US5772959A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refrigerator freshener
Assignee: Harrison Clifton Inc
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Filing: 1996-10-11
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Granted: 1998-06-30
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Expires: 2016-10-11
Abstract
Abstract A refrigerator freshening device includes an air-permeable container, enclosing a mixture, in particulate form, of a major amount of activated carbon and a minor amount of an odor-absorbing zeolite. The activated carbon is preferably characterized by a good distribution of large and small pores, at least 30 percent of the pores having a diameter of from about 15 to less than about 50 Å and the zeolite by a strong organophilic character and a surface area of at least about 400 square meters per gram. The combination of particulate adsorbent materials preferably includes from about 5 to about 25 percent of the zeolite and from about 75 to about 95 percent of the activated carbon. The device preferably includes a front panel. a back panel, and a package constructed of flexible, porous material enclosing absorbent, wherein the front panel receives the back panel in nesting relationship and encloses the package of adsorbent material. Hooks are preferred to suspend the device freely within a refrigerator. The device maintains a fresh environment within a refrigerator, by acting immediately to delay the buildup of odors when aromatic foods are placed therein and continues to maintain low odor levels for extended times.
Inventors
- 👤 Edward M. Bermas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:40
CPC Classifications
F; F25; F25D; F25D17/00; F25D17/04; F25D17/042; A; A61; A61L; A61L9/00; A61L9/01; A61L9/015; A61L9/04; A61L9/12; F25D2317/00; F25D2317/04; F25D2317/041; F25D2317/0415
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
200 words
A refrigerator freshening device, which is capable of freshening the air in a refrigerator and comprises: a front panel including a rectangular front wall member and four side wall members, the front wall member having an outside surface, an inside surface, and a grid structure Including holes which extend through the front wall member from the inside surface to the outside surface; a back panel, including a rectangular rear wall member and four side wall members, the rear wall member having an outside surface, an inside surface, and a grid structure including holes which extend through the rear wall member from the inside surface to the outside surface; a package constructed of flexible, porous material enclosing an absorbent, in particulate form, consisting essentially of from 75 to 95 percent of active carbon having pores wherein at least 30 percent of the pores have a diameter of from about 15 to less than about 50 Å and from 5 to 25 percent of an odor-absorbing zeolite having an organophilic character and a surface area of at least 400 square meters per gram; and wherein the front panel receives the back panel in nesting relationship and encloses the package of adsorbent material.
Claim 2
Dependent Claim
200 words
A refrigerator freshening device, which is capable of freshening the air in a refrigerator and comprises: a front panel including a rectangular front wall member and four side wall members, the front wall member having an outside surface, an inside surface, and a grid structure Including holes which extend through the front wall member from the inside surface to the outside surface; a back panel, including a rectangular rear wall member and four side wall members, the rear wall member having an outside surface, an inside surface, and a grid structure including holes which extend through the rear wall member from the inside surface to the outside surface; a package constructed of flexible, porous material enclosing an absorbent, in particulate form, consisting essentially of from 75 to 95 percent of active carbon having pores wherein at least 30 percent of the pores have a diameter of from about 15 to less than about 50 Å and from 5 to 25 percent of an odor-absorbing zeolite having an organophilic character and a surface area of at least 400 square meters per gram; and wherein the front panel receives the back panel in nesting relationship and encloses the package of adsorbent material.
Claim 3
Dependent Claim
138 words
A process for maintaining a fresh environment within a refrigerator, by acting immediately to delay the buildup of odors when aromatic foods are placed therein and continuing to maintain low odor levels for extended times, comprising: providing an air-permeable container having enclosed therein an absorbent, in particulate form, consisting essentially of from 75 to 95 percent of active carbon having pores wherein at least 30 percent of the pores have a diameter of from about 15 to less than about 50 Å and from 5 to 25 percent of an odor-absorbing zeolite having an organophilic character and a surface area of at least 400 square meters per gram; and positioning the container within a refrigerator to permit the normal movement of air within the refrigerator to pass by and be deodorized by the active carbon and the zeolite.
Claim 4
Dependent Claim
138 words
A process for maintaining a fresh environment within a refrigerator, by acting immediately to delay the buildup of odors when aromatic foods are placed therein and continuing to maintain low odor levels for extended times, comprising: providing an air-permeable container having enclosed therein an absorbent, in particulate form, consisting essentially of from 75 to 95 percent of active carbon having pores wherein at least 30 percent of the pores have a diameter of from about 15 to less than about 50 Å and from 5 to 25 percent of an odor-absorbing zeolite having an organophilic character and a surface area of at least 400 square meters per gram; and positioning the container within a refrigerator to permit the normal movement of air within the refrigerator to pass by and be deodorized by the active carbon and the zeolite.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-06-29 | 2001-12-29 | 2002-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-06-29 | 2005-12-29 | 2006-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-06-29 | 2009-12-29 | 2010-06-30 | $7700.00 | Window Closed / Lapsed |