Patent US2703293A successfully refreshed from Google Patents.
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 19:46
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.
References Cited (Backward Citations)
US1919723A
Cited
US1919722A
Cited
US1927086A
Cited
US1941536A
Cited
US1948979A
Cited
US2044213A
Cited
US2321938A
Cited
US2317328A
Cited
US2381269A
Cited
US2405978A
Cited
US2376688A
Cited
US2376687A
Cited
US2379163A
Cited
US2485587A
Cited
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 |