US4281492A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sectional construction strip, e.g. for the production of window frames
Assignee: Schock and Co GmbH
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Filing: 1979-06-19
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Granted: 1981-08-04
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Expires: 1999-06-19
Abstract
Abstract The strip comprises a tubular section of thermoplastic material, e.g. PVC, and a fill comprising a matrix of methylmethacrylate with silicate spherules as a filler, reinforced by glass filaments under tension. In production, cold methylmethacrylate is pressed in the extruded section while it is still hot.
Inventors
- 👤 Karl Schock
- 👤 Lothar Frank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:23
CPC Classifications
E; E06; E06B; E06B3/00; E06B3/04; E06B3/06; E06B3/08; E06B3/20; E06B3/22; E06B3/221; B; B29; B29C; B29C31/00; B29C31/002; B29C48/00; B29C48/03; B29C48/07; B29C48/08; B29C48/09; B29C48/12; B29C48/15; B29C48/156; B29C48/25; B29C48/30; B29C48/304; B29C70/00; B29C70/02; B29C70/021; B29C70/025; B29C70/04; B29C70/28; B29C70/54; B29C70/56; B29C70/58; B29C70/66; B29K; B29K2105/00; B29K2105/06; B29K2105/08; B29K2105/16; B29K2105/165; E06B3/205; Y; Y10; Y10S; Y10S264/00; Y10S264/06; Y10S264/18; Y10T; Y10T428/00; Y10T428/25
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
60 words
A sectional construction strip comprising a tubular section of thermosoftening plastics material, preferably PVC and a fill which comprises a matrix of polymerized methylmethacrylate with hollow silicate spherules as a filler, said methylmethacrylate where in contact with said plastics material being cross linked to create the bond between the material of the fill and the material of the tubular section.
Claim 2
Dependent Claim
60 words
A sectional construction strip comprising a tubular section of thermosoftening plastics material, preferably PVC and a fill which comprises a matrix of polymerized methylmethacrylate with hollow silicate spherules as a filler, said methylmethacrylate where in contact with said plastics material being cross linked to create the bond between the material of the fill and the material of the tubular section.
Claim 3
Dependent Claim
24 words
A strip as claimed in claim 1, including filaments extending along the longitudinal orientation of the strips, the filaments being embedded in the fill.
Claim 4
Dependent Claim
14 words
A strip as claimed in claim 2, in which the filaments are glass rovings.
Claim 5
Dependent Claim
18 words
A strip as claimed in claim 2 or 3, in which the filaments are under longitudinal tensile stress.
Claim 6
Independent Claim
73 words
A method of producing a sectional construction strip comprising the steps of: extruding a tubular section of thermosoftening plastic material and pressing a filler comprising a matrix of methylmethacrylate with silicate spherules into said tubular section, the filler being pressed into the tubular section while the filler is in cold state when compared to the relatively hot tubular section effecting polymerization and cross-linking on the inner wall of the relatively hot tubular section.
Claim 7
Independent Claim
73 words
A method of producing a sectional construction strip comprising the steps of: extruding a tubular section of thermosoftening plastic material and pressing a filler comprising a matrix of methylmethacrylate with silicate spherules into said tubular section, the filler being pressed into the tubular section while the filler is in cold state when compared to the relatively hot tubular section effecting polymerization and cross-linking on the inner wall of the relatively hot tubular section.
Claim 8
Independent Claim
27 words
A method as claimed in any of claims 5 in which filaments are inserted in the course of extrusion and are retarded to apply longitudinal tensile stress.
References Cited (Backward Citations)
US3050427A
Cited
DE1086032B
Cited
CH411301A
Cited
FR1279732A
Cited
US3769126A
Cited
US4075265A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-08-03 | 1985-02-02 | 1985-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-08-03 | 1989-02-02 | 1989-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-08-03 | 1993-02-02 | 1993-08-04 | $7700.00 | Window Closed / Lapsed |