Patent US2583618A successfully refreshed from Google Patents.
US2583618A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of hot-molded articles from wood sawdust
Assignee: Rock Island Millwork Co
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Filing: 1948-07-23
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Granted: 1952-01-29
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Expires: 1968-07-23
Abstract
No abstract record available.
Inventors
- 👤 Weyerhaeuser Frederick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:33
CPC Classifications
B; B27; B27N; B27N3/00; B27N3/08; B27N3/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
152 words
THE METHOD WHICH COMPRISES APPLYING A FILM OF WATER TO THE SURFACE OF A METAL SHEET, COVERING SAID WETTED SURFACE WITH A DRY UNIFORM MIXTURE OF WOOD SAWDUST AND SOLID HEAT-ACTIVATABLE BINDER THEREFOR IN AN AMOUNT IN THE RANGE FROM 4 TO 25 PARTS BY WEIGHT TO 100 PARTS OF BONE-DRY WOOD IN THE SAWDUST, APPLYING WATER TO THE TOP OF SAID MIXTURE TO WET THE PARTICLES THEREOF, THE TOTAL AMOUNT OF WATER IN THE RESULTING MASS BEING IN THE RANGE FROM 12 TO 40 PARTS BY WEIGHT TO 100 PARTS OF BONE-DRY WOOD SUBSTANCE, AND HEATING AND PRESSING SAID MIXTURE TO A DENSITY IN THE RANGE FROM 45 TO 65 LBS. PER CU. FT. ON SAID SHEET BETWEEN PLATENS HAVING A TEMPERATURE IN THE RANGE FROM 300* TO 400* F. WHILE THE TWO FACES OF SAID MIXTURE ARE INITIALLY WET TO DRY AND BIND THE MIXTURE AS AN INTEGRAL MOLDED BODY.
Claim 2
Independent Claim
152 words
THE METHOD WHICH COMPRISES APPLYING A FILM OF WATER TO THE SURFACE OF A METAL SHEET, COVERING SAID WETTED SURFACE WITH A DRY UNIFORM MIXTURE OF WOOD SAWDUST AND SOLID HEAT-ACTIVATABLE BINDER THEREFOR IN AN AMOUNT IN THE RANGE FROM 4 TO 25 PARTS BY WEIGHT TO 100 PARTS OF BONE-DRY WOOD IN THE SAWDUST, APPLYING WATER TO THE TOP OF SAID MIXTURE TO WET THE PARTICLES THEREOF, THE TOTAL AMOUNT OF WATER IN THE RESULTING MASS BEING IN THE RANGE FROM 12 TO 40 PARTS BY WEIGHT TO 100 PARTS OF BONE-DRY WOOD SUBSTANCE, AND HEATING AND PRESSING SAID MIXTURE TO A DENSITY IN THE RANGE FROM 45 TO 65 LBS. PER CU. FT. ON SAID SHEET BETWEEN PLATENS HAVING A TEMPERATURE IN THE RANGE FROM 300* TO 400* F. WHILE THE TWO FACES OF SAID MIXTURE ARE INITIALLY WET TO DRY AND BIND THE MIXTURE AS AN INTEGRAL MOLDED BODY.
References Cited (Backward Citations)
US1905225A
Cited
US2183857A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-01-28 | 1955-07-30 | 1956-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-01-28 | 1959-07-30 | 1960-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-01-28 | 1963-07-30 | 1964-01-29 | $7700.00 | Window Closed / Lapsed |