US3837560A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Expanded polystyrene partition structure and method of making thereof
Assignee: Cutting Equipment Leasing Inc
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Filing: 1972-05-18
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Granted: 1974-09-24
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Expires: 1992-05-18
Abstract
Abstract A partition structure for shipping or storage containers having a plurality of interfitting partition strips with interlocking slots and with the partition strips being formed of expanded polystyrene. In one form thereof, the planar faces of a partition strip have a relatively low density because of said surfaces being formed by saw cut from a block of expanded polystyrene, while the entire peripheral edge of the partition strip, including the interlocking slots, are formed by hot wire cutting to have a higher density on the surface thereof to provide greater physical strength for the partition strip.
Inventors
- 👤 L Kuchuris
- 👤 S Gembicki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:10
CPC Classifications
B; B26; B26D; B26D3/00; B26D3/006; B65; B65D; B65D5/00; B65D5/42; B65D5/44; B65D5/48; B65D5/48024; B65D5/48026; B65D5/48038; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24149
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
104 words
A partition strip for interlocking relation with other such strips to form a partition structure usable in a shipping or storage container comprising a generally planar integral body of expanded polystyrene material with a series of slots extending for part of the height thereof for interlock with other partition strips, the generally planar faces of said body having a relative low density for cushioning contact with a product and the edges of said strip including the surfaces of said slots being partially melted in shaping thereof to have a substantially uniform higher density and being in tension for adding structural strength to the strip.
Claim 2
Dependent Claim
104 words
A partition strip for interlocking relation with other such strips to form a partition structure usable in a shipping or storage container comprising a generally planar integral body of expanded polystyrene material with a series of slots extending for part of the height thereof for interlock with other partition strips, the generally planar faces of said body having a relative low density for cushioning contact with a product and the edges of said strip including the surfaces of said slots being partially melted in shaping thereof to have a substantially uniform higher density and being in tension for adding structural strength to the strip.
References Cited (Backward Citations)
US3190943A
Cited
US3431164A
Cited
GB1066615A
Cited
US3383027A
Cited
US3342365A
Cited
US3404827A
Cited
US3565243A
Cited
US3564811A
Cited
US3667159A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-23 | 1978-03-25 | 1978-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-23 | 1982-03-25 | 1982-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-23 | 1986-03-25 | 1986-09-24 | $7700.00 | Window Closed / Lapsed |