Patent US5841470A successfully refreshed from Google Patents.
Patent US4389138A successfully refreshed from Google Patents.
US4389138A
Expired / Lapsed
US
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Drain pipe
Assignee: Individual
•
Filing: 1979-12-03
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Granted: 1983-06-21
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Expires: 1999-12-03
Abstract
Abstract A drain pipe consisting of an outer pipe casing, which downwardly or on the lower surface is provided in the longitudinal direction with a recess, from which two partition walls extend upward and are connected at the upper end to the inside of the pipe casing via extensions of the partition walls resembling inclined roofs. In the inclined roof shaped extensions, which are connected in a line at the inside of the pipe casing, overflow openings are milled in a single operation.
Inventors
- 👤 Gert W. Soderstrom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 19:02
CPC Classifications
E; E02; E02B; E02B11/00; E02B11/005
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
87 words
A drain pipe, comprising an outer pipe casing, at least one longitudinal opening in a lower surface of the pipe casing, a wall extending upwardly from each longitudinal edge of the at least one opening to form between the walls a water riser space for drain water, a plurality of openings at an upper edge of each of the walls, the walls being connected to an upper inside surface of the pipe casing whereby water can flow into channels formed between the walls and the pipe casing.
Claim 2
Dependent Claim
87 words
A drain pipe, comprising an outer pipe casing, at least one longitudinal opening in a lower surface of the pipe casing, a wall extending upwardly from each longitudinal edge of the at least one opening to form between the walls a water riser space for drain water, a plurality of openings at an upper edge of each of the walls, the walls being connected to an upper inside surface of the pipe casing whereby water can flow into channels formed between the walls and the pipe casing.
Claim 3
Dependent Claim
83 words
A drain pipe as defined in claim 1, wherein the pipe casing comprises a longitudinal section with the at least one opening extending over the entire pipe casing length, the walls extending upwardly from the opening are terminated near an upper edge by portions resembling inclined roofs, said portions extending toward each other and being attached at the upper edge to the upper inside surface of the pipe casing, said inclined roof portions being provided with the plurality of openings for the water.
Claim 4
Dependent Claim
32 words
A drain pipe as defined in claim 2, wherein the walls are parallel, and the two portions resembling inclined roofs and terminating the walls have different angles in relation to the walls.
Claim 5
Dependent Claim
18 words
The drain pipe of claim 2 wherein the openings in both walls are formed in a single operation.
Claim 6
Dependent Claim
28 words
The drain pipe of claim 2 or 3 wherein the openings in one wall extend further downwardly toward the longitudinal opening than the openings in the other wall.
Claim 7
Dependent Claim
42 words
The drain pipe of claim 1 further comprising a support having two arms for supportively surrounding the casing, said support including barrier means both for maintaining the walls spaced from one another and for preventing longitudinal movement of water between the walls.
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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) | 1986-06-20 | 1986-12-20 | 1987-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-06-20 | 1990-12-20 | 1991-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-06-20 | 1994-12-20 | 1995-06-21 | $7700.00 | Window Closed / Lapsed |