US4035543A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laminate suitable as hydrocarbon resistant pond liner
Assignee: Phillips Petroleum Co
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Filing: 1975-05-01
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Granted: 1977-07-12
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Expires: 1995-05-01
Abstract
Abstract A laminate is provided having sufficient strength and hydrocarbon resistance to be used as a pond liner. The laminate has at least one cohesive batt of polypropylene fiber having a weight of about 100 g/m 2 to about 250 g/m 2 heat bonded to at least one polyethylene film having a thickness of about 10 to about 50 mils and a density of about 0.905 to about 0.925 g/cc.
Inventors
- 👤 Homer L. Draper
- 👤 Duane W. Gagle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:05
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/12; B32B27/32; B32B38/00; B32B38/0036; B32B38/004; E; E02; E02B; E02B3/00; E02B3/04; E02B3/12; E02B3/122; E02B3/126; B32B2262/00; B32B2262/02; B32B2262/0276; B32B2307/00; B32B2307/70; B32B2307/718; B32B2307/72; B32B2309/00; B32B2309/08; B32B2309/10; B32B2309/105; B32B2323/00; B32B2323/04; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855; Y10T428/31909; Y10T442/00; Y10T442/30; Y10T442/3472; Y10T442/3602; Y10T442/365; Y10T442/3854; Y10T442/3886; Y10T442/60; Y10T442/659; Y10T442/671; Y10T442/674; Y10T442/678
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
81 words
A pond liner comprising strips of laminate, said laminate comprising polyethylene film having a thickness of about 10 to about 50 mils and a density of about 0.905 to about 0.925 heat bonded to polypropylene fiber having a weight of about 100 g/m 2 to about 250 g/m 2 chosen from (1) woven fabric and (2) needle-punched non-woven batt with said non-woven batt heat fused on at least one side, wherein said strips of laminate are sealed with a liquid-tight seam.
Claim 2
Dependent Claim
81 words
A pond liner comprising strips of laminate, said laminate comprising polyethylene film having a thickness of about 10 to about 50 mils and a density of about 0.905 to about 0.925 heat bonded to polypropylene fiber having a weight of about 100 g/m 2 to about 250 g/m 2 chosen from (1) woven fabric and (2) needle-punched non-woven batt with said non-woven batt heat fused on at least one side, wherein said strips of laminate are sealed with a liquid-tight seam.
Claim 3
Dependent Claim
13 words
A pond liner of claim 1 wherein said strips of laminate are overlapped.
Claim 4
Dependent Claim
23 words
A pond liner of claim 2 wherein in the laminate a film is heat bonded on the unfused side of said polypropylene fiber.
Claim 5
Dependent Claim
22 words
A pond liner of claim 2 wherein in the laminate a film is heat bonded to both sides of said polypropylene fiber.
Claim 6
Dependent Claim
22 words
A pond liner of claim 2 wherein in the laminate said polypropylene fiber is heat bonded to each side of a film.
Claim 7
Dependent Claim
40 words
A pond liner of claim 1 wherein said strips of laminate are butt joined and the joint overlaid with a strip of polyethylene film having a density of about 0.905 to about 0.925 and heat sealed in a liquid-tight seam.
Claim 8
Dependent Claim
23 words
A pond liner of claim 6 wherein in the laminate a film is heat bonded on the unfused side of said polypropylene fiber.
Claim 9
Dependent Claim
22 words
A pond liner of claim 6 wherein in the laminate a film is heat bonded to both sides of said polypropylene fiber.
Claim 10
Dependent Claim
22 words
A pond liner of claim 6 wherein in the laminate said polypropylene fiber is heat bonded to each side of a film.
References Cited (Backward Citations)
US2949394A
Cited
US3282771A
Cited
US3474625A
Cited
US3576687A
Cited
US3666585A
Cited
US3676242A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-07-11 | 1981-01-10 | 1981-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-07-11 | 1985-01-10 | 1985-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-07-11 | 1989-01-10 | 1989-07-12 | $7700.00 | Window Closed / Lapsed |