Did You Know...
...that one person who claimed to be the inventor of the television is Russian emigre Vladimir Zworykin? In 1929 David Sarnoff, founder of RCA, asked Zworykin what it would take to develop TV for commercial use. He said: a year and a half and $100,000. In reality, it took 20 years and $50 million! Before his death in 1982 at the age of 92, Zworykin said of his invention: "The technique is wonderful. It is beyond my expectations. But the programs! I would never let my children even come close to this thing."
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| Number | Title | Issue Date |
| 4867875 | Combined water purifying beverage maker A water purifier continuously circulates water under treatment between heating and purification apparatus. The purified water is selectively dispensed either directly into a vessel for food preparation or other uses requiring purified water, or into a bev... | 09/19/1989 |
| 4866890 | Cover member for rain gutters A cover member for mounting on a conventional rain gutter on a building structure, consisting of a one piece thin, longitudinal shield to be inserted under the shingles of the roof and having a serrated outer edge which is bent downward a short distance b... | 09/19/1989 |
| 4863601 | Filter apparatus with hydrophilic filter material and hydrophobic support A filter bag is positioned inside and fastened to a holding frame. The holding frame has substantially vertical walls and is adapted to be placed on the edge of a coffee cup or the like. The sides of the holding frame that face the filter bag are made of ... | 09/05/1989 |
| 4863593 | Battery powered vacuum unit Battery powered vacuum unit, useful for suction filtration of water samples in the field. The vacuum unit comprises a miniature piston type air suction pump, driven by a small direct current (DC) motor which in turn is powered by a battery or other 12 vol... | 09/05/1989 |
| 4859348 | Method and device for filtering oils from infusion beverages A filter device adapted to separate immiscible liquids in beverages such as coffee or tea and other consumable material such as soups and gravies is so designed whereby the beverage or other consumable material passes through a special prewetted filter cl... | 08/22/1989 |
| 4859337 | Filter for making portions of coffee or tea The invention relates to A filter for making portions of coffee or tea, comprising a substantially cup-shaped supporting vessel having a pouring-in opening at the top, a chamber for filling with liquid and having an outlet opening at the bottom, and a fil... | 08/22/1989 |
| 4853126 | Paint strainer A paint strainer of conical configuration provided with peripherally-spaced discharge openings in the side wall above the tip, a secondary opening located between the peripherally-spaced openings, and a discharge opening at the tip located in the side wal... | 08/01/1989 |
| 4849061 | Method of making plastic filter units having a welded cellulose filter A plastic filterware having a filter membrane made at least in part of cellulose nitrate welded to the filterware and a method of making same.... | 07/18/1989 |
| 4841686 | Rain gutter assembly This relates to an improvement for rain gutters comprising a filter attachment which is constructed to fit over the open end of the gutter. The filter attachment comprises an elongated screen to the underside of which is clamped a pad of fibrous material ... | 06/27/1989 |
| 4832845 | Permanent coffee filter The present invention relates to a reusable or permanent filter assembly useful in positioning and retaining the ground roast of coffee or tea in a hot water beverage maker. The plastic filter assembly consists of a separable outer container and an inner/... | 05/23/1989 |
| 4804470 | Paint strainer An improved paint strainer for use in straining a liquid paint and depositing the same within a reservoir container has an upwardly extending continuous closed wall surface having means for attachment to the paint reservoir on its lower end and a strainer... | 02/14/1989 |
| 4769957 | Needle and leaf drain gutter guard A structure to prevent all manner of debris from entering into and clogging the drain guttering system of a sloping roof dwelling or building; through the use of a fine mesh screening top immediately underlying which is located a gently sloping needle sto... | 09/13/1988 |
| 4765896 | Brewing funnel with removable insert Beverage brewing funnel combination for supporting scrunchable disposable filters in either their non-scrunched full or normal capacity condition or in a scrunched reduced-capacity condition. The combination is formed by a funnel and a removable skeleton-... | 08/23/1988 |
| 4750300 | Gutter screen guard A screen guard for covering eaves troughs on buildings. A screen which is framed with smooth rounded edging is laid atop the roof above the gutter edge and held tightly in place with a clip specifically shaped to grip the outermost gutter lip, support the... | 06/14/1988 |
| 4740303 | Metal filter foil A metal filter foil has elongated slits forming the filter openings. The slits are arranged in a plurality of groups. In each group the slits are parallel to one another, and the slits of different groups form an angle with one another.... | 04/26/1988 |
| 4739697 | Brew chamber with filter spacer An improved brew chamber with filter spacer and support frame for use in an electric coffeemaker. The support frame being resiliently engagable within said brew chamber to be spaced from the chamber bottom whereby filter paper may be received within said ... | 04/26/1988 |
| 4735719 | Coffee filter ring A continuous generally frusto-conically shaped ring for use in retaining the side walls of conventional automatic drip type coffee filters in erect orientation within filter support trays and which include an annular flange which is engageable with the to... | 04/05/1988 |
| 4716824 | Food marinator The present invention employs an arrangement of multiple containers for marinating food. The container arrangement includes an inner container having a bottom wall and side walls which define a food holding chamber. A plurality of apertures are provided i... | 01/05/1988 |
| 4715271 | Disposable beverage brewer Disclosed is a disposable hot beverage brewer comprised of three sections which bend along fold lines. One section further comprises a vertical fold line through its center. A filter is provided in registry with the inner faces of the three sections. Befo... | 12/29/1987 |
