Patent US4240557A successfully refreshed from Google Patents.
US4240557A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polystyrene foam structure
Assignee: Mead Corp
•
Filing: 1978-12-28
•
Granted: 1980-12-23
•
Expires: 1998-12-28
Abstract
Abstract A molded polystyrene foam wedge-shaped merchandise support with a plurality of reinforcing ribs with at least one transfer hole in each rib. The top, edges and sides of the support may be covered by a protective covering. The protective covering may be a thermoplastic sheet, such as an acrylonitrile-butadiene-styrene polymer, or a laminated fiberboard.
Inventors
- 👤 Luther I. Dickens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:36
CPC Classifications
A; A47; A47B; A47B96/00; A47B96/02; A47B96/021; B; B29; B29C; B29C44/00; B29C44/02; B29C44/12; B65; B65D; B65D81/00; B65D81/02; B65D81/05; B65D81/107; B29C44/14; Y; Y10; Y10S; Y10S108/00; Y10S108/901
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
146 words
A molded merchandise support constructed from polystyrene foam having a flat top, a thick edge, a thin edge, two sides interconnecting the two edges, and a bottom, said flat top and thick edge having at least a substantial portion of the surface covered by a protective covering bonded to the polystyrene foam, said support having a plurality of ribs for reinforcing the support in spaced relationship to each other, each rib having a depth at least equal to a major portion of the distance between the top and bottom and having a length so as to traverse at least a major portion of the distance between the thick and thin edges, each rib having at least one transfer hole filled with polystyrene foam, said transfer holes permitting the polystyrene to be transferred throughout the support during molding so the density of the support is fairly uniform.
Claim 2
Dependent Claim
146 words
A molded merchandise support constructed from polystyrene foam having a flat top, a thick edge, a thin edge, two sides interconnecting the two edges, and a bottom, said flat top and thick edge having at least a substantial portion of the surface covered by a protective covering bonded to the polystyrene foam, said support having a plurality of ribs for reinforcing the support in spaced relationship to each other, each rib having a depth at least equal to a major portion of the distance between the top and bottom and having a length so as to traverse at least a major portion of the distance between the thick and thin edges, each rib having at least one transfer hole filled with polystyrene foam, said transfer holes permitting the polystyrene to be transferred throughout the support during molding so the density of the support is fairly uniform.
Claim 3
Dependent Claim
25 words
The molded merchandise support of claim 1 in which the bottom has spaced cavities in rows and the reinforcing ribs are located between these rows.
Claim 4
Dependent Claim
16 words
The molded merchandising support of claim 1 in which the protective covering is a thermoplastic sheet.
Claim 5
Dependent Claim
40 words
The molded merchandise support of claim 1 in which the protective covering is an acrylonitrile-butadiene-styrene polymer thermoplastic sheet, and in which a bumper plate has been interposed between the polystyrene foam at the thick edge and the adjoining thermoplastic sheet.
Claim 6
Dependent Claim
16 words
The molded merchandise support of claim 1 in which the protective covering is a laminated fiberboard.
Claim 7
Dependent Claim
25 words
The molded merchandise support of claim 5 in which the bottom has spaced cavities in rows and the reinforcing ribs are located between these rows.
References Cited (Backward Citations)
US2361438A
Cited
US3119129A
Cited
US3511191A
Cited
US3546841A
Cited
US3604748A
Cited
US3719157A
Cited
US3915098A
Cited
US3939987A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-12-23 | 1984-06-23 | 1984-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-23 | 1988-06-23 | 1988-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-23 | 1992-06-23 | 1992-12-23 | $7700.00 | Window Closed / Lapsed |