Patent US7128797B2 successfully refreshed from Google Patents.
US7128797B2
Expired / Lapsed
US
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Dunnage platform
Assignee: Airdex Corp
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Filing: 2004-08-20
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Granted: 2006-10-31
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Expires: 2024-08-20
Abstract
Abstract A dunnage platform is in the general shape of a rectangular slab with legs extending form one side. The dunnage platform is made from an expanded polystyrene core. A chemical combination process is used to chemically combine portion of the core proximal to its surface with high impact polystyrene. In a first of two parts of the combination process, the core is placed in a forming mold with one of its two sides and two thirds of its thickness extending therefrom. A heated sheet of high impact polystyrene is brought into contact with the portion of the core extending from the mold. In a similar manner, the other of the two sides of the core is made to extend from the forming mold for contact with a heated sheet of high impact polystyrene.
Inventors
- 👤 Laurence W. Dummett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:55
CPC Classifications
B; B29; B29C; B29C44/00; B29C44/34; B29C44/56; B29C44/569; B32; B32B; B32B37/00; B32B37/14; B32B37/16; B32B37/18; B32B37/182; B32B37/185; B29C51/00; B29C51/12; B29C51/16; B32B38/00; B32B38/0036; B65; B65D; B65D19/00; B65D19/0004; B65D19/0006; B65D19/0008; B65D19/001; B65D19/0012; B65D19/0014; B65D19/0018; C; C08; C08J; C08J9/00; C08J9/36; C08J9/365; B29C2791/00; B29C2791/004; B29C2791/006; B29C51/08; B29C51/10; B29K; B29K2025/00; B29K2105/00; B29K2105/04; B29L; B29L2031/00; B29L2031/712; B29L2031/7178; B32B2553/00; B65D2519/00; B65D2519/00004; B65D2519/00009; B65D2519/00014; B65D2519/00034; B65D2519/00044; B65D2519/00049; B65D2519/00069; B65D2519/00079; B65D2519/00258; B65D2519/00263; B65D2519/00268; B65D2519/00283; B65D2519/00288; B65D2519/00313; B65D2519/00318; B65D2519/00328; B65D2519/00338; B65D2519/00398; B65D2519/00462; B65D2519/00547; B65D2519/00552; B65D2519/00557; B65D2519/00736; B65D2519/0086; C08J2325/00; C08J2325/02; C08J2325/04; C08J2325/06; C08J2425/00; Y; Y10; Y10S; Y10S108/00; Y10S108/901; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1007; Y10T156/1008; Y10T156/1011; Y10T156/1028; Y10T156/103; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/1376; Y10T428/23; Y10T428/233; Y10T428/239; Y10T428/249921; Y10T428/249953; Y10T428/249955; Y10T428/249958
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
131 words
A process for making a strengthened polystyrene load bearing structure, comprising the steps of: providing a forming mold adapted to hold an expanded polystyrene core; retaining said expanded polystyrene core within the mold with a first side of the core and at least half the thickness of the core extend therefrom; heating a first high impact polystyrene sheet; and chemically combining the first sheet with the first side of the core, wherein portions of said core that extend from said mold contact said sheet; removing the core from the mold and reinserting the core in the mold, wherein a second side of the core and at least half the thickness of the core extend therefrom; heating a second high impact polystyrene sheet; and substantially surrounding the core with the second sheet.
Claim 2
Dependent Claim
131 words
A process for making a strengthened polystyrene load bearing structure, comprising the steps of: providing a forming mold adapted to hold an expanded polystyrene core; retaining said expanded polystyrene core within the mold with a first side of the core and at least half the thickness of the core extend therefrom; heating a first high impact polystyrene sheet; and chemically combining the first sheet with the first side of the core, wherein portions of said core that extend from said mold contact said sheet; removing the core from the mold and reinserting the core in the mold, wherein a second side of the core and at least half the thickness of the core extend therefrom; heating a second high impact polystyrene sheet; and substantially surrounding the core with the second sheet.
Claim 3
Dependent Claim
19 words
The process of claim 1 , wherein the expanded polystyrene core is surrounded with the high impact polystyrene sheets.
Claim 4
Dependent Claim
20 words
The process of claim 1 , wherein the expanded polystyrene core is chemically combined with the high impact polystyrene sheets.
Claim 5
Dependent Claim
40 words
The process of claim 1 , further comprising the steps of: placing an expanded polystyrene core in proximity of the high impact polystyrene sheets; and applying reduced pressure to mold the heated high impact polystyrene sheet to the expanded core.
Claim 6
Dependent Claim
48 words
The process of claim 1 , further comprising the steps of: placing an expanded polystyrene core in proximity of the high impact polystyrene sheets; and moving said core into contact with said heated high impact polystyrene sheet; wherein said heated high impact polystyrene sheet remains fixed in position.
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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) | 2009-10-30 | 2010-05-01 | 2010-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2013-10-30 | 2014-05-01 | 2014-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2017-10-30 | 2018-05-01 | 2018-10-31 | $7700.00 | Window Closed / Lapsed |