US2629674A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for treating cellulose and product thereof
Assignee: Upson Co
•
Filing: 1949-07-07
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Granted: 1953-02-24
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Expires: 1969-07-07
Abstract
No abstract record available.
Inventors
- 👤 Walter P Ericks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:59
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/03; D21H17/05; D21H17/06; D06; D06M; D06M15/00; D06M15/19; D06M15/37; D06M15/39; D06M15/41; D06M15/423; D21J; D21J1/00; D21J1/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
THE METHOD OF STABILIZING FIBER BOARDS CONSISTING ESSENTIALLY OF FELTED CELLULOSE PULP FIBERS AGAINST EXPANSION AND CONTRACTION WITH CHANGES IN ATMOSPHERIC HUMIDITY, WHICH PROCESS COMPRISES, IMPREGNATING SAID BOARDS SUBSTANTIALLY THROUGHOUT SAID BOARDS WITH A SOLUTION IN A VOLATILE HYDROPHILIC SOLVENT OF A MIXTURE OF A THERMOSETTING RESIN AND AT LEAST ONE POLYHYDRIC ALCOHOL TO CAUSE SAID ALCOHOL TO PENETRATE BETWEEN THE FIBERS AND INTO THE FIBER CELLS, AND DRYING AND HEATING THE RESULTING IMPREGNATED BOARDS TO CURE SAID RESIN, SAID POLYHYDRIC ALCOHOL AND THERMOSETTING RESIN BEING SOLUBLE IN SAID VOLATILE HYDROPHILIC SOLVENT, SAID POLYHYDRIC ALCOHOL HAVING A BOILING POINT AT LEAST AS HIGH AS 150*C., SAID SOLUTION HAVING A CONCENTRATION OF SAID MIXTURE BETWEEN APPROXIMATELY 5 AND 60% AND SAID THERMOSETTING RESIN CONSTITUTING BETWEEN APPROXIMATELY 5 AND 50% OF SAID MIXTURE.
Claim 2
Independent Claim
131 words
THE METHOD OF STABILIZING FIBER BOARDS CONSISTING ESSENTIALLY OF FELTED CELLULOSE PULP FIBERS AGAINST EXPANSION AND CONTRACTION WITH CHANGES IN ATMOSPHERIC HUMIDITY, WHICH PROCESS COMPRISES, IMPREGNATING SAID BOARDS SUBSTANTIALLY THROUGHOUT SAID BOARDS WITH A SOLUTION IN A VOLATILE HYDROPHILIC SOLVENT OF A MIXTURE OF A THERMOSETTING RESIN AND AT LEAST ONE POLYHYDRIC ALCOHOL TO CAUSE SAID ALCOHOL TO PENETRATE BETWEEN THE FIBERS AND INTO THE FIBER CELLS, AND DRYING AND HEATING THE RESULTING IMPREGNATED BOARDS TO CURE SAID RESIN, SAID POLYHYDRIC ALCOHOL AND THERMOSETTING RESIN BEING SOLUBLE IN SAID VOLATILE HYDROPHILIC SOLVENT, SAID POLYHYDRIC ALCOHOL HAVING A BOILING POINT AT LEAST AS HIGH AS 150*C., SAID SOLUTION HAVING A CONCENTRATION OF SAID MIXTURE BETWEEN APPROXIMATELY 5 AND 60% AND SAID THERMOSETTING RESIN CONSTITUTING BETWEEN APPROXIMATELY 5 AND 50% OF SAID MIXTURE.
References Cited (Backward Citations)
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US2045350A
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US2185477A
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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) | 1956-02-24 | 1956-08-25 | 1957-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-02-24 | 1960-08-25 | 1961-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-02-24 | 1964-08-25 | 1965-02-24 | $7700.00 | Window Closed / Lapsed |