A method comprising applying a chemical change reagent to coal prior to combustion of the coal is provided. In some instances, the chemical change reagent can include an effective amount of a material to reduce NOx emissions, SOx emissions, or both from combustion of the coal.

Claims

13 · 3 independent · depth 3

13 granted claims

›1.independentA method of assisting complete combustion of coal comprising applying to the coal a chemical change reagent prior to combustion of the coal to provide…+7

›8.independentA method of reducing NOx and SOx emissions in coal comprising:napplying a NOx reducing reagent to a surface of the coal prior to combustion of the coa…+2

›11.independentA method of treating coal to reduce the level of NOx and SOx emissions resulting from combustion of the coal, the method comprising applying a surface…+1

Classifications

11 codes

IPC · International Patent Classification

Section B — Performing operations; transporting

B01F17/00

Section C — Chemistry; metallurgy

C10L1/32
C10L5/32
C10L10/00
C10L10/02
C10L9/10
C10L5/00

USPC · US Patent Classification

44/62044/62744/60344/544

Claim changes

Soon

Coming soonHow the claims changed between publication and grant

See which claims were amended, added or cancelled during examination, with every added and removed word marked.

AmendedAddedCancelledUnchanged

The published claims of this patent are not paired with the granted ones in what we hold.

File wrapper

Pendency

2.9 y

1,065 days filing → grant

Office actions

non-final + final

Responses

2 RCE

Examiner

Pamela H Weiss

art unit 1771 · TC 1700

Law firm

Law firm · Log in to unlock

Citations: 29 back · 0 forward

See the full prosecution history — every USPTO and applicant action on this file, in order.

Term & fees

See the term timeline — pendency span, in-force span, the maintenance fees paid and both computed expiry dates.

Priority chain

2 priority documents

Priority

29 Jul 2003

earliest claimed

›Priority documents — 2

Type	Document	Date
provisional	US 60490995	29 Jul 2003
related publication	US 20120311924 A1	13 Dec 2012

Validity challenges

See the validity challenges on record — reexaminations, IPRs and PGRs, with their institution decisions and outcomes.

Citations

See every patent this one cites and every patent that cites it back — publication, assignee, and how each one was found.