Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
78 words
In a web material adapted for use as a wrapper for smoking articles, said material comprising a cellulosic base web having a substantially water insoluble and thermally stable filler having a superficial surface area in the range of at least about twenty M 2 /g providing a superficial surface area in the web of at least eighty square meters per square meter of web and containing up to about 15 percent by weight of an alkali metal salt.
Claim 2
Dependent Claim
78 words
In a web material adapted for use as a wrapper for smoking articles, said material comprising a cellulosic base web having a substantially water insoluble and thermally stable filler having a superficial surface area in the range of at least about twenty M 2 /g providing a superficial surface area in the web of at least eighty square meters per square meter of web and containing up to about 15 percent by weight of an alkali metal salt.
Claim 3
Dependent Claim
24 words
The material of claim 1 wherein the filler has a superficial surface area in the range of at least about 25 m 2 /g.
Claim 4
Dependent Claim
27 words
The material of claim 1 wherein the filler is selected from the group consisting of substantially water insoluble clays, oxides, peroxides, carbonates, phosphates, sulphates, aluminates and silicates.
Claim 5
Dependent Claim
11 words
The material of claim 1 wherein the filler is attapulgite clay.
Claim 6
Dependent Claim
11 words
The material of claim 1 wherein the filler is fumed alumina.
Claim 7
Dependent Claim
51 words
The material of claim 1 wherein the alkali metal salt is selected from the group consisting of sodium and potassium salts of carbonic acid, formic acid, acetic acid, propionic acid, malic acid, lactic acid, glycolic acid, citric acid, tartaric acid, fumaric acid, oxalic acid, malonic acid, nitric acid, and phosphoric acid.
Claim 8
Dependent Claim
20 words
The material of claim 6 wherein the salt is selected from the group consisting of sodium citrate and potassium citrate.
Claim 9
Dependent Claim
12 words
The material of claim 1 wherein the base web comprises flax fibers.
Claim 10
Dependent Claim
14 words
The material of claim 8 having a porosity of up to about 30 cm/min.
Claim 11
Dependent Claim
23 words
The material of claim 9 wherein the amount of filler is in the range of from about 5 to 50 percent by weight.
Claim 12
Dependent Claim
13 words
The material of claim 1 wherein the web also contains an inorganic filler.
Claim 13
Dependent Claim
13 words
The material of claim 11 wherein the additional inorganic filler is calcium carbonate.
Claim 14
Dependent Claim
18 words
The material of claim 1 wherein the base web has a permeability of up to about 30 cm/min.
Claim 15
Dependent Claim
63 words
The material of claim 1 wherein the filler is selected from the group consisting of attapulgite clay, fumed silica and alumina, peroxides of magnesium, calcium and strontium, carbonates of magnesium, calcium, strontium and barium, phosphates of magnesium, strontium and barium, sulphates of calcium, strontium and barium, aluminates of magnesium, calcium, strontium and barium, and silicates of magnesium, calcium, strontium, barium, sodium and potassium.
Claim 16
Dependent Claim
74 words
A smoking article comprising a tobacco rod surrounded by a wrapper wherein the wrapper comprises a cellulosic base web having a substantially water insoluble and thermally stable filler having a superficial surface area in the range of at least about twenty M 2 /g providing a superficial surface area of at least eighty square meters per square meter of paper and containing up to about 15 percent by weight of an alkali metal salt.
Claim 17
Dependent Claim
74 words
A smoking article comprising a tobacco rod surrounded by a wrapper wherein the wrapper comprises a cellulosic base web having a substantially water insoluble and thermally stable filler having a superficial surface area in the range of at least about twenty M 2 /g providing a superficial surface area of at least eighty square meters per square meter of paper and containing up to about 15 percent by weight of an alkali metal salt.
Claim 18
Dependent Claim
26 words
A smoking article as in claim 15 wherein the filler has a superficial surface area in the range of at least about 25 m 2 /g.
Claim 19
Dependent Claim
65 words
A smoking article as in claim 16 wherein the filler is selected from the group consisting of attapulgite clay, fumed silica and alumina, peroxides of magnesium calcium and strontium, carbonates of magnesium, calcium, strontium and barium, phosphates of magnesium, strontium and barium, sulphates of calcium, strontium and barium aluminates of magnesium, calcium, strontium and barium, and silicates of magnesium, calcium, strontium, barium, sodium and potassium.
Claim 20
Dependent Claim
13 words
A smoking article as in claim 17 wherein the filler is attapulgite clay.
Claim 21
Dependent Claim
13 words
A smoking article as in claim 19 wherein the filler is fumed alumina.