| 5971441 | Rust-resistant sleeve for use in a branch hole of a water pipeline A rust-resistant cylindrical metal sleeve for preventing rust and corrosion from developing around the wall of a branch hole when the sleeve is rigidly fitted into a branch hole that is drilled through the wall of a metal conduit such as a water pipeline.... | 10/26/1999 |
| 5390939 | Joint sealing member A joint sealing member such as may be used in civil engineering works for providing a watertight seal between joint members is disclosed. In one embodiment, the sealing member takes the form of a band-like member constituted by a central portion made of a... | 02/21/1995 |
| 5290045 | Seal for joint, and method of installing same seal The invention relates to a seal (1) for a joint comprising a cylindrical inner core layer (2) made of a water-unexpansible flexible material and having an internal opening (2a), and an outer coating layer (3) which is made of a water-expansible rubber. Th... | 03/01/1994 |
| 5193960 | Washer with elastic water-swellable rubber A washer system comprising: an annular washer having a central opening and an annular packing member which is coaxially arranged with the annular washer, at least a portion of the annular packing member being arranged within the central opening of the ann... | 03/16/1993 |
| 5172919 | Appliance for preventing water from leaking through joint A seal, constituted by a water-expansible portion and a water-unexpansible portion, prevents water from leaking in a construction joint. The expansible portion surrounds the unexpansible portion everywhere except on a side of the unexpansible portion whic... | 12/22/1992 |
| 5096206 | Pipe joint sealer A pipe joint sealer for providing a watertight joint in metal pipe, cast concrete pipe, plastic pipe and the like is disclosed. The pipe joint sealer prevents fine dirt and sand from entering the pipe through the joint. The pipe joint sealer is comprised ... | 03/17/1992 |
| 5072952 | Sealing element The present invention refers to a sealing element, particularly for the sealing of joints, having a foam element which is elastically expandable with delay as a result of impregnation and a substantially air-tight cover. In order to obtain improved tightn... | 12/17/1991 |
| 5049237 | Layered silicates and water-resistant articles made therefrom Disclosed are flocced mineral materials which may be utilized to prepare high temperature resistant, water resistant articles. These materials are prepared by utilizing, as a starting material, a gellable layered swelled silicate that has an average charg... | 09/17/1991 |
| 4758003 | Method and apparatus for changing physical and chemical properties of materials A method for sealing a port in a wall through which an element is passed, comprising the steps of combining a water based fire-resistant liquid sealing material and a solid water absorbing means which will swell to prevent shrinkage to form a mixture that... | 07/19/1988 |
| 4728111 | Compressed asbestos sheet gasket which swells in presence of liquids A sheet gasket comprising a swelling sheet, a non-swelling layer laminated on the swelling sheet, and an adhesive layer coated on the surface of the non-swelling layer. This gasket is adapted to be inserted between flanges having different coefficients of... | 03/01/1988 |
| 4708351 | Sealed joint including water-absorptive, water-swelling coating at joint interface site for using leakage to repair leaks A sealing layer that seals the gap between the body or window glass and the weatherstrip attached to the door, window, trunk, roof side, etc. of an automobile, and also to a weatherstrip, automotive body, and glass plate provided with said sealing layer. ... | 11/24/1987 |
| 4558875 | Aqueously-swelling water stopper and a process for stopping water thereby The disclosed water stopper and water stopping process use an aqueously-swelling water-stopping composition consisting of 10 to 40 weight % of rubber whose main ingredient is polyisobutylene, 10 to 20 weight % of silicate, 10 to 60 weight % of bentonite, ... | 12/17/1985 |
| 4449713 | Aqueously-swelling water stopper and a process of stopping water thereby The disclosed water stopper and water stopping process use an aqueously-swelling water-stopping composition consisting of 10 to 40 weight % of rubber whose main ingredient is reclaimed rubber, 10 to 20 weight % of silicic compound, 10 to 60 weight % of be... | 05/22/1984 |
| 4443019 | Aqueously-swelling water stopper and a process of stopping water thereby The disclosed water stopper and water stopping process use an aqueously-swelling water-stopping composition consisting of 10 to 40 weight % of rubber whose main ingredient is reclaimed rubber, 10 to 20 weight % of silicic compound, 10 to 60 weight % of be... | 04/17/1984 |
| 4403779 | Seals for liquid-tight closure between rotary component and partition A seal for producing a liquid-tight closure between a rotary component and a partition separating two chambers, where the rotary component penetrates the partition, said seal includes a retaining means which may be secured to the partition so that it surr... | 09/13/1983 |
| 4095803 | Keyway oil seal assembly The disclosure illustrates an oil seal assembly for a keyway which receives a pin for an interconnection between an accessory drive pulley and a shaft extending from a diesel engine accessory drive gear box. The oil seal consists of an L-shaped elastomeri... | 06/20/1978 |
| 4069019 | Seal structure for tank lid of spray corrosion tester A spray corrosion test apparatus comprising an open topped test tank and a lid to cover the top of said test tank, said test tank having provided around the top edge of the side wall thereof a groove between the inner and outer surfaces of the wall thereo... | 01/17/1978 |
