US3563445A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plastic tray structures
Assignee: Mobil Oil AS
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Filing: 1968-09-11
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Granted: 1971-02-16
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Expires: 1988-09-11
Abstract
Abstract A thermoplastic tray characterized by having a series of valleys and ridges arranged on the surface thereof in a herringbone-type pattern. The depth and width of the valleys and ridges, the longitudinal extent thereof, and the angular relationship of rib segments are substantially uniform and selected to achieve maximum tray rigidity in the longitudinal, transverse and diagonal directions of the tray structure.
Inventors
- 👤 William J Clayton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:48
CPC Classifications
B; B65; B65D; B65D81/00; B65D81/24; B65D81/26; B65D81/261; B65D81/262
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
71 words
A thermoplastic tray comprising an internal bottom surface with upstanding side and end wall members integrally joined thereto, a series of substantially parallel, elongated, spaced apart ribs extending upwardly from said bottom surface, each of said ribs comprising a plurality of integrally joined segments forming a herringbone configuration, each of said segments being segments disposed at an angle of from about 60* to about 120* in relationship with its adjacent segment.
Claim 2
Dependent Claim
71 words
A thermoplastic tray comprising an internal bottom surface with upstanding side and end wall members integrally joined thereto, a series of substantially parallel, elongated, spaced apart ribs extending upwardly from said bottom surface, each of said ribs comprising a plurality of integrally joined segments forming a herringbone configuration, each of said segments being segments disposed at an angle of from about 60* to about 120* in relationship with its adjacent segment.
Claim 3
Dependent Claim
42 words
A thermoplastic meat tray in accordance with claim 1 wherein said rib segments which are adjacent to said sidewall members extend upwardly in a vertical direction into said sidewall members to a height intermediate the lower and upper margin of said sidewalls.
Claim 4
Dependent Claim
61 words
A thermoplastic meat tray in accordance with claim 1 wherein said ribs are spaced apart a distance of from about 0.12 inch to about 2 inches, said rib segments being approximately one to 2 1/2 inches long, said rib segments joining adjacent segments at an angle of about 90* and said rib segments being at least two thirty-seconds inch in height.
Claim 5
Dependent Claim
13 words
A thermoplastic tray in accordance with claim 1 wherein said thermoplastic is transparent.
Claim 6
Dependent Claim
25 words
A packaged food product comprising a tray, as described in claim 1, and a food product supported on the inner surface of the tray bottom.
References Cited (Backward Citations)
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US3151799A
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US3253762A
Cited
US3261531A
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US3357593A
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US3420431A
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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) | 1974-02-15 | 1974-08-17 | 1975-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-15 | 1978-08-17 | 1979-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-15 | 1982-08-17 | 1983-02-16 | $7700.00 | Window Closed / Lapsed |