Patent US2856381A successfully refreshed from Google Patents.
US2856381A
Expired / Lapsed
US
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Foundry sand binder composition containing at least three phenol-formaldehyde resins
Assignee: Hexion Inc
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Filing: 1955-06-01
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Granted: 1958-10-14
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Expires: 1975-06-01
Abstract
No abstract record available.
Inventors
- 👤 Thomas J Mcnaughtan
- 👤 Howard E Hoyt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:36
CPC Classifications
B; B22; B22C; B22C1/00; B22C1/16; B22C1/20; B22C1/22; B22C1/2233; B22C1/2246; B22C1/2253
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
A BINDER CMPRISITION FOR SAND IN SHELL MOLDS FOR METAL CASTING, THE BINDER COMPOSITION COMPRISING A SOLID PUILVERIZED MIXTURE OF AT LEAST THREE RESINS THAT ARE CONDENSATION PRODUCT OF 0.7-1 MOLE OF FORMALDEHYDE AND 1 OF PHENOL WITH HEXAMETHYLENETETRAMINE AS CURING AGENT, THE SAID RESIN BEING FUSIBLE AND THEREMOSETTING IN CONTACT WITH THE CURING AGENT, THE THREE RESINS SEPARATELY HAVING VISCOSITIES, AS MEASURED BY THE FLOW TIME REQUIRED FOR 1 GRAM OF THE CONDENSATION PRODUCT TO FLOW 40 MM. ON A METAL PLATE INCLINED AT AN ANGLE OF 10* FROM THE HORIZONTAL AND MAINTAINED AT 175*C., OF 2-15 SECONDS, 20-70 SECONDS, AND 200-700 SECONDS, RESPECTIVELY, AND THE RATES OF THERMOSETTING OD THE RESINS BEING IN THE INVERSE ORDER OF THEIR VISCOSITIES.
Claim 2
Dependent Claim
121 words
A BINDER CMPRISITION FOR SAND IN SHELL MOLDS FOR METAL CASTING, THE BINDER COMPOSITION COMPRISING A SOLID PUILVERIZED MIXTURE OF AT LEAST THREE RESINS THAT ARE CONDENSATION PRODUCT OF 0.7-1 MOLE OF FORMALDEHYDE AND 1 OF PHENOL WITH HEXAMETHYLENETETRAMINE AS CURING AGENT, THE SAID RESIN BEING FUSIBLE AND THEREMOSETTING IN CONTACT WITH THE CURING AGENT, THE THREE RESINS SEPARATELY HAVING VISCOSITIES, AS MEASURED BY THE FLOW TIME REQUIRED FOR 1 GRAM OF THE CONDENSATION PRODUCT TO FLOW 40 MM. ON A METAL PLATE INCLINED AT AN ANGLE OF 10* FROM THE HORIZONTAL AND MAINTAINED AT 175*C., OF 2-15 SECONDS, 20-70 SECONDS, AND 200-700 SECONDS, RESPECTIVELY, AND THE RATES OF THERMOSETTING OD THE RESINS BEING IN THE INVERSE ORDER OF THEIR VISCOSITIES.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-10-13 | 1962-04-14 | 1962-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-13 | 1966-04-14 | 1966-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-13 | 1970-04-14 | 1970-10-14 | $7700.00 | Window Closed / Lapsed |