Patent US3168489A successfully refreshed from Google Patents.
US3168489A
Expired / Lapsed
US
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Process of producing a foundry core composition
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
2026-10-29 15:58
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; Y; Y10; Y10S; Y10S524/00; Y10S524/906
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
136 words
A PROCESS OF PRODUCING A FOUNDRY CORE COMPOSITION COMPRISING THE STEPS OF: (A) PREPARING A FIRST PACKAGE INCLUDING A MIXTURE OF ABOUT 5 TO 50 PARTS BY WEIGHT OF FURFURYL ALCOHOL AND ABOUT 90 TO 35 PARTS BY WEIGHT OF A STABLE NONPOLYMERIZED AQUEOUS MIXTURE OF UREA, FORMALDEHYDE, AND EQUILIBRIUM PRODUCTS THEREOF, SAID AQUEOUS MIXTURE CONTAINING AT MOST ABOUT 15% BY WEIGHT OF WATER; (B) PREPARING A SECOND PACKAGE INCLUDING A MIXTURE OF ABOUT 1 TO 3 PARTS BY WEIGHT OF AN ACIDIC CATALYST, AND SUFFICIENT UREA SO AS TO GIVE A MOLAR RATIO OF AVAILABLE UREA TO AVAILABLE FORMALDEHYDE IN THE RANGE OF ABOUT 1:1.5 TO 1:2.5 WHEN SAID PACKAGE AND SAID SECOND PACKAGE ARE COMBINED; AND (C) ADMIXING SAID FIRST PACKAGE, SAID SECOND PACKAGE AND ABOUT 3,000 TO 10,000 PARTS BY WEIGHT OF SAND.
Claim 2
Dependent Claim
136 words
A PROCESS OF PRODUCING A FOUNDRY CORE COMPOSITION COMPRISING THE STEPS OF: (A) PREPARING A FIRST PACKAGE INCLUDING A MIXTURE OF ABOUT 5 TO 50 PARTS BY WEIGHT OF FURFURYL ALCOHOL AND ABOUT 90 TO 35 PARTS BY WEIGHT OF A STABLE NONPOLYMERIZED AQUEOUS MIXTURE OF UREA, FORMALDEHYDE, AND EQUILIBRIUM PRODUCTS THEREOF, SAID AQUEOUS MIXTURE CONTAINING AT MOST ABOUT 15% BY WEIGHT OF WATER; (B) PREPARING A SECOND PACKAGE INCLUDING A MIXTURE OF ABOUT 1 TO 3 PARTS BY WEIGHT OF AN ACIDIC CATALYST, AND SUFFICIENT UREA SO AS TO GIVE A MOLAR RATIO OF AVAILABLE UREA TO AVAILABLE FORMALDEHYDE IN THE RANGE OF ABOUT 1:1.5 TO 1:2.5 WHEN SAID PACKAGE AND SAID SECOND PACKAGE ARE COMBINED; AND (C) ADMIXING SAID FIRST PACKAGE, SAID SECOND PACKAGE AND ABOUT 3,000 TO 10,000 PARTS BY WEIGHT OF SAND.
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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) | 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 |