US2839442A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of making a lightweight structural panel
Assignee: AO Smith Corp
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Filing: 1955-02-23
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Granted: 1958-06-17
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Expires: 1975-02-23
Abstract
No abstract record available.
Inventors
- 👤 Robert W Whitaker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:13
CPC Classifications
B; B29; B29C; B29C43/00; B29C43/32; B29C43/36; B29C43/42; B29C33/00; B29C33/02; B29C70/00; B29C70/68; B29C70/86; B29C70/865; B29D; B29D24/00; B29D24/002; B29D24/005; E; E04; E04C; E04C2/00; E04C2/30; E04C2/34; E04C2/36; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1028; Y10T156/103; Y10T428/00; Y10T428/23; Y10T428/234; Y10T428/236; Y10T428/24; Y10T428/24149; Y10T428/249921; Y10T428/249953; Y10T428/249962; Y10T428/249964; Y10T428/249981; Y10T428/249987; Y10T428/249991; Y10T428/249992; Y10T428/31
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
129 words
A PROCESS FOR MAKING A STRUCTURAL PANEL HAVING AN OPEN CELL CORE AND A FIBER REINFORCED FACING MATERIAL EXTENDING CONTINUOUSLY OVER THE CORE, WHICH COMPRISES THE STEPS OF ASSEMBLING AN EDGING MATERIAL ALONG THE EDGES OF THE CORE, APPLYING A THIN FILM OF A LIQUID UNCURED RESIN TO A FACE OF SAID CORE AND THE CORRESPONDING FACE OF THE EDGING MATERIAL, CURING THE RESIN FILM TO SEAL THE CELLS OF THE CORE AND SEAL THE JOINT BETWEEN THE CORE AND THE EDGING MATERIAL, APPLYING A QUANTITY OF LIQUID UNCURED RESIN AND A LAYER OF FIBER REINFORCEMENT TO THE FACE OF THE CORE AND TO THE CORRESPONDING FACE OF THE EDGING MATERIAL, CURING SAID SECOND NAMED RESIN TO BOND THE REINFORCEMENT TO THE CORE AND PROVIDE A LIGHTWEIGHT STRONG PANEL.
Claim 2
Dependent Claim
129 words
A PROCESS FOR MAKING A STRUCTURAL PANEL HAVING AN OPEN CELL CORE AND A FIBER REINFORCED FACING MATERIAL EXTENDING CONTINUOUSLY OVER THE CORE, WHICH COMPRISES THE STEPS OF ASSEMBLING AN EDGING MATERIAL ALONG THE EDGES OF THE CORE, APPLYING A THIN FILM OF A LIQUID UNCURED RESIN TO A FACE OF SAID CORE AND THE CORRESPONDING FACE OF THE EDGING MATERIAL, CURING THE RESIN FILM TO SEAL THE CELLS OF THE CORE AND SEAL THE JOINT BETWEEN THE CORE AND THE EDGING MATERIAL, APPLYING A QUANTITY OF LIQUID UNCURED RESIN AND A LAYER OF FIBER REINFORCEMENT TO THE FACE OF THE CORE AND TO THE CORRESPONDING FACE OF THE EDGING MATERIAL, CURING SAID SECOND NAMED RESIN TO BOND THE REINFORCEMENT TO THE CORE AND PROVIDE A LIGHTWEIGHT STRONG PANEL.
References Cited (Backward Citations)
US2029048A
Cited
GB613529A
Cited
US2518164A
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US2538776A
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US2556011A
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US2622999A
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US2608500A
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US2700634A
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US2606598A
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US2688579A
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US2663527A
Cited
US2719809A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-16 | 1961-12-16 | 1962-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-16 | 1965-12-16 | 1966-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-16 | 1969-12-16 | 1970-06-17 | $7700.00 | Window Closed / Lapsed |