Did You Know...
...that Kleenex tissue was originally designed to be a gas mask filter? It was developed at the beginning of World War I to replace cotton, which was then in short supply as a surgical dressing.
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| Number | Title | Issue Date |
| 4094548 | Apparatus for conveying and separating loose material Conveying apparatus for sand, gravel and the like comprises a conveying head at the lower end of a lower pipe portion sealed to and displaceable telescopically relative to an upper pipe portion which is not longitudinally displaceable. An annular interspa... | 06/13/1978 |
| 4095041 | Multiple part insulator for flexible gas-insulated transmission line cable An insulator disk for supporting a flexible conductor within a flexible gas-filled outer housing consists of three identical segments which latch together to form a complete disk around the central flexible conductor of the flexible cable. The outer perip... | 06/13/1978 |
| 4076428 | Pen points for writing instruments Pen point for writing instruments which is a rod-shaped wick composed of synthetic resin filaments and in which narrow slots defined by said filaments extend longitudinally in said wick and form ink passageways, comprising in the cross-section (a) a circu... | 02/28/1978 |
| 4064793 | Expandable double walled smoke stack A double walled smoke stack is made up of stackable sections. The top part of each section has a member extending between inner and outer shells and is either downwardly prestressed towards the inner shell or is flexible. This allows the inner shell to up... | 12/27/1977 |
| 4062376 | Service connection between a main and a meter in a building and method of and equipment for installing the same A service connection between a water main and a meter within a building has a service conduit within a leakage conduit. The leakage conduit has a sealed connection with a casing sealed to the main and enclosing a corporation stop to which the service cond... | 12/13/1977 |
| 4052862 | Method of submerging pipelines The invention consists of a method and apparatus for laying a pipeline, such as an oil duct or a gas duct, in a body of water, wherein the pipeline, or a section thereof, is enclosed within a ballast tube such that an intermediate space is formed between ... | 10/11/1977 |
| 4033381 | Hot air duct A hot air duct is formed from thin walled metal tubing. The duct is provided with a plurality of linearly spaced reinforcing rings. Each reinforcing ring is formed from sheet metal and is channel-shaped in cross-section. The rings are rigidly secured to t... | 07/05/1977 |
| 4014369 | Triple pipe low temperature pipeline A pipeline system for low temperature liquid or hot gas/vapor transfer including a triple pipe arrangement wherein the low temperature liquid or hot gas/vapor is transferred through an inner pipe with a vapor or condensate return respectively being provid... | 03/29/1977 |
| 4009739 | Gasoline and vapor return hose system for delivery truck A coaxial hose for the unloading of gasoline from a tank truck, the inner core carrying gasoline to the storage tank and the concentric outer passage carrying vapors which are returned to the truck as they are displaced from the storage tank.... | 03/01/1977 |
| 3985269 | Automatic liquid dispensing apparatus This invention relates to apparatus for automatically dispensing a two component liquid system such as a beverage; particularly, for delivering two liquid components to a mixing station by means of concentric tubular sections at or near the discharge end ... | 10/12/1976 |
| 3984059 | Liquid handling In the context of the handling of cryogenic materials, particularly liquefied natural gas (LNG), in marine loading systems, coaxial ducting links various plant sites of the system to provide in the one link both liquid transfer ducting and a return ductin... | 10/05/1976 |
| 3981357 | Marine riser An improved marine riser is described which is comprised of a plurality of conduit sections joined together end to end. Buoyancy cans for retaining a compressed gas are flexibly connected to the riser at selected locations along its length and form a flui... | 09/21/1976 |
| 3977439 | Sealing arrangement A device intended for limiting leaks at the feet of the combustible eleme of nuclear reactors constituted by a labyrinth seal placed in the space between the foot of the combustible element and its recess in a supporting plate, one point of the said spac... | 08/31/1976 |
| 3976129 | Spiral concentric-tube heat exchanger A composite tube composed of an inner tube extending through and spaced from an outer tube by radial partition walls is coiled helically. The helical composite tube coil is housed in a tank having an interior silvered reflective surface and evacuated to m... | 08/24/1976 |
| 3974862 | Flexible conduit An outer tube is corrugated helically or annularly and an inner, uncorrugated tube has axially and radially outwardly extending ribs engaging inwardly directed corrugation crests of the outer tube. Part of a fluid flow is diverted into the space between t... | 08/17/1976 |
| 3964754 | Device for sealing the end of sheath pipe Device for sealing the end of a sheath pipe that protects a main pipe therein, comprising a pair of sealing rings arranged in face-to-face relation, a pair of flanges oppositely placed at the outside of said sealing rings, all these sealing rings and flan... | 06/22/1976 |
| 3938233 | Heat transfer apparatus An improved header construction for a heat transfer apparatus of the type utilizing a plurality of concentric, longitudinally extending tubes including an inner tube, an intermediate tube and an outer tube with the intermediate tube extending beyond the o... | 02/17/1976 |
| 3937280 | Artificial lift well apparatus Artificial lift apparatus for use in a well having an outer pipe string for flow of a first fluid and an inner pipe string for flow of a second fluid. The apparatus may comprise a tubular receiver for connection in the inner pipe string and having ports f... | 02/10/1976 |
| 3934618 | Jacketed pipe assembly formed of corrugated metal tubes A jacketed pipe assembly of inner and outer tubular members including respective inner and outer corrugated metal tubes arranged in spaced relationship to define therebetween a fluid-circulating chamber adapted for the circulation therethrough of a temper... | 01/27/1976 |
| 3934617 | Corrugated jacketed pipe assembly having vented enclosures for connecting welds A jacketed pipe assembly of inner and outer tubular members having respective inner and outer corrugated metal tubes arranged in spaced relationship to define therebetween a fluid-circulating chamber adapted for the circulation therethrough of a temperatu... | 01/27/1976 |
| 3934616 | Telescopic structure A telescopic structure comprises an inner and an outer member telescopic relative to each other, and means for supporting and/or guiding one member relative to the other member, comprising a pair of wheels mounted on each member and positioned between the... | 01/27/1976 |
| 3933182 | System for sealing and heat-insulating a duct containing a hot fluid under pressure A duct for the circulation of a hot fluid under pressure and formed in a cold structure of concrete is lined with rigid heat-insulating material such as pumice concrete. A corrugated lining membrane is applied in close contact with the heat-insulating mat... | 01/20/1976 |
