Registered patent attorney
Sydney R Kokjohn
Firm
McDonnell Boehnen Hulbert & Berghoff, LLP
Address
300 South Wacker Drive, Suite 3100
Chicago, IL, 60606-6709
US
Phone
Registered as
Registered patent attorney
Other attorneys at McDonnell Boehnen Hulbert & Berghoff, LLP
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 Sydney R Kokjohn
Is Sydney R Kokjohn a registered patent attorney?
Yes. Sydney R Kokjohn is a registered patent attorney with the United States Patent and Trademark Office (USPTO Registration Number 63868). Registration is verified against the USPTO Office of Enrollment and Discipline roster.
Where is Sydney R Kokjohn located?
Sydney R Kokjohn's office is in Chicago, Illinois (60606-6709). Affiliated with McDonnell Boehnen Hulbert & Berghoff, LLP.
What firm does Sydney R Kokjohn work at?
Sydney R Kokjohn is listed as affiliated with McDonnell Boehnen Hulbert & Berghoff, LLP on the USPTO Office of Enrollment and Discipline practitioner roster.
How do I contact Sydney R Kokjohn?
Sydney R Kokjohn's office phone (per the USPTO public roster) is 312-913-3304. 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.