US4296160A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of zoning grate surfaces
Assignee: Mateflex/Mele Corp
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Filing: 1980-01-07
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Granted: 1981-10-20
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Expires: 2000-01-07
Abstract
Abstract Disclosed is a method for delineating zones on the surface of thermoplastic gratings. The method comprises inserting in the grate openings a removable closure member adapted to interlock with the grating and close the opening. The removable closure member is distinguishable from the grating in color and when a plurality of closure members are so inserted in a pattern, they delineate a given zone.
Inventors
- 👤 Nicholas G. Forlenza
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:14
CPC Classifications
E; E01; E01C; E01C13/00; E01C13/04; E01C13/045; E01F; E01F9/00; E01F9/50; E01F9/553; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24149; Y10T428/24157; Y10T428/24273; Y10T428/24281; Y10T428/24289; Y10T428/24322; Y10T428/24331; Y10T428/24339; Y10T428/24628; Y10T428/24736
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
156 words
A method of delineating a zone on a surface of a thermoplastic grating, said grating comprising a molded thermoplastic sheet of a first color having an upper surface and a lower surface, a plurality of support legs on the lower surface and a plurality of square openings in the sheet communicating between upper and lower surfaces, the sheet portions between said square holes being bars defining the edges of adjacent holes, which comprises; inserting in those openings within said zone a removable closure member adapted to interlock with the grating and close the openings, said member having a second color which is visually distinguishable from the first color, said member comprising a cylinder having a first closed end and a second end, and expanded flange portions on each of said first and second ends, said flange portions flaring toward the mid-section of the cylinder shaped member, said interlocking occurring when the flanges frictionally engage the bars.
Claim 2
Independent Claim
156 words
A method of delineating a zone on a surface of a thermoplastic grating, said grating comprising a molded thermoplastic sheet of a first color having an upper surface and a lower surface, a plurality of support legs on the lower surface and a plurality of square openings in the sheet communicating between upper and lower surfaces, the sheet portions between said square holes being bars defining the edges of adjacent holes, which comprises; inserting in those openings within said zone a removable closure member adapted to interlock with the grating and close the openings, said member having a second color which is visually distinguishable from the first color, said member comprising a cylinder having a first closed end and a second end, and expanded flange portions on each of said first and second ends, said flange portions flaring toward the mid-section of the cylinder shaped member, said interlocking occurring when the flanges frictionally engage the bars.
Claim 3
Dependent Claim
145 words
A thermoplastic grating having a surface with delineated zones, which comprises; a molded thermoplastic sheet of a first color having an upper surface and a lower surface and a plurality of square openings in the sheet communicating between the upper and lower surfaces, the sheet portions between said square holes being bars defining the edges of the adjacent holes; and a plurality of removable closure members inserted and interlocked in those openings which are within the zone to be delineated, said members having a second color which is visually distinguishable from the first color, said member comprising a cylinder having a first closed end and a second end, and expanded flange portions on each of said first and second ends, said flange portions flaring toward the mid-section of the cylinder shaped member, said interlock being formed by frictional engagement of the flanges with the bars.
Claim 4
Dependent Claim
145 words
A thermoplastic grating having a surface with delineated zones, which comprises; a molded thermoplastic sheet of a first color having an upper surface and a lower surface and a plurality of square openings in the sheet communicating between the upper and lower surfaces, the sheet portions between said square holes being bars defining the edges of the adjacent holes; and a plurality of removable closure members inserted and interlocked in those openings which are within the zone to be delineated, said members having a second color which is visually distinguishable from the first color, said member comprising a cylinder having a first closed end and a second end, and expanded flange portions on each of said first and second ends, said flange portions flaring toward the mid-section of the cylinder shaped member, said interlock being formed by frictional engagement of the flanges with the bars.
Claim 5
Dependent Claim
22 words
The grating of claim 2 wherein said sheet is supported on a plurality of support legs integrally molded on the lower side.
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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) | 1984-10-19 | 1985-04-20 | 1985-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-10-19 | 1989-04-20 | 1989-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-10-19 | 1993-04-20 | 1993-10-20 | $7700.00 | Window Closed / Lapsed |