Patent US3677868A successfully refreshed from Google Patents.
US3677868A
Expired / Lapsed
US
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Laminated board structure and method of making same
Assignee: International Paper Co
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Filing: 1969-11-24
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Granted: 1972-07-18
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Expires: 1989-11-24
Abstract
Abstract A RESIN IMPREGNATED, RESIN CURABLE FIBER MAT, AND A METHOD FOR USING THE MAT AS A DIMENSIONAL STABILIZING ELEMENT IN A LAMINATE STRUCTURE, WHICH IS PARTIALLY CURED PRIOR TO USE IN THE LAMINATE STRUCTURE AND IS FULLY POLYMERIZED BY THE ADDITION OF SUITABLE RESIN WHEN THE MAT IS TO BE USED.
Inventors
- 👤 Charles L Boggs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:43
CPC Classifications
B; B27; B27D; B27D1/00; B32; B32B; B32B21/00; B32B21/10; B32B21/14; B32B2260/00; B32B2260/02; B32B2260/021; B32B2260/04; B32B2260/046; B32B2262/00; B32B2262/06; B32B2262/062; Y; Y10; Y10T; Y10T428/00; Y10T428/18; Y10T428/183; Y10T428/187; Y10T428/24; Y10T428/24355; Y10T428/24752; Y10T428/24769; Y10T428/31504; Y10T428/31942; Y10T428/31949; Y10T428/31957
Claims Analysis
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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) | 1975-07-18 | 1976-01-17 | 1976-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-18 | 1980-01-17 | 1980-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-18 | 1984-01-17 | 1984-07-18 | $7700.00 | Window Closed / Lapsed |