US4138516A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pipe coating composition
Assignee: Phillips Petroleum Co
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Filing: 1977-08-08
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Granted: 1979-02-06
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Expires: 1997-08-08
Abstract
Abstract A pipe coating composition consisting essentially of a binder, mineral aggregates, a finely divided mineral filler and synthetic organic fibers exhibits improved cracking time as compared to a pipe coating composition containing glass fibers instead of the organic fibers.
Inventors
- 👤 Oren L. Marrs
- 👤 Robert E. Reusser
- 👤 Dale O. Tieszen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:17
CPC Classifications
F; F16; F16L; F16L58/00; F16L58/02; F16L58/04; F16L58/12; C; C08; C08K; C08K3/00; C08K3/01; C08K3/013; C08L; C08L23/00; C08L23/26; C08L23/28; C08L27/00; C08L27/02; C08L27/12; C08L27/18; C08L67/00; C08L77/00; C08L81/00; C08L81/04; C08L95/00; C09; C09D; C09D195/00; Y; Y10; Y10S; Y10S138/00; Y10S138/02; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/1355; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2964; Y10T428/2967; Y10T428/2969; Y10T428/31504; Y10T428/31678; Y10T428/31717
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
84 words
A coated pipe consisting essentially of a metal pipe having an exterior coating covering essentially the entire external surface of the pipe, said coating consisting essentially of about 50 to 70 wt. % of a mineral aggregate, about 5 to 20 wt. % of asphalt, about 15 to 35 wt. % of a finely divided mineral filler, and about 0.05 to 0.5 wt. % of synthetic organic fibers selected from the group consisting of polyester fibers, polyamide fibers, polyfluorocarbon fibers and poly(arylene sulfide) fibers.
Claim 2
Dependent Claim
84 words
A coated pipe consisting essentially of a metal pipe having an exterior coating covering essentially the entire external surface of the pipe, said coating consisting essentially of about 50 to 70 wt. % of a mineral aggregate, about 5 to 20 wt. % of asphalt, about 15 to 35 wt. % of a finely divided mineral filler, and about 0.05 to 0.5 wt. % of synthetic organic fibers selected from the group consisting of polyester fibers, polyamide fibers, polyfluorocarbon fibers and poly(arylene sulfide) fibers.
Claim 3
Dependent Claim
14 words
A coated pipe in accordance with claim 1 wherein said mineral aggregate is sand.
Claim 4
Dependent Claim
17 words
A coated pipe in accordance with claim 1 wherein said finely divided mineral filler is limestone dust.
Claim 5
Dependent Claim
18 words
A coated pipe in accordance with claim 1 wherein said synthetic organic fiber is a poly(p-phenylene sulfide) fiber.
Claim 6
Dependent Claim
32 words
A coated pipe in accordance with claim 1 wherein said synthetic organic fiber has a length of about 1 to 15 mm and a fiber weight of about 1 to 16 denier.
Claim 7
Dependent Claim
82 words
A process for producing a coated pipe which comprises applying a layer of a composition consisting essentially of about 50 to 70 wt. % of a mineral aggregate, about 5 to 20 wt. % of asphalt, about 15 to 35 wt. % of a finely divided mineral filler, and about 0.05 to 0.5 wt. % of synthetic organic fibers selected from the group consisting of polyester fibers, polyamide fibers, polyfluorocarbon fibers and poly(arylene sulfide) fibers onto the external surface of a pipe.
Claim 8
Dependent Claim
82 words
A process for producing a coated pipe which comprises applying a layer of a composition consisting essentially of about 50 to 70 wt. % of a mineral aggregate, about 5 to 20 wt. % of asphalt, about 15 to 35 wt. % of a finely divided mineral filler, and about 0.05 to 0.5 wt. % of synthetic organic fibers selected from the group consisting of polyester fibers, polyamide fibers, polyfluorocarbon fibers and poly(arylene sulfide) fibers onto the external surface of a pipe.
Claim 9
Dependent Claim
21 words
A process in accordance with claim 6 wherein said layer is applied in a thickness of about 0.5 to 4 mm.
Claim 10
Dependent Claim
49 words
A process in accordance with claim 6 wherein the external surface of the pipe is first covered with a thin primer layer of asphalt having a thickness of about 0.05 to 1 mm, and wherein the layer of said composition is applied on top of this asphalt primer layer.
Claim 11
Dependent Claim
72 words
A process in accordance with claim 6 wherein said mineral aggregate, said finely divided mineral filler, and said synthetic organic fiber are mixed to form a dry mixture, wherein this dry mixture, having a temperature of about 175° to about 260° C., and molten asphalt having about the same temperature as said dry mixture are blended thoroughly to form a hot mastic and wherein this hot mastic is applied to the pipe.
References Cited (Backward Citations)
US1988628A
Cited
US2472100A
Cited
US2507629A
Cited
US3470006A
Cited
US3497372A
Cited
US3526525A
Cited
US3574652A
Cited
US3645961A
Cited
US3898204A
Cited
US4052219A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-02-05 | 1982-08-07 | 1983-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-02-05 | 1986-08-07 | 1987-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-02-05 | 1990-08-07 | 1991-02-06 | $7700.00 | Window Closed / Lapsed |