Back to results
US 4,233,336 AGranted
Method of applying luminescent material to a glass support
AssigneeU.S. Philips Corporation
InventorsJosephus A. Verdult, Lambertus W. J. Manders
Life of this patent
Estimating the term…
Abstract
To apply of a coat of granular luminescent material which comprises an yttrium compound an aqueous suspension is used which contains an alginate as a binder.
Claims4
A method for applying a coating of luminescent material to a glass surface which comprises the steps of:
- providing a luminescent material which consists of granular particles, each individual particle being homogeneous throughout the extent thereof, some of said granular particles being yttrium oxide activated by trivalent europium;
- providing a solution which consists of water and an alginate and which contains at least 0.5% of alginate relative to the weight of said luminescent material;
- mixing said solution and said luminescent material to obtain a stable suspension, coating the glass surface with said suspension and then heating said suspension sufficiently to burn off said alginate.
Dependencies are inferred from the claim text.