Registered patent attorney
Steven J Callistein
Firm
Pioneer Hi-Bred International, Inc.
Address
7250 N.W 62nd Ave.
P O Box 552
Johnston, IA, 50131-0552
US
Phone
Registered as
Registered patent attorney
Other attorneys at Pioneer Hi-Bred International, Inc.
Other patent attorneys in Johnston, Iowa
- Lila Alyce Tohidast AkradITS, Inc.
- Catherine D BrookeUSPTO Reg. 44041
- Daniel J CosgrovePioneer Hi-Bred Int'l Inc.
- Lynda M FitzpatrickDuPont Pioneer
- Jenna T FortiniCorteva Agriscience
- Louise A FoutchUSPTO Reg. 37133
- Krista K. HillCorteva Agriscience LLC
- Amanda J LairdUSPTO Reg. 68242
Frequently asked
Frequently asked about Steven J Callistein
Is Steven J Callistein a registered patent attorney?
Yes. Steven J Callistein is a registered patent attorney with the United States Patent and Trademark Office (USPTO Registration Number 43525). Registration is verified against the USPTO Office of Enrollment and Discipline roster.
Where is Steven J Callistein located?
Steven J Callistein's office is in Johnston, Iowa (50131-0552). Affiliated with Pioneer Hi-Bred International, Inc..
What firm does Steven J Callistein work at?
Steven J Callistein is listed as affiliated with Pioneer Hi-Bred International, Inc. on the USPTO Office of Enrollment and Discipline practitioner roster.
How do I contact Steven J Callistein?
Steven J Callistein's office phone (per the USPTO public roster) is 515-535-2823. 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.