Spectrogon Spectrogon is a company that manufactures and develops optical filters, thin-film coatings, and holographic diffraction gratings. | ![]() Houston Plating & Coatings Houston Plating & Coatings (HP&C) is a company that provides electroless nickel plating, spray coatings, salt bath nitriding (SBN/QPQ), and other corrosion protection services to petroleum equipment and other manufacturers. | ||||
Founding Date | Founding Date 1984 | Founding Date 1982 | Founding Date 1974 | Founding Date 1988 | Founding Date 1949 |
Type | Type Private | Type Subsidiary | Type Subsidiary | Type Private | Type Private |
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Locations | Locations Täby, SE HQ | Locations Burlington, US HQ Buffalo, US Murrieta, US | Locations Oyster Bay, US HQ | Locations South Houston, US HQ Humble, US | Locations Cincinnati, US HQ Aubange, BE Shanghai, CN Mumbai, IN Tokyo, JP Windhof, LU Singapore, SG |
Employees | Employees 512% increase | Employees 34 | Employees 6329% increase | Employees 562% increase | Employees 3771% decrease |
Operating ⚠ | |||||
Product Categories | Product Categories N/A | Product Categories 6 (Aug, 2020) | Product Categories 4 (Jan, 2023) | Product Categories N/A | Product Categories N/A |

Houston Plating & Coatings (HP&C) is a company that provides electroless nickel plating, spray coatings, salt bath nitriding (SBN/QPQ), and other corrosion protection services to petroleum equipment and other manufacturers.
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