US2703293A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of making lignocellulose hardboard
Assignee: Masonite Corp
•
Filing: 1949-11-05
•
Granted: 1955-03-01
•
Expires: 1969-11-05
Abstract
No abstract record available.
Inventors
- 👤 Robert M Boehm
- 👤 Hunt Harold Roy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:53
CPC Classifications
D; D21; D21J; D21J1/00; D21J1/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
PROCESS OF MAKING AN IMPROVED FIBROUS LIGNOCELLULOSE HARDBOARD WHICH COMPRISES IMPREGNATING A FIBROUS LIGNOCELLULOSE HARDBOARD WITH LIGNIN DISSOLVED IN AN ORGANIC SOLVENT, EVAPORATING THE ORGANIC SOLVENT FROM THE BOARD, IMPREGNATING THE BOARD WITH A SICCATIVE MATERIAL CONSISTING OF A MIXTURE OF A VEGETABLE OIL AND PARTIALLY POLYMERIZED PETROLEUM HYDROCARBON CONTAINING CONJUGATED DOUBLE BONDS, THE COMBINED WEIGHT OF IMPREGNANTS IN THE HARDBOARD BEING NOT MORE THAN ABOUT 10% OF THE DRY WEIGHT OF THE BOARD, AND THEN BAKING THE IMPREGNATED BOARD AT AN ELVATED TEMPERATURE FOR A PERIOD OF TIME NOT IN EXCESS OF ABOUT 7 HOURS WHEREBY THE SICCATIVE MATERIAL IS COMPLETELY POLMERIZED AND THE MODULUS OF RUPTURE OF THE TREATED BOARD IS GREATLY INCREASED.
Claim 2
Dependent Claim
115 words
PROCESS OF MAKING AN IMPROVED FIBROUS LIGNOCELLULOSE HARDBOARD WHICH COMPRISES IMPREGNATING A FIBROUS LIGNOCELLULOSE HARDBOARD WITH LIGNIN DISSOLVED IN AN ORGANIC SOLVENT, EVAPORATING THE ORGANIC SOLVENT FROM THE BOARD, IMPREGNATING THE BOARD WITH A SICCATIVE MATERIAL CONSISTING OF A MIXTURE OF A VEGETABLE OIL AND PARTIALLY POLYMERIZED PETROLEUM HYDROCARBON CONTAINING CONJUGATED DOUBLE BONDS, THE COMBINED WEIGHT OF IMPREGNANTS IN THE HARDBOARD BEING NOT MORE THAN ABOUT 10% OF THE DRY WEIGHT OF THE BOARD, AND THEN BAKING THE IMPREGNATED BOARD AT AN ELVATED TEMPERATURE FOR A PERIOD OF TIME NOT IN EXCESS OF ABOUT 7 HOURS WHEREBY THE SICCATIVE MATERIAL IS COMPLETELY POLMERIZED AND THE MODULUS OF RUPTURE OF THE TREATED BOARD IS GREATLY INCREASED.
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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) | 1958-02-28 | 1958-08-30 | 1959-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-02-28 | 1962-08-30 | 1963-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-02-28 | 1966-08-30 | 1967-03-01 | $7700.00 | Window Closed / Lapsed |