US3753352A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Perforate conduit
Assignee: Phillips Petroleum Co
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Filing: 1971-05-21
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Granted: 1973-08-21
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Expires: 1991-05-21
Abstract
Abstract A perforate conduit comprising an elongated tubing provided with at least one series of longitudinally extending, spaced apart ridges formed in the wall of and extending outwardly from the surface of said tubing. At least one opening is provided in each of said ridges so as to provide communication between the exterior and interior of said tubing.
Inventors
- 👤 P Mcnally
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:11
CPC Classifications
E; E02; E02B; E02B11/00; E02B11/005; B; B26; B26F; B26F1/00; B26F1/0015; B26F1/0053; B29; B29C; B29C59/00; B29C59/02; B29C59/021; F; F16; F16L; F16L9/00; F16L9/12; F16L9/127
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
71 words
A perforate drainage and distribution conduit, comprising: an elongated tubing of a resilient but rigid plastic material; at least one series of longitudinally extending, longitudinally spaced apart ridges formed in not more than one-half of the wall of and exending from a surface of said tubing; and at least one opening provided in each of said ridges so as to provide communication between the exterior and the interior of said tubing.
Claim 2
Dependent Claim
71 words
A perforate drainage and distribution conduit, comprising: an elongated tubing of a resilient but rigid plastic material; at least one series of longitudinally extending, longitudinally spaced apart ridges formed in not more than one-half of the wall of and exending from a surface of said tubing; and at least one opening provided in each of said ridges so as to provide communication between the exterior and the interior of said tubing.
Claim 3
Dependent Claim
18 words
A conduit according to claim 1 wherein said ridges extend outwardly from the outer surface of said tubing.
Claim 4
Dependent Claim
18 words
A conduit in accordance with claim 2 wherein said spaced apart ridges are aligned longitudinally of said tubing.
Claim 5
Dependent Claim
34 words
A conduit according to claim 3 wherein a plurality of series of said ridges are provided in said tubing, and said series of ridges are spaced apart from each other peripherally of said tubing.
Claim 6
Dependent Claim
20 words
A conduit according to claim 4 wherein: said tubing is generally cylindrical; and three series of said ridges are provided.
Claim 7
Dependent Claim
39 words
A conduit according to claim 5 wherein the ridges in said three series of ridges are arranged in spaced apart groups with each group comprising a central ridge and two side ridges disposed substantially parallel to said central ridge.
Claim 8
Dependent Claim
31 words
A conduit according to claim 6 wherein said side ridges are each spaced apart from said central ridge a distance within the range of from about 10* to about 80* .
Claim 9
Dependent Claim
25 words
A conduit according to claim 7 wherein each said opening in each said ridge comprises an elongated slot extending substantially the length of the ridge.
Claim 10
Dependent Claim
19 words
A conduit according to claim 1 wherein said ridges extend inwardly of said tubing from the inner surface thereof.
Claim 11
Dependent Claim
17 words
A conduit according to claim 9 wherein said spaced apart ridges are aligned longitudinally of said tubing.
Claim 12
Dependent Claim
34 words
A conduit according to claim 10 wherein a plurality of series of said ridges are provided in said tubing, and said series of ridges are spaced apart from each other peripherally of said tubing.
Claim 13
Dependent Claim
41 words
A conduit according to claim 11 wherein the ridges in said series of ridges are arranged in longitudinally spaced apart groups with each group comprising ridges which are substantially parallel with each other and are spaced apart peripherally of each other.
Claim 14
Dependent Claim
33 words
A conduit according to claim 12 wherein said tubing is generally cylindrical and said substantially parallel ridges are spaced apart a distance within the range of from about 10* to about 50* .
Claim 15
Dependent Claim
25 words
A conduit according to claim 13 wherein each said opening in each said ridge comprises an elongated slot extending substantially the length of the ridge.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-20 | 1977-02-19 | 1977-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-20 | 1981-02-19 | 1981-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-20 | 1985-02-19 | 1985-08-21 | $7700.00 | Window Closed / Lapsed |