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US3607997A Expired / Lapsed US ⏱️ 0.0 years remaining

Method for producing an x-ray intensifying screen

Assignee: Ilford Imaging UK Ltd
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Filing: 1968-07-25
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Granted: 1971-09-21
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Expires: 1988-07-25
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Abstract

Abstract This application describes a method for the production of a self-supporting plastic-material film assembly which comprises coating onto a casting surface a thin layer of a solution of plastic material or a plurality of superimposed thin layers of solutions of plastic materials, each layer being dried before any subsequent layer is applied, the improvement which comprises coating on the dried top layer of plastic material a relatively thick layer of a plastisol, heating this layer to solidify the plastisol and removing the thus prepared film assembly from the casting surface, each layer of the assembly being selected so as to be strongly adherent in the product to the layer or layers with which it is in contact.

Inventors

  • 👤 Patrick John Linturn

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-31 22:02
CPC Classifications
G; G21; G21K; G21K4/00

Claims Analysis

Total Claims: 2
Claim 1
Independent Claim 18 words
A method according to claim 1 wherein the plastisol is a dispersion of polyvinyl chloride in dibutyl phthalate.
Claim 2
Dependent Claim 30 words
A method according to claim 1 wherein the plastisol is a polyvinyl chloride plastisol and the layers of plastic material contain either a coloring matter, pigment, magnetic oxide or phosphor.

References Cited (Backward Citations)

No citation records indexed.

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1974-09-20 1975-03-22 1975-09-21 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1978-09-20 1979-03-22 1979-09-21 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1982-09-20 1983-03-22 1983-09-21 $7700.00 Window Closed / Lapsed

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