US3168490A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Foundry core binder and process for preparation thereof
Assignee: Quaker Oats Co
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Filing: 1960-07-11
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Granted: 1965-02-02
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Expires: 1980-07-11
Abstract
No abstract record available.
Inventors
- 👤 Lloyd H Brown
- 👤 David D Watson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:52
CPC Classifications
C; C08; C08G; C08G16/00; C08G16/02; C08G16/025; C08G16/0256; C08G16/0262; B; B22; B22C; B22C1/00; B22C1/16; B22C1/20; B22C1/22; B22C1/2233; B22C1/224; C08G12/00; C08G12/02; C08G12/04; C08G12/10; C08G12/12; C23; C23C; C23C14/00; C23C14/0005
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
155 words
A PROCESS FOR THE PREPARATION OF A STABLE, LIQUID, RESINOUS, FOUNDRY CORE BINDER COMPRISING THE STEPS OF, (A) FORMING A SOLUTION FROM AN AQUEOUS MIXTURE OF FORMALDEHYDE, UREA AND METHYOL UREAS, SAID AQUEOUS MIXTURE CONTAINING AT MOST ABOUT 15% BY WEIGHT OF WATER; AND FURFURYL ALCOHOL; THE MOLAR RATIO OF TOTAL AVAILABLE UREA TO AVAILABLE FORMALDEHYDE IN SAID SOLUTION BEING IN THE RANGE OF ABOUT 1:1.75 TO 1:3.0, SAID FURFURYL ALCOHOL BEING PRESENT IN SAID SOLUTION IN SUCH AMOUNT THAT IT CONSTITUTES ABOUT 15 TO 50% BY WEIGHT OF SAID SOLUTION; (B) ADJUSTING SAID SOLUTION TO A PH IN THE RANGE OF ABOUT 5.0 TO 6.5; (C) THEN REFLUXING THE ADJUSTED SOLUTON AT ABOUT 95* TO 105*C. UNTIL THE ADJUSTED SOLUTION HAS A VISCOSITY IN THE RANGE OF ABOUT 350 TO 3000 CENTIPOISES IF MEASURED AT 25*C.; AND (D) THEN ADJUSTING THE REFLUXED SOLUTION TO A PH IN THE RANGE OF ABOUT 6.5 TO 8.5.
Claim 2
Dependent Claim
155 words
A PROCESS FOR THE PREPARATION OF A STABLE, LIQUID, RESINOUS, FOUNDRY CORE BINDER COMPRISING THE STEPS OF, (A) FORMING A SOLUTION FROM AN AQUEOUS MIXTURE OF FORMALDEHYDE, UREA AND METHYOL UREAS, SAID AQUEOUS MIXTURE CONTAINING AT MOST ABOUT 15% BY WEIGHT OF WATER; AND FURFURYL ALCOHOL; THE MOLAR RATIO OF TOTAL AVAILABLE UREA TO AVAILABLE FORMALDEHYDE IN SAID SOLUTION BEING IN THE RANGE OF ABOUT 1:1.75 TO 1:3.0, SAID FURFURYL ALCOHOL BEING PRESENT IN SAID SOLUTION IN SUCH AMOUNT THAT IT CONSTITUTES ABOUT 15 TO 50% BY WEIGHT OF SAID SOLUTION; (B) ADJUSTING SAID SOLUTION TO A PH IN THE RANGE OF ABOUT 5.0 TO 6.5; (C) THEN REFLUXING THE ADJUSTED SOLUTON AT ABOUT 95* TO 105*C. UNTIL THE ADJUSTED SOLUTION HAS A VISCOSITY IN THE RANGE OF ABOUT 350 TO 3000 CENTIPOISES IF MEASURED AT 25*C.; AND (D) THEN ADJUSTING THE REFLUXED SOLUTION TO A PH IN THE RANGE OF ABOUT 6.5 TO 8.5.
References Cited (Backward Citations)
CA529053A
Cited
US2861980A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-02-02 | 1968-08-03 | 1969-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-02-02 | 1972-08-03 | 1973-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-02-02 | 1976-08-03 | 1977-02-02 | $7700.00 | Window Closed / Lapsed |