US3080268A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lightweight structural panel and method of making the same
Assignee: AO Smith Corp
•
Filing: 1959-09-28
•
Granted: 1963-03-05
•
Expires: 1979-09-28
Abstract
No abstract record available.
Inventors
- 👤 Arvid J Bjork
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:43
CPC Classifications
E; E04; E04C; E04C2/00; E04C2/02; E04C2/10; E04C2/24; E04C2/243; B; B29; B29C; B29C70/00; B29C70/04; B29C70/06; B29C70/08; Y; Y10; Y10S; Y10S138/00; Y10S138/04; Y10S273/00; Y10S273/06; Y10S273/07; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1028; Y10T156/103; Y10T156/1089; Y10T428/00; Y10T428/24; Y10T428/24744
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
A LIGHTWEIGHT STRUCTURAL PANEL, COMPRISING A PAIR OF SPACED GENERALLY PARALLEL HOLLOW MEMBERS HAVING A GENERALLY CIRCULAR CROSS SECTION, A CELLULAR FLAT CORE DISPOSED EDGEWISE BETWEEN THE MEMBERS AND HAVING OPPOSITE RECESSED EDGES TO COMPLEMENT THE CONTOUR OF SAID MEMBERS, A STRAND OF SUBSTANTIALLY CONTINUOUS UNIDIRECTIONAL FIBERS DISPOSED CIRCUMFERENTIALLY AROUND THE MEMBERS AND CORE, AND A CURED THERMOSETTING RESIN BONDING THE STRAND TO THE MEMBERS AND CORE TO PROVIDE AN INTEGRAL STRUCTURE.
Claim 2
Dependent Claim
72 words
A LIGHTWEIGHT STRUCTURAL PANEL, COMPRISING A PAIR OF SPACED GENERALLY PARALLEL HOLLOW MEMBERS HAVING A GENERALLY CIRCULAR CROSS SECTION, A CELLULAR FLAT CORE DISPOSED EDGEWISE BETWEEN THE MEMBERS AND HAVING OPPOSITE RECESSED EDGES TO COMPLEMENT THE CONTOUR OF SAID MEMBERS, A STRAND OF SUBSTANTIALLY CONTINUOUS UNIDIRECTIONAL FIBERS DISPOSED CIRCUMFERENTIALLY AROUND THE MEMBERS AND CORE, AND A CURED THERMOSETTING RESIN BONDING THE STRAND TO THE MEMBERS AND CORE TO PROVIDE AN INTEGRAL STRUCTURE.
References Cited (Backward Citations)
US1801525A
Cited
US1852813A
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US2029048A
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US2339121A
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US2381631A
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US2454074A
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FR1009378A
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US2756464A
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US2880473A
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US2862650A
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US3020183A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-03-04 | 1966-09-03 | 1967-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-03-04 | 1970-09-03 | 1971-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-03-04 | 1974-09-03 | 1975-03-05 | $7700.00 | Window Closed / Lapsed |