US3623936A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Honeycomb core construction for panels
Assignee: United States Steel Corp
•
Filing: 1967-07-20
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Granted: 1971-11-30
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Expires: 1987-07-20
Abstract
Abstract A honeycomb core for fabricated metal panels. Core is formed of channels having openings which interfit with similar reversed channels. Facing sheets have face-to-face contact with webs of channels. Panel has continuous edge-to-edge passages both lengthwise and crosswise.
Inventors
- 👤 Peter Hotz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:08
CPC Classifications
E; E04; E04C; E04C2/00; E04C2/30; E04C2/34; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49616; Y10T29/4962; Y10T428/00; Y10T428/24; Y10T428/24149
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
15 words
A panel as defined in claim 1 having continuous lengthwise and crosswise passages extending edge-to-edge.
References Cited (Backward Citations)
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US1539397A
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US1908864A
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US2029679A
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US1999361A
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US2234517A
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US2960197A
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US3214212A
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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) | 1974-11-29 | 1975-05-31 | 1975-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-29 | 1979-05-31 | 1979-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-29 | 1983-05-31 | 1983-11-30 | $7700.00 | Window Closed / Lapsed |