US4756726A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Regenerable dehumidifier
Assignee: Individual
•
Filing: 1986-11-20
•
Granted: 1988-07-12
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Expires: 2006-11-20
Abstract
Abstract A dehumidifier device is provided for absorbing water vapor from ambient air. The device is comprised of a container constructed of fabric woven from multifilament yarns of fiberglass, and confining granular desiccant material such as silica gel having a visibly distinctive moisture indicator. The fabric is of a critically selected construction that permits visual observation of the confined granules through the fabric while effectively retaining the granules. The device is capable of repeated cycles of absorption of moisture and thermally induced desorption.
Inventors
- 👤 Terry Peace
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:12
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/26; B01D53/261; Y; Y10; Y10S; Y10S55/00; Y10S55/45
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
84 words
A dehumidifier device comprising: (a) a container constructed of fabric woven from continuous multifilament yarns of fiberglass and comprised of several elongated compartments in parallel juxtaposition having borders sealed by thermally resistant closure means, said fabric being of a translucent nature yet having interstices between yarns measuring less than 1.25 millimeter, and (b) dessicant granules confined within said container, said granules containing a visibly distinctive moisture indicating substance, the size of said granules being larger than the size of the interstices of said fabric.
Claim 2
Dependent Claim
84 words
A dehumidifier device comprising: (a) a container constructed of fabric woven from continuous multifilament yarns of fiberglass and comprised of several elongated compartments in parallel juxtaposition having borders sealed by thermally resistant closure means, said fabric being of a translucent nature yet having interstices between yarns measuring less than 1.25 millimeter, and (b) dessicant granules confined within said container, said granules containing a visibly distinctive moisture indicating substance, the size of said granules being larger than the size of the interstices of said fabric.
Claim 3
Dependent Claim
21 words
The dehumdifier device of claim 1 wherein said thermally resistant closure means is a fiberglass yarn utilized in a sewing manner.
Claim 4
Dependent Claim
13 words
The dehumidifier device of claim 1 wherein said desiccant granules are silica gel.
Claim 5
Dependent Claim
18 words
The dehumidifier device of claim 1 wherein said moisture indicating substance is a thermally resistant inorganic cobalt compound.
Claim 6
Dependent Claim
23 words
The dehumidifier device of claim 1 wherein said container is filled to between 60% and 85% of its full capacity with said granules.
Claim 7
Dependent Claim
45 words
The dehumidifer device of claim 1 wherein each filament within the yarn has a diameter between 0.0001 and 0.0005 inch, the yarn has a twist of between 0.3 and 1.0 turns per inch, and the diameter of the twisted yarn is less than 0.007 inch.
Claim 8
Dependent Claim
36 words
The dehumidifier device of claim 6 wherein said fabric is of square-type weave having between 30 and 50 yarns per inch in each direction, and has a weight between 1 and 8 ounces per square yard.
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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) | 1991-07-12 | 1992-01-11 | 1992-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-07-12 | 1996-01-11 | 1996-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-07-12 | 2000-01-11 | 2000-07-12 | $7700.00 | Window Closed / Lapsed |