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US 8,574,917 B2Granted
Hydrogen sulfide indicating pigments
AssigneeElement One, Inc.
InventorsWilliam Hoagland, David K. Benson, Rodney D. Smith
Life of this patent
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AssigneeElement One, Inc.
InventorsWilliam Hoagland, David K. Benson, Rodney D. Smith
Estimating the term…
Disclosed is a pigment that changes color upon exposure to hydrogen sulfide gas. The pigment may be ground or otherwise reduced to small particles and used in coatings, dyes, paints or inks. Potential applications for paints and inks include the production of warning indicators for the presence of hydrogen gas in areas where such presence may pose a hazard. Warning decals may be printed with pigmented ink and posted in areas of potential hydrogen hazard. In the presence of hydrogen sulfide gas, the decals can display a warning by causing a change in the color of a printed message. Objects may also be coated with pigmented paints so that if a hydrogen sulfide leak occurs from within or nearby the object, the color of the object changes to provide a warning of the presence of leaked hydrogen sulfide. Example applications of such painted objects include any industrial process containing hydrogen sulfide.
A hydrogen sulfide gas detector comprising:
A pigment for detecting hydrogen sulfide gas comprising:
A method of making a hydrogen sulfide detector material that detects hydrogen sulfide gas comprising:
A hydrogen sulfide gas detector comprising:
Dependencies are inferred from the claim text.