US4366179A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxygen and carbon dioxide absorbent and process for storing coffee by using the same
Assignee: Mitsubishi Gas Chemical Co Inc
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Filing: 1981-03-11
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Granted: 1982-12-28
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Expires: 2001-03-11
Abstract
Abstract An oxygen and carbon dioxide absorbent comprising (A) a particulate substance wherein the particles of a hydrous alkali substance are covered with separator particles, (B) iron powder and (C) an electrolyte and a process for storing coffee by using the same is disclosed.
Inventors
- 👤 Takanari Nawata
- 👤 Toshio Komatsu
- 👤 Masayuki Ohtsuka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:21
CPC Classifications
A; A23; A23B; A23B2/00; A23B2/70; A23B2/704; A23B2/708; A23B2/712; A23B2/717; A23F; A23F5/00; A23F5/10; A23F5/105; B; B01; B01J; B01J20/00; B01J20/02; B01J20/04; B01J20/041; B01J20/10; B01J20/12; Y; Y02; Y02C; Y02C20/00; Y02C20/40
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
57 words
A method for storing roast coffee powder or beans in a hermetically sealed container made of a substantially gas impermeable packing material that also contains an oxygen and carbon dioxide absorbent comprising (a) a particulate calcium hydroxide impregnated with water or a moisture-conditioning solution and then coated with separator particles, (b) iron powder, and (c) an electrolyte.
Claim 2
Independent Claim
57 words
A method for storing roast coffee powder or beans in a hermetically sealed container made of a substantially gas impermeable packing material that also contains an oxygen and carbon dioxide absorbent comprising (a) a particulate calcium hydroxide impregnated with water or a moisture-conditioning solution and then coated with separator particles, (b) iron powder, and (c) an electrolyte.
Claim 3
Dependent Claim
38 words
A method according to claim 1 wherein the equilibrium relative humidity of the particulate substance (a) is so adjusted that the relative humidity at 25° C. of a nitrogen-filled enclosure of the oyxgen absorber is more than 30%.
Claim 4
Dependent Claim
19 words
A method according to claim 1 wherein the calcium hydroxide has a particle size of more than 0.5 mm.
Claim 5
Dependent Claim
21 words
A method according to claim 1 wherein the moisture-conditioning solution is an aqueous solution of a hydrophilic inorganic or organic compound.
Claim 6
Dependent Claim
18 words
A method according to claim 1 wherein the separator particles are finer than a size of 100 mesh.
Claim 7
Dependent Claim
32 words
A method according to claim 1 wherein the separator particles are selected from the group consisting of gypsum, plaster of Paris, calcium carbonate, activated carbon, talc, silica, carbon black, zeolite and bentonite.
Claim 8
Dependent Claim
15 words
A method according to claim 1 wherein the electrolyte is at least one metal halide.
Claim 9
Dependent Claim
20 words
A method according to claim 1 wherein the iron powder (b) is covered with a coating of the electrolyte (c).
References Cited (Backward Citations)
US2430663A
Cited
US3519384A
Cited
US4127503A
Cited
US4166807A
Cited
US4192773A
Cited
US4230595A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-12-27 | 1986-06-28 | 1986-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-12-27 | 1990-06-28 | 1990-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-12-27 | 1994-06-28 | 1994-12-28 | $7700.00 | Window Closed / Lapsed |