Patent US3792809A successfully refreshed from Google Patents.
US3792809A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Disposable tray
Assignee: SWEETHEART PROPERTIES Inc
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Filing: 1971-10-29
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Granted: 1974-02-19
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Expires: 1991-10-29
Abstract
Abstract A light weight serving tray of inexpensive construction is suited particularly for disposable use. The tray is fabricated from a single sheet of material such as corrugated cardboard. Selected regions of the tray are scored and compressably deformed in a manner which insures that the peripheral margin of the tray will assume and maintain its upstanding, rail-like configuration.
Inventors
- 👤 D Schneider
- 👤 G Shumrak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 01:44
CPC Classifications
A; A47; A47G; A47G19/00; A47G19/02; A47G19/03; B; B65; B65D; B65D1/00; B65D1/34; Y; Y10; Y10S; Y10S229/00; Y10S229/93; Y10S229/939
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
142 words
A disposable tray formed from a continuous, integral sheet of corrugated cardboard with top and bottom layers and an intermediate scalloped layer, said tray comprising, a flat base portion defined by the interior regions of said sheet, the peripheral margin of said tray being bent upwardly at a juncture with said flat base portion to define an upturned rim fully about said tray said rim having a peripheral curved portion, a narrow region of said flat base portion of said tray extending along and adjacent the juncture of said flat base portion and said rim being compressably deformed to a thickness which is less than that of said flat base portion, said compressed narrow region enabling said rim to remain permanently at a substantial angle to said flat portion, and pleats in the top layer of said sheet at said curved portion.
Claim 2
Dependent Claim
142 words
A disposable tray formed from a continuous, integral sheet of corrugated cardboard with top and bottom layers and an intermediate scalloped layer, said tray comprising, a flat base portion defined by the interior regions of said sheet, the peripheral margin of said tray being bent upwardly at a juncture with said flat base portion to define an upturned rim fully about said tray said rim having a peripheral curved portion, a narrow region of said flat base portion of said tray extending along and adjacent the juncture of said flat base portion and said rim being compressably deformed to a thickness which is less than that of said flat base portion, said compressed narrow region enabling said rim to remain permanently at a substantial angle to said flat portion, and pleats in the top layer of said sheet at said curved portion.
Claim 3
Dependent Claim
22 words
A tray as defined in claim 1 further comprising: said rim being formed at its outer region to define a rolled edge.
Claim 4
Dependent Claim
72 words
A tray as defined in claim 1 further characterized by said rim having a plurality of peripheral curved portions forming corners of said tray, score lines in the top layer of the sheet at the peripheral margin and extending generally radially out from said juncture in the areas of the rim which are curved, and orderly pleats being formed in the top surface at said areas and extending into the scalloped layer.
Claim 5
Dependent Claim
42 words
A tray as defined in claim 3 further characterized by each of the score lines being generally V-shaped with the apex of the V lying at the juncture and the open end of the V lying at the edge of the rim.
Claim 6
Dependent Claim
40 words
A disposable tray as defined in claim 1 further characterized by, said rim being compressedly deformed to a thickness which is less than the thickness of said flat base portion but is greater than the thickness of said narrow region.
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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) | 1977-02-18 | 1977-08-20 | 1978-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-18 | 1981-08-20 | 1982-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-18 | 1985-08-20 | 1986-02-19 | $7700.00 | Window Closed / Lapsed |