Patent US3563843A successfully refreshed from Google Patents.
US3563843A
Expired / Lapsed
US
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Double-faced corrugated paperboard with sealed edges
Assignee: International Paper Co
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Filing: 1968-04-16
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Granted: 1971-02-16
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Expires: 1988-04-16
Abstract
Abstract A CLOSED EDGE CORRUGATED CORE PAPERBOARD IN WHICH THE CORRUGATED CORE OF THE BOARD IS CLOSED BY SLITTING AND COMPRESSING THE CORRUGATED CORE EDGE AND BY FOLDING THE EDGES OF THE FACING SHEETS, LEFT PROJECTING AFTER THE CORE IS CRUSHED, ONE FOLDED EXTENDING EDGE FOLDED OVER THE OTHER FOLDED EXTENDING EDGE, AND ADHESIVELY SECURING THE FOLDED EDGES TOGETHER; THE METHOD FOR PRODUCING SUCH BOARD INCLUDING THE STEPS OF SLITTING AND CRUSHING THE END OF THE CORE, FOLDING THE EDGES OF THE FACING SHEETS, ONE OVER THE OTHER, AND ADHESIVELY SECURING THE FOLDED EDGES OF THE FACING SHEETS TO EACH OTHER.
Inventors
- 👤 William O Wagers
- 👤 Robert H Frappier
- 👤 William S Mcdonald
- 👤 Charles L Boggs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:27
CPC Classifications
B; B31; B31F; B31F1/00; B31F1/20; B31F1/24; B31F1/26; B31F1/28; B31F1/2822; B31F1/2827; Y; Y10; Y10S; Y10S229/00; Y10S229/939; Y10T; Y10T428/00; Y10T428/24; Y10T428/2419; Y10T428/24628; Y10T428/24669; Y10T428/24694; Y10T428/24777; Y10T428/31504; Y10T428/31971; Y10T428/31975; Y10T428/31978; Y10T428/31982; Y10T428/31993
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) | 1974-02-15 | 1974-08-17 | 1975-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-15 | 1978-08-17 | 1979-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-15 | 1982-08-17 | 1983-02-16 | $7700.00 | Window Closed / Lapsed |