US4199472A
Expired / Lapsed
US
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Oxygen absorbent composition
Assignee: Mitsubishi Gas Chemical Co Inc
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Filing: 1977-07-15
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Granted: 1980-04-22
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Expires: 1997-07-15
Abstract
Abstract An oxygen absorbent composition consisting essentially of (a) an oxygen absorbent comprising a dithonite as a main component and (b) a fiber material in an amount of from about 1 to about 50 parts by weight per 100 parts by weight of the oxygen absorbent and a process for producing the same are disclosed.
Inventors
- 👤 Sadao Ohtsuka
- 👤 Takaaki Yamaguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:45
CPC Classifications
C; C09; C09K; C09K15/00; C09K15/04; C09K15/32; C09K15/326; A; A23; A23B; A23B2/00; A23B2/70; A23B2/704; A23B2/708; A23B2/712; A23B2/717; A23B2/725; A23B2/788; C09K15/12
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
48 words
An oxygen absorbent composition consisting essentially of (a) an oxygen absorbent comprising sodium dithionite as a main component and (b) at least one fiber material in an amount of from about 1 part to about 50 parts by weight per 100 parts by weight of the oxygen absorbent.
Claim 2
Dependent Claim
48 words
An oxygen absorbent composition consisting essentially of (a) an oxygen absorbent comprising sodium dithionite as a main component and (b) at least one fiber material in an amount of from about 1 part to about 50 parts by weight per 100 parts by weight of the oxygen absorbent.
Claim 3
Dependent Claim
41 words
The oxygen absorbent composition as defined in claim 1 wherein the amount of the fiber material employed is in the range of from about 1 part to about 10 parts by weight per 100 parts by weight of the oxygen absorbent.
Claim 4
Dependent Claim
41 words
The oxygen absorbent composition as defined in claim 1 wherein the amount of the fiber material employed is in the range of from about 3 parts to about 5 parts by weight per 100 parts by weight of the oxygen absorbent.
Claim 5
Dependent Claim
16 words
The oxygen absorbent composition as defined in claim 1 wherein the fiber material is powdery pulp.
Claim 6
Dependent Claim
16 words
The oxygen absorbent composition as defined in claim 1 wherein the fiber material is powdery cellulose.
Claim 7
Dependent Claim
26 words
The oxygen absorbent composition as defined in claim 1 wherein the oxygen absorbent comprising sodium dithionite as a main component contains an anhydrous dithionite and water.
Claim 8
Dependent Claim
42 words
The oxygen absorbent composition as defined in claim 1 wherein the oxygen absorbent comprising sodium dithionite as a main component contains an anhydrous dithionite, water and at least one material selected from the group consisting of an alkaline material and activated carbon.
Claim 9
Dependent Claim
27 words
The oxygen absorbent composition as defined in claim 1 wherein the oxygen absorbent comprising sodium dithionite as a main component contains an anhydrous dithionite and an alcohol.
Claim 10
Dependent Claim
43 words
The oxygen absorbent composition as defined in claim 1 wherein the oxygen absorbent comprising sodium dithionite as a main component contains an anhydrous dithionite, an alcohol and at least one material selected from the group consisting of an alkaline material and activated carbon.
Claim 11
Dependent Claim
32 words
The oxygen absorbent composition as defined in claim 4 wherein more than 90% of the powdery pulp passes through 50 mesh and less than 60% of the pulp passes through 250 mesh.
Claim 12
Dependent Claim
17 words
The oxygen absorbent composition as defined in claim 5 wherein the powdery cellulose contains the amorphous portion.
Claim 13
Dependent Claim
31 words
The oxygen absorbent composition as defined in claim 5 wherein more than 90% of the cellulose passes through 50 mesh and less than 60% of the pulp passes through 250 mesh.
Claim 14
Dependent Claim
16 words
The oxygen absorbent composition as defined in claim 6 wherein the water is water of crystallization.
Claim 15
Dependent Claim
16 words
The oxygen absorbent composition as defined in claim 7 wherein the water is water of crystallization.
Claim 16
Dependent Claim
16 words
The oxygen absorbent composition as defined in claim 7 wherein the alkaline material is calcium hydroxide.
Claim 17
Dependent Claim
33 words
The oxygen absorbent composition as defined in claim 8 wherein the alcohol is selected from the group consisting of alkylene glycols, glycerine and its alkyl derivatives, and has at least one hydroxy group.
Claim 18
Dependent Claim
15 words
The oxygen absorbent composition as defined in claim 8 wherein the alcohol is ethylene glycol.
Claim 19
Dependent Claim
33 words
The oxygen absorbent composition as defined in claim 9 wherein the alcohol is selected from the group consisting of alkylene glycols, glycerine and its alkyl derivatives, and has at least one hydroxy group.
Claim 20
Dependent Claim
15 words
The oxygen absorbent composition as defined in claim 9 wherein the alcohol is ethylene glycol.
Claim 21
Dependent Claim
16 words
The oxygen absorbent composition as defined in claim 9 wherein the alkaline material is calcium hydroxide.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-04-22 | 1983-10-22 | 1984-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-04-22 | 1987-10-22 | 1988-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-04-22 | 1991-10-22 | 1992-04-22 | $7700.00 | Window Closed / Lapsed |