U.S. patents available from 1976 to present.
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Mark Twain (Samuel L. Clemens) received Patent No. 121,992 for "An Improvement in Adjustable and Detachable Straps for Garments." He later received two more patents: one for a self-pasting scrapbook and one for a game to help players remember important historical dates.

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Class 60/274 - Anti-pollution


Subclass of Class 60 - Power plants
Definition: Processes in which the handling or treatment serves to remove
No. of patents: 2263
Last issue date: 01/10/2012


                    57  
NumberTitleIssue Date
4010607Internal combustion engine with afterburner, venturi cooler and exhaust turbine
A power plant in which a turbine is driven by the combustion products of hydrocarbon fuel, air under superatomspheric pressure, and the exhaust gases of an internal combustion engine. Air is supplied by a compressor which is driven by the turbine....
03/08/1977
4007588Idling and part-load control of ignition distributor responsive to pressure upstream or downstream of throttle valve
The pollution content, for example, CO and NOx, of exhaust gas from spark ignition engines is decreased by a reactor and also by retarding ignition spark (a) during engine-idling solely as a function of pressure downstream of throttle valve and...
02/15/1977
4006722Method and device for cleaning gases exhausted from multi-cylinder internal combustion engine
A rich air-fuel mixture is diluted with air and fed into half of the cylinders, the remaining cylinders being fed the undiluted mixture....
02/08/1977
4002025System for heating intake pipe of internal combustion engine
A system for heating the intake pipe of an internal combustion engine including a combustion equipment disposed adjacent to the intake pipe, a fuel supply system for supplying the fuel into the combustion equipment and an air supply system including an ai...
01/11/1977
3988890Overheating protection for an exhaust gas purification block
A method and apparatus for preventing an overheating of an exhaust gas purification block for internal combustion engines in case of a high proportion of combustible gas components in the exhaust gases, in which the exhaust gases are adapted to be conduct...
11/02/1976
3986350Method of and apparatus for improved methanol operation of combustion systems
A method of and apparatus for cracking methanol, for utilizing the cracked-methanol to operate a minimum-pollution fuel-combusting device. The heat of combustion gases which is brought into the presence of a catalyst is employed to crack the methanol into...
10/19/1976
3986351Method and apparatus for controlling the air flow in an internal combustion engine
A method and apparatus for controlling the air flow in an internal-combustion engine that comprises an unthrottled variable-timing third valve engine modification. An unthrottled full charge of air is drawn into the cylinders during the standard intake st...
10/19/1976
3984975Internal combustion engine exhaust emission control
A V-type internal combustion engine has left and right exhaust manifolds interconnected by an exhaust crossover passage and connected by left and right exhaust pipes respectively to a main catalytic converter. The left exhaust pipe has an auxiliary cataly...
10/12/1976
3984976Air-fuel ratio control system for automotive engine with compensation circuit for deterioration of feedback signal generator
In a control system installed on a motor vehicle and constituted of an oxygen concentration sensor and a control device for regulating the fuel supply rate to apparatus for preparing an air-fuel mixture on the basis of a signal from the sensor, a compensa...
10/12/1976
3983754Apparatus for detecting misfires in multi-cylinder type internal combustion engines
A plurality of thermocouples or pressure responsive devices are provided in the exhaust system to detect a misfire in respective cylinders and the outputs of the thermocouples or pressure responsive devices are applied to a comparator for detecting the mi...
10/05/1976
3982393Internal combustion engine exhaust cleaning method and system
Rich and lean air-fuel mixtures can be alternately supplied into engine cylinders in response to engine load to effectively operate an afterburner....
09/28/1976
3978193Method and apparatus for treating exhaust gases
A method and means for catalytically removing impurities found in the exhaust stream emanating from the internal combustion engine is provided. Such exhaust gases are initially brought into contact with a metallic oxidation catalyst at a temperature suffi...
08/31/1976
3964258Reducing undesirable components of automotive exhaust gas
Undesirable pollutants in automotive exhaust gas are reduced using an emission control reactor to oxidize hydrocarbons and CO, and recirculation of some exhaust gas to the engine intake system to reduce NOx content, the warm-up time of the reac...
06/22/1976
3961477Process and system for detoxicating the exhaust gases of an internal combustion engine
For detoxicating the exhaust gases of an internal combustion engine an in-series arrangement of a first reactor and an oxidizing reactor is provided with the exhaust line of the engine along with an oxygen measuring element and structure for producing two...
06/08/1976
3955362Exhaust heat conservation
A method of programming exhaust gas constituents is disclosed which cooperates with a unique exhaust passage liner construction resulting in an improved self-cleaning technique for internal combustion engines. The liner comprises an apparatus which prefer...
05/11/1976
3949551Method and system for reducing noxious components in the exhaust emission of internal combustion engine systems and particularly during the warm-up phase of the engine
The exhaust system of the engine is provided with a reactor, for example a catalytic reactor; the air-fuel mixture normally fed to the engine is set to be on the lean range. During starting, the mixture is enriched for a predetermined time; the degree of ...
04/13/1976
3946558Exhaust system and method
Exhaust system for an internal combustion engine with wall means forming a wave tube having a substantially unimpeded flow passage with one end adapted to be placed in communication with the exhaust opening of the internal combustion engine. The wall mean...
03/30/1976
3945204Process for the detoxification of exhaust gases
A process for reducing the concentration of undesirable components in the exhaust gases of an internal combustion machine. The process provides injecting fuel into the hot exhaust gases within the exhaust system and controlling the quantity of this additi...
03/23/1976
3943709Substoichiometric air addition to first stage of dual catalyst system
Process and apparatus for reducing emissions from internal combustion engine exhaust gas. The exhaust gas treatment system includes a first stage converter containing an NOx reduction catalyst, a second stage converter containing a catalyst for...
03/16/1976
3943407Method and apparatus for producing increased quantities of ions and higher energy ions
A method and apparatus for producing ions wherein an ion generator produces periodic pulses of electric energy of a single polarity for some applications and alternating positive and negative polarities for other applications. A plurality of the electric ...
03/09/1976
                    57  
 
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