US3959050A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plaque board with polyurethane core and method for construction same
Assignee: Individual
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Filing: 1974-07-15
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Granted: 1975-05-25
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Expires: 1994-07-15
Abstract
Abstract A plague board comprises a solid polyurethane core enclosed by a high grade wood which forms all exterior surfaces thereof. A wooden frame is secured between the peripheries of a pair of spaced panels formed of flat sheets of veneer. The polyurethane core fills the interior of the frame between the veneer panels and is firmly bonded to the wooden frame and veneer. A method disclosed for constructing the plaque board and other like articles comprises inserting a measured amount of liquid polyurethane foam in the interior space between the attached frame and panels and pressing the opposite veneer panels inwardly as the polyurethane expands outwardly to solidify and become bonded to the frame and panels.
Inventors
- 👤 William A. Hooper, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:28
CPC Classifications
B; B32; B32B; B32B21/00; B32B21/04; B32B21/047; E; E04; E04C; E04C2/00; E04C2/02; E04C2/10; E04C2/24; E04C2/243; B32B21/14; B32B3/00; B32B3/02; B32B3/04; E04C2/30; E04C2/38; E04C2/386; B32B38/00; B32B2038/0052; B32B2038/0088; B32B2266/00; B32B2266/02; B32B2266/0214; B32B2266/0278; B32B2479/00; Y; Y10; Y10T; Y10T428/00; Y10T428/16; Y10T428/161; Y10T428/249921; Y10T428/249953; Y10T428/249987
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
282 words
A method of constructing a unitary article, such as a plaque board, having only wooden surfaces exposed, said method comprising the steps of: providing first and second wooden veneer sheets; constructing a continuous, endless, all wooden frame having an open interior completely bounded by said frame, said frame having a preselected shape and an exposed exterior surface extending continuously thereon, said exterior surface including first and second portions joined together in angled relation; securing said frame directly against said first veneer sheet to locate said first veneer sheet in position to close one side of said frame interior and to locate said frame in position to form a continuous peripheral border having said first and second surface portions exposed; inserting a liquid foam substance within said frame interior and against said first veneer sheet, said foam substance being adapted to expand, solidify, and become bonded directly to said veneer sheets and frame; securing said second veneer sheet directly to said frame in spaced relation from said first veneer sheet after the insertion of said foam substance but prior to the completion of the expansion and solidification of said foam substance, said second veneer sheet thereby closing the other side of said frame interior to cooperate with said first veneer sheet and frame to completely enclose said foam substance within said frame interior; and pressing and holding said first and second veneer sheets tightly against said frame as said foam substance expands to fill said frame interior and press outwardly directly against said veneer sheets and frame, whereby said foam substance becomes bonded to said veneer sheets and frame as it solidifies to form a rigid core completely internally of said frame interior.
Claim 2
Independent Claim
282 words
A method of constructing a unitary article, such as a plaque board, having only wooden surfaces exposed, said method comprising the steps of: providing first and second wooden veneer sheets; constructing a continuous, endless, all wooden frame having an open interior completely bounded by said frame, said frame having a preselected shape and an exposed exterior surface extending continuously thereon, said exterior surface including first and second portions joined together in angled relation; securing said frame directly against said first veneer sheet to locate said first veneer sheet in position to close one side of said frame interior and to locate said frame in position to form a continuous peripheral border having said first and second surface portions exposed; inserting a liquid foam substance within said frame interior and against said first veneer sheet, said foam substance being adapted to expand, solidify, and become bonded directly to said veneer sheets and frame; securing said second veneer sheet directly to said frame in spaced relation from said first veneer sheet after the insertion of said foam substance but prior to the completion of the expansion and solidification of said foam substance, said second veneer sheet thereby closing the other side of said frame interior to cooperate with said first veneer sheet and frame to completely enclose said foam substance within said frame interior; and pressing and holding said first and second veneer sheets tightly against said frame as said foam substance expands to fill said frame interior and press outwardly directly against said veneer sheets and frame, whereby said foam substance becomes bonded to said veneer sheets and frame as it solidifies to form a rigid core completely internally of said frame interior.
References Cited (Backward Citations)
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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) | 1978-05-24 | 1978-11-23 | 1979-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-24 | 1982-11-23 | 1983-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-24 | 1986-11-23 | 1987-05-25 | $7700.00 | Window Closed / Lapsed |