US2700632A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a honeycomb sandwich
Assignee: Northrop Grumman Corp
•
Filing: 1949-09-09
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Granted: 1955-01-25
•
Expires: 1969-09-09
Abstract
No abstract record available.
Inventors
- 👤 Ackerlind Erik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:14
CPC Classifications
B; B32; B32B; B32B37/00; B64; B64C; B64C1/00; B64C1/06; B64C1/12; E; E04; E04C; E04C2/00; E04C2/30; E04C2/34; E04C2/36; E04C2/365; B64C2001/0054; B64C2001/0081; Y; Y10; Y10S; Y10S29/00; Y10S29/044; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1003; Y10T156/1025; Y10T156/1052; Y10T156/1056; Y10T156/1057; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49879; Y10T428/00; Y10T428/24; Y10T428/24149
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
128 words
THE METHOD OF FORMING A STRUCTURAL SANDWICH FROM A CORE HAVING A PLURALITY OF CELLS NORMALLY CLOSED BY THE APPLICATION OF TOP AND BOTTOM SKIN SHEETS TO THE EDGES OF SAID CELLS, WHICH COMPRISES CREATING AIR PASSAGES BETWEEN ALL OF THE CELLS OF SAID CORE INTERMEDIATE THE EDGES OF SAID CELLS, APPLYING A SKIN SHEET TO EACH SIDE OF SAID CORE WITH ADHESIVE THEREBETWEEN TEMPORARILY SEALING THE EDGES OF SAID SKIN SHEETS TO FORM AN AIRTIGHT INNER SPACE BETWEEN SAID SHEET IN WHICH SAID CELLS COMMUNICATE THROUGH SAID AIR PASSAGES EXHAUSTING GAS FROM THE INTERIOR OF SAID CELLS IN SAID SPACE THROUGH SAID AIR PASSAGES TO FORCE SAID SKIN SHEETS FIRMLY AGAINST SAID CELL EDGES, HEATING SAID SANDWISH TO CURE SAID ADHESIVE, AND REMOVING THE TEMPORARY EDGE SEAL.
Claim 2
Independent Claim
128 words
THE METHOD OF FORMING A STRUCTURAL SANDWICH FROM A CORE HAVING A PLURALITY OF CELLS NORMALLY CLOSED BY THE APPLICATION OF TOP AND BOTTOM SKIN SHEETS TO THE EDGES OF SAID CELLS, WHICH COMPRISES CREATING AIR PASSAGES BETWEEN ALL OF THE CELLS OF SAID CORE INTERMEDIATE THE EDGES OF SAID CELLS, APPLYING A SKIN SHEET TO EACH SIDE OF SAID CORE WITH ADHESIVE THEREBETWEEN TEMPORARILY SEALING THE EDGES OF SAID SKIN SHEETS TO FORM AN AIRTIGHT INNER SPACE BETWEEN SAID SHEET IN WHICH SAID CELLS COMMUNICATE THROUGH SAID AIR PASSAGES EXHAUSTING GAS FROM THE INTERIOR OF SAID CELLS IN SAID SPACE THROUGH SAID AIR PASSAGES TO FORCE SAID SKIN SHEETS FIRMLY AGAINST SAID CELL EDGES, HEATING SAID SANDWISH TO CURE SAID ADHESIVE, AND REMOVING THE TEMPORARY EDGE SEAL.
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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) | 1958-01-24 | 1958-07-26 | 1959-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-01-24 | 1962-07-26 | 1963-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-01-24 | 1966-07-26 | 1967-01-25 | $7700.00 | Window Closed / Lapsed |