Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
164 words
In a patch test for administration of a standardized, precise dose, of reactive material to skin to determine sensitivity to said reactive material; the improvement comprising, in combination: a first metal foil layer laminated on the inner side thereof with a layer of synthetic impermeable material, an absorbent disc means, containing a dose of a test substance, positioned on said layer of synthetic material spaced inwardly of the edges of said first metal foil layer, a second metal foil layer overlying the absorbent disc means and being heat sealed to the layer of synthetic material on said first metal foil layer by a continuous peripheral heat seal located substantially immediately adjacent the peripheral edge of the absorbent disc means, to provide a sealed pouch means for protecting the dose of test substance in the absorbent disc means from light and also against leakage of the dosage of the test substance in the absorbent disc means beyond said heat seal adjacent the absorbent disc means.
Claim 2
Dependent Claim
164 words
In a patch test for administration of a standardized, precise dose, of reactive material to skin to determine sensitivity to said reactive material; the improvement comprising, in combination: a first metal foil layer laminated on the inner side thereof with a layer of synthetic impermeable material, an absorbent disc means, containing a dose of a test substance, positioned on said layer of synthetic material spaced inwardly of the edges of said first metal foil layer, a second metal foil layer overlying the absorbent disc means and being heat sealed to the layer of synthetic material on said first metal foil layer by a continuous peripheral heat seal located substantially immediately adjacent the peripheral edge of the absorbent disc means, to provide a sealed pouch means for protecting the dose of test substance in the absorbent disc means from light and also against leakage of the dosage of the test substance in the absorbent disc means beyond said heat seal adjacent the absorbent disc means.
Claim 3
Dependent Claim
15 words
A patch according to claim 1, wherein the test substance is mixed with an excipient.
Claim 4
Dependent Claim
66 words
A patch according to claim 2, wherein the excipient comprises at least one compound selected from the group consisting of: the glycerides of fatty acids in C 12 -C 18 , the polyoxyethylenated glycerides of fatty acids, the alkyl esters of fatty acids, the fatty acids, the fatty alcohols in C 12 -C 18 , the ethers of said fatty alcohols and the esters of glycols.
Claim 5
Dependent Claim
23 words
A patch according to claim 2, wherein the excipient is a semi-synthetic glyceride having a melting point ranging between 33° and 45° C.
Claim 6
Dependent Claim
28 words
A patch according to claim 2, wherein the excipient comprises at least one compound selected from the group consisting of propylene glycol, glycerine, the polyoxethylenated glycols and alcohols.
Claim 7
Dependent Claim
13 words
A patch according to claim 1, wherein the test substance is an allergen.
Claim 8
Dependent Claim
21 words
A patch according to claim 6, wherein the allergen is a compound selected from the group consisting of dinitrochlorobenzene or dinitrofluorobenzene.
Claim 9
Dependent Claim
23 words
A patch according to claim 6, wherein the quantity of allergen is at least equal to 60 gammas and constitutes a sensitizing patch.
Claim 10
Dependent Claim
16 words
A patch according to claim 8, wherein the quantity of allergen is less than 150 gammas.
Claim 11
Dependent Claim
20 words
A patch according to claim 6, wherein the quantity of allergen ranges between 1-10 gammas and constitutes a revelation patch.
Claim 12
Dependent Claim
35 words
A patch test according to claim 1, wherein the synthetic impermeable material is selected from one group consisting of polyethylene, a polyvinyl resin, a polyalkylvinyl resin, polyvinylidene chloride, a polyvinylic copolymer and a polyacrylic copolymer.
Claim 13
Dependent Claim
27 words
A patch according to claim 1, wherein the absorbent disc means is formed from a material selected from the group consisting of filter paper and blotting paper.
Claim 14
Dependent Claim
19 words
A patch according to claim 1, wherein the area of the absorbent material ranges between 2-7 cm 2 .
Claim 15
Dependent Claim
15 words
A patch according to claim 1, wherein the second foil layer presents a small tab.
Claim 16
Dependent Claim
65 words
A patch test as in claim 1 wherein the patch test is packaged for adhesive application by securing the first metal foil layer centrally to an adhesive strip, leaving portions of the adhesive strip adjacent the first metal foil layer exposed, and a protective corrugated covering is applied to the exposed portions of the adhesive strip and covers and encloses the second metal foil layer.
Claim 17
Dependent Claim
25 words
A patch test as in claim 1 wherein the metal of both metal foil layers is from the group consisting of aluminum, tin and lead.
Claim 18
Dependent Claim
23 words
A patch test as in claim 16 wherein the metal of both metal foil layers is aluminum sheet of about 25 microns thickness.