Sherwin Incorporated
Doing business as Sherwin INC
At a glance
EmployeesNot reported
In business sinceNot reported
HeadquartersSouth Gate, CA
US patents3
SAM.gov UEIN4E8CFJKMWM6
CAGE code21405
Incorporated inCA
- penetrants
- penetrant needs
- documentation
- registered users
Named on the company’s own website, read JUL 29, 2026
Supplier designations
For Profit OrganizationSubchapter S Corporation
Self-certified by the company in its SAM.gov registration
Patents
3 US patents granted 2001–2011, none of them in the five years to SEP 2025.
Measurement 3
- Fluorescent and visible penetrant inspectionUS 8,003,009 · granted AUG 23, 2011
- Test piece for inspection penetrant performance assessment and comparisonUS 6,729,175 · granted MAY 4, 2004
- Test piece for inspection penetrant performance assessment and comparisonUS 6,311,538 · granted NOV 6, 2001
Granted to Sherwin, Inc. · PatentsView (USPTO), data through SEP 30, 2025 · CC BY 4.0
Their plant
| Facility | City | State | Employees | Status |
|---|---|---|---|---|
| Sherwin Incorporated | South Gate | CA | — | ACTIVE |
Compiled from federal records — EPA, OSHA, SAM.gov and the U.S. Census — and from the company’s own website. Federal source data is public domain. Each plant’s page names the source of every field.