US3758996A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple glazed unit
Assignee: PPG Industries Inc
•
Filing: 1972-05-05
•
Granted: 1973-09-18
•
Expires: 1992-05-05
Abstract
Abstract A hermetically sealed multiple glazed window unit containing an air space dehydrator element comprising a desiccant material dispersed in a matrix of moisture vapor transmittable material.
Inventors
- 👤 G Bowser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:32
CPC Classifications
E; E06; E06B; E06B3/00; E06B3/66; E06B3/677
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
19 words
The multiple glazed unit of claim 1 wherein at least one of said rigid sheets is comprised of glass.
Claim 2
Dependent Claim
17 words
The multiple glazed unit of claim 1 wherein both of said rigid sheets are comprised of glass.
Claim 3
Dependent Claim
27 words
The multiple glazed unit of claim 1 wherein the spacer-dehydrator element comprises separate spacer and dehydrator elements, the dehydrator element comprising said desiccant dispersed in said matrix.
Claim 4
Dependent Claim
13 words
The multiple glazed unit of claim 1 wherein the matrix is an elastomer.
Claim 5
Dependent Claim
25 words
The multiple glazed unit of claim 1 wherein the matrix is an elastomer and the desiccant is a powder which is dispersed in the elastomer.
Claim 6
Dependent Claim
30 words
The multiple glazed unit of clAim 1 wherein said moisture vapor transmittable material has a water vapor transmission of above about 15 gm./24 hr./1 sq. meter/mil at 100*F., 90% R.H.
Claim 7
Dependent Claim
30 words
The multiple glazed unit of claim 1 wherein said moisture vapor transmittable material has a water vapor transmission of above about 40 gm./24 hr./1 sq. meter/mil at 100*F., 90% R.H.
Claim 8
Dependent Claim
30 words
The multiple glazed unit of claim 1 wherein said moisture vapor transmittable material has a water vapor transmission of above about 50 gm./24 hr./1 sq. meter/mil at 100*F., 90% R.H.
Claim 9
Dependent Claim
17 words
The multiple glazed unit of claim 1 wherein said moisture vapor transmittable material comprises a flexible material.
Claim 10
Dependent Claim
15 words
The multiple glazed unit of claim 1 wherein said desiccant material comprises an adsorbent material.
Claim 11
Dependent Claim
20 words
The multiple glazed unit of claim 1 wherein said moisture vapor transmittable material comprises a block copolymer of styrene-butadiene rubber.
Claim 12
Dependent Claim
14 words
The multiple glazed unit of claim 11 wherein said adsorbent material comprises a zeolite.
Claim 13
Dependent Claim
15 words
The multiple glazed unit of claim 13 wherein said zeolite comprises a crystalline metal aluminosilicate.
Claim 14
Dependent Claim
20 words
The multiple glazed unit of claim 14 wherein said moisture vapor transmittable material comprises a block copolymer of styrene-butadiene rubber.
Claim 15
Dependent Claim
14 words
The multiple glazed unit of claim 1 wherein said moisture-resistant material is air impermeable.
Claim 16
Dependent Claim
22 words
The multiple glazed unit of claim 1 which further includes a moisture-resistant material extending between said opposing surfaces and said spacer-dehydrator element.
Claim 17
Dependent Claim
21 words
The multiple glazed unit of claim 1 wherein said moisture-resistant material extends across the adjacent peripheral edges of said rigid sheets.
Claim 18
Dependent Claim
15 words
The multiple glazed unit of claim 1 wherein said moisture-resistant material is a thermoplastic material.
Claim 19
Dependent Claim
15 words
The multiple glazed unit of claim 1 wherein said moisture-resistant material is a curable material.
Claim 20
Dependent Claim
23 words
The multiple glazed unit of claim 1 which further includes a metallic member extending in circumscribing relation about the periphery of said unit.
Claim 21
Dependent Claim
24 words
The multiple glazed unit of claim 1 which further includes a synthetic plastic member extending in circumscribing relation about the periphery of said unit.
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) | 1976-09-17 | 1977-03-19 | 1977-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-17 | 1981-03-19 | 1981-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-17 | 1985-03-19 | 1985-09-18 | $7700.00 | Window Closed / Lapsed |