USPatentGranted
B2

Free radical generator and method

Granted 14 Dec 2004 · 6 office actions

Current assignee: SIEMENS WATER TECHNOLOGIES CORP. · originally USFilter Corporation

Law firm: Law firm · Log in to unlock

Attorney: Attorney · Log in to unlock

Inventors: Roy Martin · Examiner: Frank M. Lawrence

Life of the patent

3 dated events
⤢ drag to zoomJan 2002Jul 2002Jan 2003Jul 2003Jan 2004Jul 2004Jan 2005Prosecution
Prosecutionhover for detail · click to open

Abstract

An apparatus for generating free radical species can be used to sanitize water systems. The apparatus generates hydroxyl free radical species using substantially pure water, or using a liquid that is substantially free of oxygen-reactive species, to maximize free radical species generation to sanitize the water system. The free radical species are generated by ultraviolet radiation having a wavelength of less than or equal to 254 nm.

Classifications

4 codes
IPC · International Patent Classification
Section C — Chemistry; metallurgy
  • C02F1/32
USPC · US Patent Classification
210/748210/763210/759

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
2.8 y
1,022 days filing → grant
Office actions
3
non-final + final
Responses
3
1 RCE
Examiner
Frank M. Lawrence
art unit —
Citations: 229 back · 0 forward

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

Log in to unlock

Term & fees

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

Log in to unlock

Priority chain

1 priority documents
›Priority documents — 1
TypeDocumentDate
related publicationUS 20030160004 A128 Aug 2003

Validity challenges

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

Log in to unlock

Citations

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

Log in to unlock