Mcnish Corporation
Doing business as Amwell
At a glance
Employees100-499
In business sinceNot reported
HeadquartersAurora, IL
US patents8
SAM.gov UEILHGRTN1DK841
CAGE code92368
Incorporated inOH
- wastewater treatment equipment
- USA-based facility
- clarifier equipment
- gear drive assemblies
- legacy treatment equipment
Named on the company’s own website, read JUL 29, 2026
Supplier designations
For Profit OrganizationManufacturer of GoodsSubchapter S Corporation
Self-certified by the company in its SAM.gov registration
Patents
8 US patents granted 1993–2015, none of them in the five years to SEP 2025.
Chemical engineering 5Mechanical elements 3
- Adjustable seal apparatus for mounting a mixing apparatus to a vesselUS 9,080,673 · granted JUL 14, 2015
- Adjustable seal apparatus for mounting a mixing apparatus to a vesselUS 8,899,594 · granted DEC 2, 2014
- Energy dissipating inlet for clarifiersUS 7,549,441 · granted JUN 23, 2009
- Condensate removal systemUS 6,926,022 · granted AUG 9, 2005
- Seal device having a flexible finger seal memberUS 6,254,102 · granted JUL 3, 2001
Newest 5 shown · Granted to McNish Corporation · PatentsView (USPTO), data through SEP 30, 2025 · CC BY 4.0
Their plant
| Facility | City | State | Employees | Status |
|---|---|---|---|---|
| Mcnish Corporation | Aurora | IL | 100–499 | 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.