Patent US1436595A successfully refreshed from Google Patents.
US4122230A
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US
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Flashing article comprising a chlorinated polyethylene layer adhered to an asphalt-saturated felt layer produced by joining the two layers under pressure at elevated temperature
Assignee: Individual
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Filing: 1977-04-22
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Granted: 1978-10-24
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Expires: 1997-04-22
Abstract
Abstract Roof drain flashing constituting a tough flexible material bondable to any type roof membrane and capable of accommodating thermal expansion and contraction of the roof without cracking and leaking at the drain, being a layer of nonplasticized chlorinated polyethylene integrally and irreversibly joined to a layer of asphalt-saturated roofing felt. The non-plasticized chlorinated polyethylene is physically joined to the asphalt-saturated felt by pressing the two together at pressures in the 4000 PSI range just subsequent to the CPE being extruded and cooled to the 250° F range, having passed through the extrusion die at considerably higher temperatures.
Inventors
- 👤 Ben T. Lowell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:20
CPC Classifications
E; E04; E04D; E04D13/00; E04D13/04; E04D13/0404; E04D13/0409; E04D2013/0436; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31815; Y10T442/00; Y10T442/20; Y10T442/2369
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
52 words
Roof drain flashing material characterized by capacity to be hot mopped into a bonded relationship with asphalt-saturated felt roofing membranes, nontearing, noncracking, flexible, and tough, comprising: nonplasticized chlorinated polyethylene material which has been integrally bonded under elevated temperatures and pressures with asphalt-saturated felt into a unitized, inseparable, stretchable roof drain flashing structure.
Claim 2
Dependent Claim
52 words
Roof drain flashing material characterized by capacity to be hot mopped into a bonded relationship with asphalt-saturated felt roofing membranes, nontearing, noncracking, flexible, and tough, comprising: nonplasticized chlorinated polyethylene material which has been integrally bonded under elevated temperatures and pressures with asphalt-saturated felt into a unitized, inseparable, stretchable roof drain flashing structure.
References Cited (Backward Citations)
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US3641216A
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US3721578A
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US3953974A
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US3950207A
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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) | 1981-10-23 | 1982-04-24 | 1982-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-10-23 | 1986-04-24 | 1986-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-10-23 | 1990-04-24 | 1990-10-24 | $7700.00 | Window Closed / Lapsed |