US3552086A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sandwich structural panel of cellular core type
Assignee: Stanray Corp
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Filing: 1967-04-07
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Granted: 1971-01-05
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Expires: 1987-04-07
Abstract
Abstract A SANDWICH STRUCTURAL PANEL OF CELLULAR CORE TYPE WHEREIN INTEGRAL TONGUES OR TABS ARE SPACED ALONG THE EDGES OF THE CORE MATERIAL WHICH REGISTER WITH AND PROJECT THROUGH SLOTS IN SKIN SHEETS OF THE PANEL AND ARE FOLDED THERECOVER TO HOLD THE SKIN SHEETS TO THE CORE MATERIAL.
Inventors
- 👤 John W Allen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:35
CPC Classifications
E; E04; E04C; E04C2/00; E04C2/30; E04C2/34; E04C2/36; E04C2/365; E04C2/42; E04C2/421; E04C2/426; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49908; Y10T29/49915; Y10T29/49922; Y10T428/00; Y10T428/24; Y10T428/24479; Y10T428/24496
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |