Patent US2239093A successfully refreshed from Google Patents.
Patent USH1481H successfully refreshed from Google Patents.
USH1481H
Expired / Lapsed
US
⏱️ 0.0 years remaining
Offset corrugated sandwich construction
Assignee: United States Department of the Navy
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Filing: 1993-06-23
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Granted: 1995-09-05
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Expires: 2013-06-23
Abstract
Abstract A sandwich construction is disclosed that provides alternating offset and jacent corrugated strips secured between upper and lower face sheets. The peaks of one strip are adjacent the troughs of an adjacent strip. The peaks and troughs can have flattened portions and the face sheets can be secured to said portions.
Inventors
- 👤 Hemen Ray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:38
CPC Classifications
B; B32; B32B; B32B3/00; B32B3/26; B32B3/28; B31; B31D; B31D3/00; B31D3/005; B32B2250/00; B32B2250/40
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
41 words
A sandwich construction comprising: offset corrugated means having a plurality of substantially parallel cells, each cell being formed by alternating peaks and troughs and having moisture communication with each other adjacent cell; and face sheet means secured to opposite sides thereof.
Claim 2
Dependent Claim
41 words
A sandwich construction comprising: offset corrugated means having a plurality of substantially parallel cells, each cell being formed by alternating peaks and troughs and having moisture communication with each other adjacent cell; and face sheet means secured to opposite sides thereof.
Claim 3
Dependent Claim
15 words
A sandwich construction as described in claim 1 wherein each said peak is substantially flat.
Claim 4
Dependent Claim
15 words
A sandwich construction as described in claim 2 wherein each said trough is substantially flat.
Claim 5
Dependent Claim
26 words
A sandwich construction as described in claim 3 wherein said face sheet means is attached to the offset corrugated means at the flat peaks and troughs.
Claim 6
Dependent Claim
36 words
A sandwich construction comprising: adjacent corrugated strips arranged to have peaks of a first strip substantially next to troughs of a second strip to form an offset pattern; and upper and lower face sheets secured thereto.
Claim 7
Dependent Claim
36 words
A sandwich construction comprising: adjacent corrugated strips arranged to have peaks of a first strip substantially next to troughs of a second strip to form an offset pattern; and upper and lower face sheets secured thereto.
Claim 8
Dependent Claim
17 words
A sandwich construction as described in claim 5 wherein said corrugated strips are substantially one-half inch wide.
References Cited (Backward Citations)
US3542636A
Cited
US3574103A
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US4472473A
Cited
US4769968A
Cited
US5028474A
Cited
US5162143A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-09-04 | 1999-03-06 | 1999-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-09-04 | 2003-03-06 | 2003-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-09-04 | 2007-03-06 | 2007-09-05 | $7700.00 | Window Closed / Lapsed |