US2924548A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for making laminated hardboard product
Assignee: Masonite Corp
•
Filing: 1956-07-16
•
Granted: 1960-02-09
•
Expires: 1976-07-16
Abstract
No abstract record available.
Inventors
- 👤 William A Cotton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:53
CPC Classifications
D; D21; D21J; D21J1/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
125 words
A METHOD OF PREPARING A LAMINATED SHEET PRODUCT OF FIBROUS HYDROLYZED REDWOOD LIGNOCELLULOSE WHICH COMPRISES FELTING A LAP OF SAID LIGNOCELLULOSE FROM AN AQUEOUS SLURRY THEREOF, PARTIALLY DEWATERING SAID LAP, FLOWING ONTO THE UPPER SURFACE OF SAID LAP A QUANTITY OF WATER SUFFICIENT TO SUBSTANTIALLY REMOVE FROM THE UPPER PORTION OF THE LAP THE FINES AND WATER SOLUBLE MATERIAL THEREIN AND TO CONCENTRATE SAID MATERIAL IN THE BOTTOM PORTION OF THE LAP, DRYING THE LAP TO A MOISTURE CONTENT OF ABOUT 0.2-2.0%, ARRANGING TWO OF SAID DRIED LAPS IN FACER TO FACE RELATIONSHIP, THE FACES IN CONTACT WITH EACH OTHER BEING THE ONES CONTAINING SAID CONCENTRATED MATERIAL, AND THEREAFTER CONSOLIDATING SAID LAPS INTO A LAMINATED SHEET PRODUCT BY THE APPLICATION THERETO OF HEAT AND PRESSURE.
Claim 2
Independent Claim
125 words
A METHOD OF PREPARING A LAMINATED SHEET PRODUCT OF FIBROUS HYDROLYZED REDWOOD LIGNOCELLULOSE WHICH COMPRISES FELTING A LAP OF SAID LIGNOCELLULOSE FROM AN AQUEOUS SLURRY THEREOF, PARTIALLY DEWATERING SAID LAP, FLOWING ONTO THE UPPER SURFACE OF SAID LAP A QUANTITY OF WATER SUFFICIENT TO SUBSTANTIALLY REMOVE FROM THE UPPER PORTION OF THE LAP THE FINES AND WATER SOLUBLE MATERIAL THEREIN AND TO CONCENTRATE SAID MATERIAL IN THE BOTTOM PORTION OF THE LAP, DRYING THE LAP TO A MOISTURE CONTENT OF ABOUT 0.2-2.0%, ARRANGING TWO OF SAID DRIED LAPS IN FACER TO FACE RELATIONSHIP, THE FACES IN CONTACT WITH EACH OTHER BEING THE ONES CONTAINING SAID CONCENTRATED MATERIAL, AND THEREAFTER CONSOLIDATING SAID LAPS INTO A LAMINATED SHEET PRODUCT BY THE APPLICATION THERETO OF HEAT AND PRESSURE.
References Cited (Backward Citations)
US1730849A
Cited
US1707333A
Cited
US1884563A
Cited
US1995145A
Cited
US2120137A
Cited
US1951017A
Cited
US2098733A
Cited
US2380214A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-02-08 | 1963-08-10 | 1964-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-08 | 1967-08-10 | 1968-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-08 | 1971-08-10 | 1972-02-09 | $7700.00 | Window Closed / Lapsed |