Patent US3755031A successfully refreshed from Google Patents.
US3755031A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Panel and method of making it
Assignee: Meritor Inc
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Filing: 1971-10-13
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Granted: 1973-08-28
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Expires: 1991-10-13
Abstract
Abstract A panel construction and method of making it employing a flexible skin having a rigid block bonded thereto. A groove extends across said block with its apex terminating at said skin whereby said skin is foldable along the axis of said apex for forming the panel construction into the desired configuration.
Inventors
- 👤 F Hoffman
- 👤 M Buchanan
- 👤 C Dunbar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:03
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/12; B29; B29C; B29C44/00; B29C44/02; B29C44/12; B29C44/14; B32B3/00; B32B3/26; B32B3/30; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1039; Y10T156/1043; Y10T156/1049; Y10T156/1051; Y10T156/1089; Y10T156/1092; Y10T428/00; Y10T428/24; Y10T428/2419; Y10T428/24215; Y10T428/24479; Y10T428/2457; Y10T428/249921; Y10T428/249953; Y10T428/249987; Y10T428/249991; Y10T428/249992
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
16 words
The method as set forth in claim 1 in which said projection has a V-shaped cross-section.
Claim 2
Dependent Claim
45 words
The method as set forth in claim 1 in which said projection has a V-shaped cross-section, and said skin prior to the step of distending it into said cavity has a pair of V-shaped notches formed in its opposed edges in alignment with said projection.
Claim 3
Dependent Claim
43 words
The method as set forth in claim 1 in which said flexible plastic skin comprises a plastic lamina having a cloth lamina bonded thereto, and said skin is oriented on said die with the plastic lamina engaging the walls of the die cavity.
Claim 4
Dependent Claim
36 words
The method as set forth in claim 1 in which said flexible plastic skin has an adhesive applied to its resin engaging face prior to the step of injecting said resinous material into the distended skin.
Claim 5
Dependent Claim
37 words
The method as set forth in claim 1 in which said resinous material contains a blowing agent adapted to be activated during said curing step to cause said resinous material to cure into a rigid cellular block.
Claim 6
Dependent Claim
32 words
The method as set forth in claim 1 with the addition that said core has a plurality of ribs projecting into said resinous material and disposed out of contact with said skin.
Claim 7
Independent Claim
149 words
A method of making a panel construction comprising the steps of forming a pair of V-shaped notches in the opposed edges of a flexible skin, placing said skin on a die having a cavity formed therein, distending said skin into said cavity, injecting a fluid resinous material containing a blowing agent into said cavity into the distended skin, placing a core on said die, said core having at least one V-shaped projection extending across the distended skin in alignment with the notches in said skin and projecting through said resinous material to contact said skin, said skin having a plurality of ribs projecting into said resinous material and disposed out of contact with said skin, curing said resinous material while activating said blowing agent to form said resinous material into a rigid cellular block, and removing said core from the block and the finished panel construction from the cavity.
References Cited (Backward Citations)
US3649398A
Cited
US3654053A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-27 | 1977-02-26 | 1977-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-27 | 1981-02-26 | 1981-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-27 | 1985-02-26 | 1985-08-28 | $7700.00 | Window Closed / Lapsed |