US3689347A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method in the manufacture of boards of fibrous or/and plastic material
Assignee: Valmet AB
•
Filing: 1968-06-18
•
Granted: 1972-09-05
•
Expires: 1988-06-18
Abstract
Abstract A MEANS AND METHOD FOR MAKING BOARD COMPOSED OF FIBERS, SYNTHETIC RESINS AND MIXTURES THEREOF BY PRESSING THE MATERIAL IN A HOT PRESS INCLUDING A GLAZING PLATE WHICH HAS A MATERIAL-CONTACTING SURFACE COMPOSED OF A FILM THAT IS DETACHABLY SECURED TO SUCH SURFACE BY AN ADHESIVE OF SUCH A NATURE THAT IT PERMITS THE EASY STRIPPING AWAY OF THE FILM WHEN DESIRED.
Inventors
- 👤 Rolf Bertil Reinhall
- 👤 Steiner Vardheim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:36
CPC Classifications
D; D21; D21J; D21J1/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1975-09-05 | 1976-03-06 | 1976-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-05 | 1980-03-06 | 1980-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-05 | 1984-03-06 | 1984-09-05 | $7700.00 | Window Closed / Lapsed |