Patent US1564075A successfully refreshed from Google Patents.
Patent US4397894A successfully refreshed from Google Patents.
US4397894A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vinyl faced wallboard
Assignee: Armstrong World Industries Inc
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Filing: 1982-03-22
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Granted: 1983-08-09
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Expires: 2002-03-22
Abstract
Abstract The invention is directed to a wallboard structure which is first composed of a base sheet having a dense upper surface region. Over the dense surface region there is placed a vinyl sheet. Perforations are placed through the vinyl sheet and through the dense surface region and partly into the base region so there is formed an acoustical vinyl faced wallboard.
Inventors
- 👤 Charles Haines, Jr.
- 👤 Raymond C. Kent
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:20
CPC Classifications
B; B32; B32B; B32B3/00; B32B3/26; B32B27/00; B32B27/12; B32B7/00; B32B7/04; B32B7/12; E; E04; E04C; E04C2/00; E04C2/02; E04C2/10; E04C2/24; E04C2/246; E04F; E04F13/00; E04F13/07; E04F13/08; E04F13/0867; B32B2607/00; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24273; Y10T428/24322; Y10T428/24331; Y10T428/24942; Y10T428/24992; Y10T428/31504; Y10T428/31855; Y10T428/3188; Y10T428/31895
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
67 words
A wallboard comprising: (a) a base sheet composed of two regions, the upper region being of a greater density than the lower region (b) a vinyl sheet positioned over the surface of the denser region and fastened thereto, and (c) small perforations extending through the vinyl sheet, the denser upper region of the base sheet and partly into the less dense lower region of the base sheet.
Claim 2
Dependent Claim
67 words
A wallboard comprising: (a) a base sheet composed of two regions, the upper region being of a greater density than the lower region (b) a vinyl sheet positioned over the surface of the denser region and fastened thereto, and (c) small perforations extending through the vinyl sheet, the denser upper region of the base sheet and partly into the less dense lower region of the base sheet.
Claim 3
Dependent Claim
43 words
The wallboard panel of claim 1 wherein the base sheet is a mineral fiber board and has a density of about 2.40 pounds per board foot for the upper region and a density of 2.00 pounds per board foot for the lower region.
Claim 4
Dependent Claim
20 words
The wallboard panel of claim 2 wherein the denser upper region is 33% of the overall thickness of the board.
Claim 5
Dependent Claim
15 words
The wall panel of claim 1 wherein the perforations are approximately 0.075 mils in diameter.
Claim 6
Dependent Claim
16 words
A wall panel set forth in claim 1 wherein the vinyl sheet is 20 mils thick.
Claim 7
Dependent Claim
41 words
A wall panel set forth in claim 1 wherein the perforations which extend through the vinyl sheet, the denser upper layer and the less denser lower region are all of the same diameter and are in register one above the other.
References Cited (Backward Citations)
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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) | 1986-08-08 | 1987-02-07 | 1987-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-08 | 1991-02-07 | 1991-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-08 | 1995-02-07 | 1995-08-09 | $7700.00 | Window Closed / Lapsed |