US3691002A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Impregnated corrugated board
Assignee: Individual
•
Filing: 1970-10-23
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Granted: 1972-09-12
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Expires: 1990-10-23
Abstract
Abstract A SHEET OF PAPER BOARD COMPRISED OF SPACEDLY OPPOSED FACING SHEETS AND A CORRUGATED MEMBER INTERMEDIATE THE FACING SHEETS IS SATURATED WITH A RESIN WHICH COATS THE CORRUGATED MEMBER ANS ALSO FILLS THE CORNERS AT THE BONDED JUNCTURES OF THE FACING SHEETS AND THE CORRUGATED MEMBER. THE METHOD OF THIS INVENTION COMPRISES THE STEPS OF FORCING RESIN INTO THE INTERIOR FLUTES OF THE FORMED PAPER BOARD SHEET AND THEN ROTATING THE SHEET SLOWLY ABOUT THE LONGITUDINAL AXIS OF THE CORRUGATIONS.
Inventors
- 👤 William Blandy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:00
CPC Classifications
B; B65; B65D; B65D65/00; B65D65/38; B65D65/40; B65D65/403; B31; B31F; B31F1/00; B31F1/20; B31F1/24; B31F1/26; B31F1/28; B31F1/2804; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1025; Y10T428/00; Y10T428/24; Y10T428/24628; Y10T428/24669; Y10T428/24694; Y10T428/24711; Y10T428/24727
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) | 1975-09-12 | 1976-03-13 | 1976-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-12 | 1980-03-13 | 1980-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-12 | 1984-03-13 | 1984-09-12 | $7700.00 | Window Closed / Lapsed |