Registered patent attorney
Philip J Crihfield
Firm
Sidley Austin Brown and Wood
Address
One S. Dearborn
Bank One Plaza
Chicago, IL, 60603
US
Phone
Registered as
Registered patent attorney
Other attorneys at Sidley Austin Brown and Wood
Other patent attorneys in Chicago, Illinois
- Lawrence H AaronsonMcDonnell Boehnen Hulbert & Berghoff LLP
- Dennis J AbdelnourHonigman LLP
- Holby Matthew AbernNeal, Gerber & Eisenberg LLP
- Cassandra L. AbernathyUSPTO Reg. 75330
- John AbramicSteptoe & Johnson LLP
- David Brian AbramowitzLocke Lord LLP
- Hugh A AbramsShook, Hardy & Bacon LLP
- Matthias AbrellMarshall Gerstein & Borun, LLP
Frequently asked
Frequently asked about Philip J Crihfield
Is Philip J Crihfield a registered patent attorney?
Yes. Philip J Crihfield is a registered patent attorney with the United States Patent and Trademark Office (USPTO Registration Number 25621). Registration is verified against the USPTO Office of Enrollment and Discipline roster.
Where is Philip J Crihfield located?
Philip J Crihfield's office is in Chicago, Illinois (60603). Affiliated with Sidley Austin Brown and Wood.
What firm does Philip J Crihfield work at?
Philip J Crihfield is listed as affiliated with Sidley Austin Brown and Wood on the USPTO Office of Enrollment and Discipline practitioner roster.
How do I contact Philip J Crihfield?
Philip J Crihfield's office phone (per the USPTO public roster) is 312-853-7650. Verify availability and intake details directly with the firm before sending privileged materials.
Should I prepare anything before contacting a patent attorney?
Yes — most patent attorneys quote based on a brief. Persoona's intellectual property module generates a prior-art analysis, defensibility scorecard, and a draft USPTO filing package so you arrive with a brief, not a blank slate. Free to run.
Profile sourced from the USPTO OEDCI Practitioner Roster. Persoona did not provide, edit, or curate this data — every field is pulled directly from the public roster.