US3846945A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Duckboard fatigue relief mat
Assignee: Rubbermaid Commercial Products LLC
•
Filing: 1972-10-02
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Granted: 1974-11-12
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Expires: 1992-10-02
Abstract
Abstract A duckboard mat designed to give fatigue relief when supported on an existing floor has floor engaging ribs on its underside and an upper wearing surface with openings therein. A plurality of tongues extending laterally from one side of the mat have projections thereon and a plurality of staggered tongues extending laterally from the other side have recesses therein, whereby interlocking connections may be made with like mats.
Inventors
- 👤 M Roby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:20
CPC Classifications
E; E04; E04F; E04F15/00; E04F15/02; E04F15/10; E04F15/02172
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
85 words
A resilient duckboard fatigue relief mat module having a network of intersecting longitudinal and lateral major floorengaging ribs on its underside, an upper wearing surface having openings therein, and a plurality of tongues projecting laterally from opposite sides and each having downwardly inclined top walls and floor-engaging side walls, said side walls having projections and recesses for interlocking connection with projections and recesses on the side walls of like tongues of adjoining like modules, and skid resistant strips attached to certain of said major ribs.
Claim 2
Dependent Claim
85 words
A resilient duckboard fatigue relief mat module having a network of intersecting longitudinal and lateral major floorengaging ribs on its underside, an upper wearing surface having openings therein, and a plurality of tongues projecting laterally from opposite sides and each having downwardly inclined top walls and floor-engaging side walls, said side walls having projections and recesses for interlocking connection with projections and recesses on the side walls of like tongues of adjoining like modules, and skid resistant strips attached to certain of said major ribs.
Claim 3
Dependent Claim
38 words
A duckboard mat as set forth in claim 1, wherein each of said skid resistant strips has a body portion and a base portion and said body portion has a longitudinally extending groove to receive said major rib.
Claim 4
Dependent Claim
20 words
A duckboard mat as set forth in claim 1, wherin said groove has barbs which frictionally engage said major rib.
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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) | 1977-11-11 | 1978-05-13 | 1978-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-11 | 1982-05-13 | 1982-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-11 | 1986-05-13 | 1986-11-12 | $7700.00 | Window Closed / Lapsed |