US5476343A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Offshore pipeline insulated with a cementitious coating
Assignee: Individual
•
Filing: 1992-11-30
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Granted: 1995-12-19
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Expires: 2012-11-30
Abstract
Abstract An improved thermally insulated, impact and abrasion resistant pipeline and an impact resistant, flexible, cementitious material which maintains low thermal conductivity when submerged and which is suitable for insulating underwater pipelines, said material comprising: hydraulic cement, a closed cell aggregate which exhibits low water absorption under high hydrostatic pressure and a polymeric modifier which increases flexibility and reduces porosity of the cured cementitious material.
Inventors
- 👤 Glen R. Sumner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:16
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/02; C04B28/06; C04B28/04; F; F16; F16L; F16L1/00; F16L1/12; F16L1/123; F16L57/00; F16L57/06; F16L59/00; F16L59/14; F16L59/143; C04B2111/00; C04B2111/00474; C04B2111/00663; C04B2111/00706; C04B2111/20; C04B2111/28; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/91
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
135 words
An insulated under water pipeline comprising in combination: (a) continuous section of pipe; and (b) an insulation mixture comprising: (i) 40 to 55 weight percent of a binder component comprising; (1) 30 parts by weight of hydraulic cement; (2) 0 to 9 parts by weight of silica fume; and (3) 0.1 to 1 parts by weight polymeric modifier; and (ii) 40 to 25 weight percent fly ash cenospheres, glass microspheres or a combination of the two; and (iii) water in sufficient quantity to achieve the desired consistency, normally 19 to 23 percent; said insulation mixture exhibiting flexibility, high impact and abrasion resistance, and low thermal conductivity when submerged, which is applied to the outer surface of said pipe to a thickness necessary to provide physical strength and thermal insulation and cured or otherwise affixed thereon.
Claim 2
Dependent Claim
135 words
An insulated under water pipeline comprising in combination: (a) continuous section of pipe; and (b) an insulation mixture comprising: (i) 40 to 55 weight percent of a binder component comprising; (1) 30 parts by weight of hydraulic cement; (2) 0 to 9 parts by weight of silica fume; and (3) 0.1 to 1 parts by weight polymeric modifier; and (ii) 40 to 25 weight percent fly ash cenospheres, glass microspheres or a combination of the two; and (iii) water in sufficient quantity to achieve the desired consistency, normally 19 to 23 percent; said insulation mixture exhibiting flexibility, high impact and abrasion resistance, and low thermal conductivity when submerged, which is applied to the outer surface of said pipe to a thickness necessary to provide physical strength and thermal insulation and cured or otherwise affixed thereon.
Claim 3
Dependent Claim
21 words
The insulated under water pipeline according to claim 1 wherein said polymeric modifier comprises a polyacrylate, butadiene, styrene/butadiene latex or epoxy.
Claim 4
Dependent Claim
65 words
The insulated under water pipeline according to claim 1 wherein some or all of said polymeric modifier is a wax or thermoplastic material, and which during or after curing, said composition is heated to a temperature above the melting point of the wax or thermoplastic material and held at that temperature long enough for the polymer to melt and disperse into the voids and cracks.
Claim 5
Dependent Claim
29 words
The insulated under water pipeline according to claim 1, wherein the hydraulic cement is portland cement, high alumina cement or a combination of portland cement and high alumina cement.
Claim 6
Dependent Claim
13 words
The insulated under water pipeline according to claim 1 wherein fibers are dispersed.
Claim 7
Dependent Claim
14 words
The insulated under water pipeline according to claim 1 wherein water repellents are added.
Claim 8
Dependent Claim
29 words
The insulated under water pipeline according to claim 2, wherein the hydraulic cement is portland cement, high alumina cement or a combination of portland cement and high alumina cement.
Claim 9
Dependent Claim
29 words
The insulated under water pipeline according to claim 3, wherein the hydraulic cement is portland cement, high alumina cement or a combination of portland cement and high alumina cement.
Claim 10
Dependent Claim
13 words
the insulated under water pipeline according to claim 2 wherein fibers are dispersed.
Claim 11
Dependent Claim
13 words
The insulated under water pipeline according to claim 3 wherein fibers are dispersed.
Claim 12
Dependent Claim
18 words
The insulated under water pipeline according to claim 8 additionally containing 1 to 2 weight percent super plasticizer.
Claim 13
Dependent Claim
15 words
The pipeline according to claim 1 wherein said closed cell aggregate comprises fly ash cenospheres.
Claim 14
Dependent Claim
14 words
The pipeline according to claim 1 wherein said closed cell aggregate comprises glass microspheres.
Claim 15
Dependent Claim
16 words
The insulated under water pipeline according to claim 2 wherein said polymeric modifier comprises a polyacrylate.
Claim 16
Dependent Claim
17 words
The insulated under water pipeline according to claim 2 wherein said polymeric modifier comprises butadiene, styrene/butadiene latex.
Claim 17
Dependent Claim
15 words
The insulated under water pipeline according to claim 2 wherein said polymeric modifier comprises epoxy.
Claim 18
Dependent Claim
20 words
The insulated under water pipeline according to claim 3 wherein some or all of said polymeric modifier is a wax.
Claim 19
Dependent Claim
21 words
The insulated under water pipeline according to claim 16 wherein some or all of said polymeric modifier is a thermoplastic material.
Claim 20
Dependent Claim
15 words
The insulated under water pipeline according to claim 1 wherein fly ash cenospheres are present.
Claim 21
Dependent Claim
14 words
The insulated under water pipeline according to claim 1 wherein glass microspheres are present.
Claim 22
Dependent Claim
18 words
The insulated under water pipeline according to claim 1 wherein fly ash cenospheres and glass microspheres are present.
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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) | 1998-12-18 | 1999-06-19 | 1999-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-12-18 | 2003-06-19 | 2003-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-12-18 | 2007-06-19 | 2007-12-19 | $7700.00 | Window Closed / Lapsed |