Patent US5375940A successfully refreshed from Google Patents.
US5375940A
Expired / Lapsed
US
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Water permeable landscape ditch cover
Assignee: Chubu Industries Inc
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Filing: 1993-02-09
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Granted: 1994-12-27
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Expires: 2013-02-09
Abstract
Abstract A water permeable landscape ditch cover comprising a monolithic body with a paved, water permeable surface comprised of a aggregate material and a synthetic resin binder.
Inventors
- 👤 Fumiki Kobayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 05:11
CPC Classifications
E; E01; E01C; E01C11/00; E01C11/22; E01C11/224; E01C11/225; E03; E03F; E03F5/00; E03F5/04; E03F5/06
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
102 words
A water permeable ditch cover comprising: a metal frame defined by side plates having top and bottom edges; a plurality of spaced beam members extending transversely between a pair of opposed side plates; the beam members having top surfaces spaced below the top ledges of each side plate; metal support means traversing the side plates and being disposed on the top surface of the beam members, the metal support means having a top side; and water permeable resin mortar paved smoothly across the top side of the metal support means, the mortar comprising a mixture of granular aggregate and synthetic resin binder.
Claim 2
Dependent Claim
102 words
A water permeable ditch cover comprising: a metal frame defined by side plates having top and bottom edges; a plurality of spaced beam members extending transversely between a pair of opposed side plates; the beam members having top surfaces spaced below the top ledges of each side plate; metal support means traversing the side plates and being disposed on the top surface of the beam members, the metal support means having a top side; and water permeable resin mortar paved smoothly across the top side of the metal support means, the mortar comprising a mixture of granular aggregate and synthetic resin binder.
Claim 3
Dependent Claim
16 words
The apparatus of claim 1 in which the metal support means comprises a punching metal sheet.
Claim 4
Dependent Claim
18 words
The apparatus of claim 1 in which the granular aggregate as about 1 to 8 mm in diameter.
Claim 5
Dependent Claim
45 words
The apparatus of claim 1 in which the aggregate is selected from the group consisting of gravel, blast furnace slug, broken stone, rubber chips, and urethane chips and the synthetic resin binder is selected from the group consisting of urethane, epoxy, polyester, and acrylic resin.
Claim 6
Dependent Claim
45 words
The apparatus of claim 3 in which the aggregate is selected from the group consisting of gravel, blast furnace slug, broken stone, rubber chips, and urethane chips and the synthetic resin binder is selected from the group consisting of urethane, epoxy, polyester, and acrylic resin.
Claim 7
Dependent Claim
34 words
The apparatus of claim 1 having at least one receptacle extending from the top of the metal support means, the receptacle defining a threaded passageway for receiving a tool for lifting the ditch cover.
Claim 8
Dependent Claim
34 words
The apparatus of claim 2 having at least one receptacle extending from the top of the metal support means, the receptacle defining a threaded passageway for receiving a tool for lifting the ditch cover.
Claim 9
Dependent Claim
34 words
The apparatus of claim 3 having at least one receptacle extending from the top of the metal support means, the receptacle defining a threaded passageway for receiving a tool for lifting the ditch cover.
Claim 10
Dependent Claim
17 words
The apparatus of claim 1 having adjusting means for adjusting the height of the metal support means.
Claim 11
Dependent Claim
17 words
The apparatus of claim 6 having adjusting means for adjusting the height of the metal support means.
Claim 12
Dependent Claim
34 words
The apparatus of claim 9 in which the adjusting means comprises a receptacle extending from the metal support means, the receptacle defining a threaded passageway, and a setting bolt adjustably screwed into the receptacle.
Claim 13
Dependent Claim
34 words
The apparatus of claim 10 in which the adjusting means comprises a receptacle extending from the metal support means, the receptacle defining a threaded passageway, and a setting bolt adjustably screwed into the receptacle.
Claim 14
Dependent Claim
17 words
The apparatus of claim 5 having adjusting means for adjusting the height of the metal support means.
Claim 15
Dependent Claim
34 words
The apparatus of claim 12 in which the adjusting means comprises a receptacle extending from the metal support means, the receptacle defining a threaded passageway, and a setting bolt adjustably screwed into the receptacle.
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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) | 1997-12-26 | 1998-06-27 | 1998-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-12-26 | 2002-06-27 | 2002-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-12-26 | 2006-06-27 | 2006-12-27 | $7700.00 | Window Closed / Lapsed |