| 4702834 | Plastic filter units having a weld cellulose filter A plastic filterware having a filter membrane consisting essentially of cellulose nitrate welded to a surface of a membrane support member. The weld can be substantially in the shape of a ring having a width of about 2.29 millimeters. The filterware can includ... | 10/27/1987 |
| 4693834 | Transverse flow diagnostic kit The present invention relates to an improved diagnostic device for analyte assay which has a cylindrical body portion and a removably attached cap. The cap has a liquid inlet extending into the cylindrical body portion and has a conical shaped portion lea... | 09/15/1987 |
| 4689147 | Plastic filter assembly A plastic filter assembly having an upper receiving container and a lower receiving container. Either the top or bottom container is provided with at least two recesses for receiving a locking pin in the container not having recesses. The recess has a fir... | 08/25/1987 |
| 4684471 | Process for water purification, and a filter for carrying out the process A process for water purification, intended for the purification of impure water to drinking water condition, composed of mixing 20-50 mg/l of a coagulant and 2-5 mg/l of an activated charcoal with a quantity of impure water, passing the water through a fi... | 08/04/1987 |
| 4680117 | Yogurt separator device A yogurt separator device having in one form a flat blank of filter mesh made of synthetic resin and having openings of from 200 microns to 400 microns in size. The blank being formable into a yogurt-receiving container for separating the whey from the yo... | 07/14/1987 |
| 4675110 | Filter device and apparatus with multiple gas return passages A filter device and apparatus for filtering liquid from a collection vessel into a receptacle vessel, including a conduit, a filter in the conduit, and a rim spaced from the filter and forming an interference fit with the interior surface of the collectio... | 06/23/1987 |
| 4673501 | Bottle top filter A disposable vacuum assisted filter funnel for filtering fluids into bottles. The bottle top filter forms a vacuum dependent seal with the mouth of the bottle. When fluid is introduced into the bottle top filter, the evacuated bottle draws the fluid throu... | 06/16/1987 |
| 4656932 | Coffee filter ring A device for securing a coffee filter in a coffee maker basket comprises a contractable annular member expandable for urging the coffee filter against the inner side of the basket to prevent coffee grounds from slipping between the filter and the side of ... | 04/14/1987 |
| 4650583 | Infusion filter This invention relates to an infusion filter, in particular for use in coffee percolators, which includes a first rigid disc having an open space therein and a second rigid disc having an open space therein. The infusion filter includes a filter element h... | 03/17/1987 |
| 4623461 | Transverse flow diagnostic device This invention relates to a device for testing a specimen comprising a liquid input means having a receiving inlet and a discharge aperture, filter means positioned below the input means having at least one reaction zone for receiving liquid from the inpu... | 11/18/1986 |
| 4622146 | Flexible paint strainer A disposable paint strainer formed of a sleeve of flexible polyethylene narrowing toward an end and a nylon mesh straining element mounted across the interior of the sleeve at the narrower end in spaced relation above such end so as to provide a skirt cap... | 11/11/1986 |
| 4619830 | Beverage filter unit and support A filter unit for making coffee, tea or other beverages consists of a filter pouch and a rod for suspending the pouch in a cup or similar container. The pouch has a water permeable bag portion in which ground coffee, tea or other beverage flavoring can be... | 10/28/1986 |
| 4613439 | Strainer A strainer mountable upon a 55 gallon drum or the like, for thawing frozen edibles comprising a vessel having side walls, preferably a pair of sloping bases extending out from a central opening, which opening is covered by a removable perforated lid. The ... | 09/23/1986 |
| 4607465 | Leaf excluder for rain water guttering A leaf excluder for a rain water guttering of channel form having one outer upper free edge terminating in a curled bead. The leaf excluder comprises a strip of flexible resilient sheet-like material with a plurality of bead engaging fingers along and pro... | 08/26/1986 |
| 4592174 | Gutter protector A gutter protector for use on rain gutters used on buildings to catch and divert water from the roof provides an adjustable snap-in cover adapted to fit over and enclose the gutter without restricting water flow from the roof to the gutter.... | 06/03/1986 |
| 4584101 | Coffee package A coffee package has a filter assembly double folded and enveloped air-tight in a wrapper in a vacuous or inert gas atmosphere. The filter assembly includes a generally rectangular support plate made up of an intermediate portion with an opening for pouri... | 04/22/1986 |
| 4560475 | Filter assembly with supporting edges A filter assembly for providing a filtrate such as coffee has a sack of filter paper adhered to the back of a foldable support plate. The support plate is constituted by an intermediate portion with an opening for pouring hot water therethrough, which is ... | 12/24/1985 |
| 4528095 | Filtering system for potable water A filtering system for potable water has a stand and a basket-shaped filter for filtering potable water. The stand has an upper cantilevered branch with an opening sized to hold said filter. This filter is detachably mounted in the opening.... | 07/09/1985 |
| 4527467 | Filter device for making tea A device for use in brewing tea comprises a bowl having an outlet aperture formed in its bottom for discharge of brewed tea; an outlet tube communicating with the outlet aperture and extending upwardly from the bottom of the bowl; and a sleeve surrounding... | 07/09/1985 |
| 4525270 | Mineral separating process and apparatus Heavy minerals such as gold, silver, platinum, etc., along with gemstones such as diamonds, rubys, sapphires, etc., occuring in nature in the free state or having been mechanically released by crushing, screening and/or sorting into a free state, can be s... | 06/25/1985 |
| 4485015 | Filtration unit An integral spacer formed as part of a filtration column frictionally engages a sample container and permits air to escape from the container as it is filled. One embodiment of the filtration column has a series of spaced-apart projecting wedges around it... | 11/27/1984 |
