US4749392A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dehumidifying material
Assignee: Kaken Pharmaceutical Co Ltd
•
Filing: 1986-12-03
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Granted: 1988-06-07
•
Expires: 2006-12-03
Abstract
Abstract A moisture absorbent is sealed between an elastic material and a moisture-permeable film to thereby provide a dehumidifying material having an elastic layer or bed therein. The dehumidifying material may be used in the fields of packing articles such as precision machines and dehydrated food and of dehumidification of beds, cushions, seat covers, lockers and the like.
Inventors
- 👤 Yoshio Aoki
- 👤 Masatoshi Saito
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:51
CPC Classifications
B; B65; B65D; B65D81/00; B65D81/24; B65D81/26; B65D81/266; B65D81/267; A; A47; A47C; A47C27/00; A47C27/002; A47C27/005; B01; B01J; B01J20/00; B01J20/28; B01J20/28014; B01J20/28033; B01J20/2805
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
37 words
An elastic dehumidifying material comprising a flexible material which defines an elastic layer consisting of an air layer sealed air-tightly, a moisture-permeable and water-impervious film, and a moisture absorbent sealed between the flexible material and the film.
Claim 2
Dependent Claim
37 words
An elastic dehumidifying material comprising a flexible material which defines an elastic layer consisting of an air layer sealed air-tightly, a moisture-permeable and water-impervious film, and a moisture absorbent sealed between the flexible material and the film.
Claim 3
Dependent Claim
29 words
The dehumidifying material according to claim 1 wherein the flexible material is selected from the group consisting of plastic sheet, metal foil, water-proof paper, water-proof cloth and rubber sheet.
Claim 4
Dependent Claim
38 words
The dehumidifying material according to claim 1 wherein the moisture absorbent is selected from the group consisting calcium chloride, magnesium chloride, aluminum chloride, lithium chloride, calcium bromide, zinc chloride, phosphorus pentoxide, silica gel, activated alumina and calcium oxide.
Claim 5
Dependent Claim
18 words
The dehumidifying material according to claim 1 wherein the moisture absorbent comprises deliquescence inorganic salt and water-holding substance.
Claim 6
Dependent Claim
19 words
The dehumidifying material according to claim 1 wherein the moisture absorbent comprises deliquescence inorganic salt and hygroscopically hardenable substance.
Claim 7
Dependent Claim
21 words
The dehumidifying material according to claim 1 wherein the moisture absorbent comprises deliquescence inorganic salt, water-holding substance and hygroscopically hardenable substance.
Claim 8
Dependent Claim
16 words
The dehumidifying material according to claim 1 wherein the elastic layer is defined between moisture-absorbent-receiving zones.
Claim 9
Dependent Claim
24 words
The dehumidifying material according to claim 1 wherein the elastic layer is defined on a surface of the flexible material away from moisture-absorbent-receiving zones.
Claim 10
Dependent Claim
16 words
The dehumidifying material according to claim 1 wherein the elastic layer is defined in moisture-absorbent-receiving zones.
Claim 11
Dependent Claim
15 words
The dehumidifying material according to claim 1 wherein the elastic layer is an air layer.
Claim 12
Dependent Claim
10 words
The dehumidifying material according to claim 1 used in packaging.
Claim 13
Dependent Claim
10 words
The dehumidifying material according to claim 1 used in bedding.
Claim 14
Dependent Claim
10 words
The dehumidifying material according to claim 1 used for panels.
Claim 15
Dependent Claim
54 words
An elastic dehumidifying material comprising at least three sheets, the first and second sheets being flexible and air-tightly sealed to each other with air therebetween to define an elastic layer of said dehumidifying material, the third sheet being a moisture-permeable and water-impervious film, and a moisture absorbent sealed between the second and third sheets.
Claim 16
Dependent Claim
54 words
An elastic dehumidifying material comprising at least three sheets, the first and second sheets being flexible and air-tightly sealed to each other with air therebetween to define an elastic layer of said dehumidifying material, the third sheet being a moisture-permeable and water-impervious film, and a moisture absorbent sealed between the second and third sheets.
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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) | 1991-06-07 | 1991-12-07 | 1992-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-06-07 | 1995-12-07 | 1996-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-06-07 | 1999-12-07 | 2000-06-07 | $7700.00 | Window Closed / Lapsed |