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US2644741A
Expired / Lapsed
US
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Carbonaceous additive for molding sand
Assignee: Hill and Griffith Co
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Filing: 1951-06-01
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Granted: 1953-07-07
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Expires: 1971-06-01
Abstract
No abstract record available.
Inventors
- 👤 Edward H King
- 👤 Joseph S Schumacher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:51
CPC Classifications
B; B22; B22C; B22C1/00; B22C1/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
A CARBONACEOUS ADDITIVE FOR MOLDING SAND, SAID ADDITIVE COMPRISING 90 TO 30 PER CENT PULVERIZED BITUMINOUS PLASTIC BY WEIGHT ND 10 TO 70 PER CENT PULVERIZED FURFURAL RESIDUE SAID FURFURAL RESIDUE BEING THE SOLID RESIDUARY PRODUCT RESULTING FROM THE ACID HYDROLYSIS OF PENTOSAN CONTAINING MATERIAL TO FORM FURFURAL BY WEIGHT MIXED TOGETHER TO CONSITUTE A HOMOGENEOUS BODY WHICH DOES NOT CAKE IN STORAGE BUT HAS ADHESIVE PROPERTIES WHEN USED.
Claim 2
Dependent Claim
69 words
A CARBONACEOUS ADDITIVE FOR MOLDING SAND, SAID ADDITIVE COMPRISING 90 TO 30 PER CENT PULVERIZED BITUMINOUS PLASTIC BY WEIGHT ND 10 TO 70 PER CENT PULVERIZED FURFURAL RESIDUE SAID FURFURAL RESIDUE BEING THE SOLID RESIDUARY PRODUCT RESULTING FROM THE ACID HYDROLYSIS OF PENTOSAN CONTAINING MATERIAL TO FORM FURFURAL BY WEIGHT MIXED TOGETHER TO CONSITUTE A HOMOGENEOUS BODY WHICH DOES NOT CAKE IN STORAGE BUT HAS ADHESIVE PROPERTIES WHEN USED.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-07-06 | 1957-01-05 | 1957-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-06 | 1961-01-05 | 1961-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-06 | 1965-01-05 | 1965-07-07 | $7700.00 | Window Closed / Lapsed |