US3235040A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sandwich panel structure with edge trim
Assignee: Dow Chemical Co
•
Filing: 1963-05-03
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Granted: 1966-02-15
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Expires: 1983-05-03
Abstract
No abstract record available.
Inventors
- 👤 John T Ellis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:22
CPC Classifications
E; E04; E04C; E04C2/00; E04C2/02; E04C2/26; E04C2/284; E04C2/292; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24777
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
128 words
A SANDWICH PANEL STRUCTURE COMPRISING A PAIR OF SPACED APART PARALLEL SKIN SHEETS FACING EACH OTHER AND A CORE BRIDGING BETWEEN AND ATTACHED TO THE INSIDE FACES OF THE SHEETS TO HOLD THEM TOGETHER AS A UNITARY STRUCTURE, SAID CORE STOPPING SHORT OF THE EDGES OF SAID SHEETS THEREBY FORMING A RECESS BETWEEN THE INSIDE FACES OF SAID SKIN SHEETS ALONG THE EDGES OF SAID SHEETS, A C-SHAPED CROSSSECTION RETAINER LODGED IN SAID RECESS, THE SIDES OF SAID RETAINER SECURED TO THE INSIDE SURFACES OF SAID SKIN SHEETS, THE OPEN PORTION OF SAID RETAINER, EXTENDING OUTWARDLY TOWARDS THE OUTER EDGE OF SAID SKIN SHEETS AND AN EDGE TRIM MEMBER, THE ENDS OF SAID EDGE TRIM MEMBER IN SNAP ENGAGEMENT WITH THE OUTWARDLY EXTENDING ENDS OF SAID C-SHAPED RETAINER.
Claim 2
Dependent Claim
128 words
A SANDWICH PANEL STRUCTURE COMPRISING A PAIR OF SPACED APART PARALLEL SKIN SHEETS FACING EACH OTHER AND A CORE BRIDGING BETWEEN AND ATTACHED TO THE INSIDE FACES OF THE SHEETS TO HOLD THEM TOGETHER AS A UNITARY STRUCTURE, SAID CORE STOPPING SHORT OF THE EDGES OF SAID SHEETS THEREBY FORMING A RECESS BETWEEN THE INSIDE FACES OF SAID SKIN SHEETS ALONG THE EDGES OF SAID SHEETS, A C-SHAPED CROSSSECTION RETAINER LODGED IN SAID RECESS, THE SIDES OF SAID RETAINER SECURED TO THE INSIDE SURFACES OF SAID SKIN SHEETS, THE OPEN PORTION OF SAID RETAINER, EXTENDING OUTWARDLY TOWARDS THE OUTER EDGE OF SAID SKIN SHEETS AND AN EDGE TRIM MEMBER, THE ENDS OF SAID EDGE TRIM MEMBER IN SNAP ENGAGEMENT WITH THE OUTWARDLY EXTENDING ENDS OF SAID C-SHAPED RETAINER.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-02-14 | 1969-08-16 | 1970-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-14 | 1973-08-16 | 1974-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-14 | 1977-08-16 | 1978-02-15 | $7700.00 | Window Closed / Lapsed |