US2612445A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of making hardboard and the like containing furfuryl alcohol resins
Assignee: Masonite Corp
•
Filing: 1949-07-30
•
Granted: 1952-09-30
•
Expires: 1969-07-30
Abstract
No abstract record available.
Inventors
- 👤 Spence Oswald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:43
CPC Classifications
D; D21; D21J; D21J1/00; D21J1/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
AN IMPROVED METHOD OF PRODUCING HARDENED RESIN-FIBER SHEET MATERIAL WHICH COMPRISES SLURRYING HYDROLYZED LIGNOCELLLOSE FIBER IN WATER TO FORM A SUSPENSION OF FIBER IN WATER AT A CONSISTENCY OF ABOUT 1 TO 10%, ADDING TO THE FIBER SUSPENSION FROM ABOUT 0.175% TO ABOUT 50%, BASED ON THE DRY FIBER WEIGHT, OF A LIQUID SYNTEHTIC RESIN CHARACTERIZED BY SPECIFIC AFFINITY FOR THE HYDROLYZED LIGNOCELLULOSE FIBER WHEREBY SUBSTANTIALLY ALL OF THE ADDED RESIN IS DEPOSITED UNIFORMLY THROUGHOUT THE SUSPENDED FIBERS, SAID RESIN COMPRISING ESSENTIALLY A PARTIALLY CONDENSED WATER-INSOLUBLE FURFURYL ALCOHOL RESIN, REMOVING THE WATER OF THE SUSPENSION FROM THE COMPOSITE OF FIBER AND RESIN, AND HEATING AND PRESSING THE COMPOSITE OF FIBER AND RESIN AT TEMPERATURES AND PRESSURES SUFFICIENT TO SECURE BONDING OF THE FIBER INTO A HARDENED PRODUCT.
Claim 2
Dependent Claim
127 words
AN IMPROVED METHOD OF PRODUCING HARDENED RESIN-FIBER SHEET MATERIAL WHICH COMPRISES SLURRYING HYDROLYZED LIGNOCELLLOSE FIBER IN WATER TO FORM A SUSPENSION OF FIBER IN WATER AT A CONSISTENCY OF ABOUT 1 TO 10%, ADDING TO THE FIBER SUSPENSION FROM ABOUT 0.175% TO ABOUT 50%, BASED ON THE DRY FIBER WEIGHT, OF A LIQUID SYNTEHTIC RESIN CHARACTERIZED BY SPECIFIC AFFINITY FOR THE HYDROLYZED LIGNOCELLULOSE FIBER WHEREBY SUBSTANTIALLY ALL OF THE ADDED RESIN IS DEPOSITED UNIFORMLY THROUGHOUT THE SUSPENDED FIBERS, SAID RESIN COMPRISING ESSENTIALLY A PARTIALLY CONDENSED WATER-INSOLUBLE FURFURYL ALCOHOL RESIN, REMOVING THE WATER OF THE SUSPENSION FROM THE COMPOSITE OF FIBER AND RESIN, AND HEATING AND PRESSING THE COMPOSITE OF FIBER AND RESIN AT TEMPERATURES AND PRESSURES SUFFICIENT TO SECURE BONDING OF THE FIBER INTO A HARDENED PRODUCT.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-09-30 | 1956-03-31 | 1956-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-09-30 | 1960-03-31 | 1960-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-09-30 | 1964-03-31 | 1964-09-30 | $7700.00 | Window Closed / Lapsed |