Patent US2527795A successfully refreshed from Google Patents.
US2527795A
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Process for preparing a urea formaldehyde cellulosic composition
Assignee: Plaswood Corp
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Filing: 1946-01-14
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Granted: 1950-10-31
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Expires: 1966-01-14
Abstract
No abstract record available.
Inventors
- 👤 Robert A Caughey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:47
CPC Classifications
C; C08; C08L; C08L61/00; C08L61/20; C08L61/22; C08L61/24; C08L97/00; C08L97/02
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
94 words
A PROCESS FOR MANUFACTURING A SYNTHETIC WOOD MATERIAL COMPRISING REACTING ONE MOLE UREA AND FROM ONE TO TWO MOLES FORMALDEHYDE AT A PH BETWEEN 8.0 AND 9.0 AND AT A TEMPERATURE OF AT LEAST 100*C. WHILE STIRRING UNTIL THE SPECIFIC GRAVITY OF THE SOLUTION REACHES ABOUT 29* BAUME THEREBY OBTAINING A LOW CONDENSATION, INCOMPLETELY POLYMERIZED REACTION PRODUCT, COOLING WHILE CONTINUING THE STIRRING TO APPROXIMATELY ROOM TEMPERATURE, ADDING A SULFURIC ACID CATALYST, ADDING 50 TO 85% DRIED WOOD WASTE AND MOLDING THE MIXED MASS THUS OBTAINED UNDER HEAT AND PRESSURE TO FORM A RIGID ARTICLE.
References Cited (Backward Citations)
US2192129A
Cited
US2029894A
Cited
US2191949A
Cited
US2033411A
Cited
US2115550A
Cited
US2317181A
Cited
US2328425A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-10-30 | 1954-05-01 | 1954-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-10-30 | 1958-05-01 | 1958-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-10-30 | 1962-05-01 | 1962-10-31 | $7700.00 | Window Closed / Lapsed |