US3616151A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plastic sheet having thickened margins and reinforced eyelets in margin areas
Assignee: ELLINIKI KIOMIHANIA PLASTIKON
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Filing: 1968-02-02
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Granted: 1971-10-26
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Expires: 1988-02-02
Abstract
Abstract A reinforced plastics sheet having integral anchorage points around its periphery and a method of manufacturing such a sheet by passing plastics material between recessed rolls.
Inventors
- 👤 Gabriel Racopoulos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:37
CPC Classifications
E; E04; E04H; E04H15/00; E04H15/32; E04H15/54; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24479; Y10T428/24488; Y10T428/24777
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
26 words
A sheet according to claim 1 in which each thickened region has a thickness at least 15 times that of the major part of the sheet.
Claim 2
Dependent Claim
136 words
A rectangular plastics sheet having a central zone which has a thickness between 0.05 mm. and 1 mm., a marginal zone extending around the periphery of the sheet, said marginal zone being thicker than said central zone, spaced transverse zones extending across said central zone and joining spaced points in said marginal zone, said transverse zones being thicker than said central zone, a corner zone at each corner of said sheet, said corner zones being thicker than said marginal zones, and isolated anchorage zones spaced around the periphery of said sheet in said marginal zone, each said anchorage zones being thicker than said corner zones and having a hole extending through it from one side of the sheet to the other, each said zone being integral and homogeneous with the other of said zones contiguous thereto.
Claim 3
Dependent Claim
23 words
A sheet according to claim 3 in which each anchorage zone has a thickness at least 15 times that of said central zonE.
Claim 4
Dependent Claim
89 words
A plastic sheet having isolated thickened regions spaced around at least part of the margin thereof, said thickened regions being integral and homogeneous with said sheet, and each said thickened region having a hole extending through it from one side of the sheet to the other, said sheet also having a marginal zone extending continuously around at least part of the periphery thereof, said zone being thicker than the major part of said sheet and thinner than said thickened regions, said thickened regions being located within said marginal zone.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-25 | 1975-04-26 | 1975-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-25 | 1979-04-26 | 1979-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-25 | 1983-04-26 | 1983-10-26 | $7700.00 | Window Closed / Lapsed |