U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

Icon_funbox 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.

Newsletter  PatentStorm News

Make the Most of PatentStorm

See this month's Top Inventors and Most Cited Patents.

Stay on top of the latest patents by subscribing to an RSS feed.

Got questions? Ask a Patent Expert!

Registered users: Manage your profile, comments and alerts.

 

US Patent 4085193 - Catalytic process for reducing nitrogen oxides to nitrogen

US Patent Issued on April 18, 1978
Estimated Patent Expiration Date: Icon_subject April 18, 1995Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
loading...


View Patent Images (PDF)
(Registered users only)

Abstract

A catalyst compositions for reducing nitrogen oxide comprising, as its chief ingredient, an intimate mixture ofA. titanium (Ti) as component A, withB. at least one metal selected from the group consisting of molybdenum (Mo), tungsten (W), iron (Fe), vanadium (V), nickel (Ni), cobalt (Co), copper (Cu), chromium (Cr), and uranium (U), as component B,in the form of their oxides, and a process for reducing nitrogen oxides to nitrogen, which comprises contacting a gaseous mixture containing nitrogen oxides and molecular oxygen and a reducing gas with aforesaid catalyst compositions at an elevated temperature.

Inventors

Assignee

Application

No. 531304 filed on 12/10/1974

US Classes:

423/239.1, Utilizing solid sorbent, catalyst, or reactant423/351, NITROGEN OR COMPOUND THEREOF (EXCEPT AMMONIUM SALT OF NON-NITROGEN ACID)502/204, And Group VI metal containing (i.e., Cr, Mo, W or Po)502/206, Molybdenum containing502/241, Of Group VII (i.e., Mn, Tc or Re)502/242, Of Group IV (i.e., Ti, Zr, Hf, Ge, Sn or Pb)502/302, Of lanthanide series (i.e., atomic number 57 to 71 inclusive)502/306, And Group II metal containing (i.e., alkaline earth, Be, Mg, Zn, Cd or Hg)502/307, Zinc502/309, Titanium containing502/315, Nickel containing502/316, Iron containing502/318, Copper containing502/324, Of manganese502/328, And Group II metal containing (i.e., alkaline earth, Be, Mg, Zn, Cd or Hg)502/329, Zinc containing502/330, And Group I metal containing (i.e., alkali, Ag, Au or Cu)502/335, Of nickel502/336Of iron

Field of Search

423/235, Nitrogen or nitrogenous component423/213.2, Utilizing as solid sorbent, catalyst, or reactant a material containing a transition element423/213.5, Group VIII element423/351NITROGEN OR COMPOUND THEREOF (EXCEPT AMMONIUM SALT OF NON-NITROGEN ACID)

Examiners

Primary: Vertiz, O. R.
Assistant: Wheelock, Eugene T.

Attorney, Agent or Firm

US Patent References

3230034, 3257163, 3565574, 3615166, 3844980, 3885020, 3892897, 3900428, 3900429, 3903242, 4003711, Apparatus for elimination of nitrogen oxides from combustion waste gases
Issued on: 01/18/1977
Inventor: Hishinuma ,   et al.
4003978, Method for treating ammonia-containing gases
Issued on: 01/18/1977
Inventor: Shiraishi ,   et al.
4010238Proces for selective removal of nitrogen oxides from waste gases
Issued on: 03/01/1977
Inventor: Shiraishi ,   et al.

International Classes

B01J 008/00
C01B 021/00

Foreign Application Priority Data

1973-12-12 JA

Comments

No comments for this page
 
 
Forgot password?
Register here