Patent US4421807A successfully refreshed from Google Patents.
US4421807A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sheet-like sealing web
Assignee: WR Grace and Co Conn
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Filing: 1982-02-24
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Granted: 1983-12-20
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Expires: 2002-02-24
Abstract
Abstract A sheet-like sealing web for use in construction above and under ground comprises a resilient elastic pressure-sensitive adhesive and sealing composition enclosed between two flexible layers, said lower layer not covering the sealing composition in the vicinity of one longitudinal edge of the web and said upper layer not covering the sealing composition in the vicinity of the opposite longitudinal edge of the web, thus forming two exposed sealing strips for bonding the webs to each other in an overlapping position. The novel sealing web can be further modified so that the adhesive and coating composition is not covered by said upper and said lower flexible layer in a narrow area along the longitudinal edges of the web opposite to the sealing strips, thus forming two exposed fixation strips for securing the web to a substrate or for bonding a cover material to the sealing web.
Inventors
- 👤 Rudiger Clausing
- 👤 Werner Schunter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:49
CPC Classifications
E; E04; E04D; E04D5/00; E04D5/10; Y; Y10; Y10T; Y10T428/00; Y10T428/14; Y10T428/141; Y10T428/24; Y10T428/24777; Y10T428/24785; Y10T428/24793; Y10T428/26; Y10T428/28; Y10T428/2804; Y10T428/2835; Y10T428/2848; Y10T428/31504; Y10T428/31815
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
138 words
A sheet-like sealing web for use in construction above and under ground comprising a layer of resilient elastic pressure sensitive adhesive and sealing composition having upper and lower surfaces disposed between respective upper and lower flexible layers covering a major portion of the area of said upper and lower surfaces with the longitudinal edges of said upper and lower surfaces being exposed, thereby forming first and second exposed sealing strips at opposite longitudinal edges of said upper and lower surfaces for overlap bonding of said web to adjacent identical webs and first and second fixation strips at the longitudinal edges of said upper and lower surfaces opposite said sealing strips for securing the web to a substrate or for bonding a cover material to the sealing web, said fixation strips being narrower than either of said sealing strips.
Claim 2
Dependent Claim
138 words
A sheet-like sealing web for use in construction above and under ground comprising a layer of resilient elastic pressure sensitive adhesive and sealing composition having upper and lower surfaces disposed between respective upper and lower flexible layers covering a major portion of the area of said upper and lower surfaces with the longitudinal edges of said upper and lower surfaces being exposed, thereby forming first and second exposed sealing strips at opposite longitudinal edges of said upper and lower surfaces for overlap bonding of said web to adjacent identical webs and first and second fixation strips at the longitudinal edges of said upper and lower surfaces opposite said sealing strips for securing the web to a substrate or for bonding a cover material to the sealing web, said fixation strips being narrower than either of said sealing strips.
Claim 3
Dependent Claim
26 words
The sealing web of claim 1, characterized in that the resilient elastic adhesive and sealing composition has a coating thickness between 0.5 mm. and 3 mm.
Claim 4
Dependent Claim
26 words
The sealing web of claim 1, characterized in that said upper and lower flexible layers are polyolefin films with a thickness of 40 to 500 microns.
Claim 5
Dependent Claim
42 words
The sealing web of claim 1, characterized in that said first and second sealing strips each have a width of about 4 to 8 cm and said first and second fixation strips each have a width of about 0.5 to 2 cm.
Claim 6
Dependent Claim
20 words
The sealing web of claim 1, characterized in that the exposed adhesive areas are covered with a removable protective foil.
Claim 7
Dependent Claim
38 words
The sealing web of claim 1, characterized in that said upper flexible layer is selected from the group consisting of rubber sheets, plastic films, metal foils, metal coated plastic films, and laminated metal foils between two plastic films.
Claim 8
Dependent Claim
19 words
The sealing web of claim 6, characterized in that said upper and lower flexible layers are laminated plastic films.
Claim 9
Dependent Claim
50 words
The sealing web of claim 1, characterized in that said lower flexible layer is selected from the group consisting of rubber sheets, plastic films, metal foils, metal coated plastic films, laminated metal foils between two plastic films, non-woven fabrics, metal wire screen fabrics, and films lined with a non-woven fabric.
Claim 10
Dependent Claim
27 words
The sealing web of claim 1, characterized in that the adhesive and sealing composition is a bitumen or bitumen/rubber or plastic adhesive composition with pressure-sensitive adhesive properties.
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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) | 1986-12-19 | 1987-06-20 | 1987-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-12-19 | 1991-06-20 | 1991-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-12-19 | 1995-06-20 | 1995-12-20 | $7700.00 | Window Closed / Lapsed |