US2676108A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of preparing plastic substances and mold compositions and products thereof
Assignee: Masonite Corp
•
Filing: 1949-09-14
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Granted: 1954-04-20
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Expires: 1969-09-14
Abstract
No abstract record available.
Inventors
- 👤 James M Fuller
- 👤 Thomas H Walton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:08
CPC Classifications
B; B22; B22C; B22C1/00; B22C1/16; B22C1/20; B22C1/22; B22C1/2293; C; C08; C08G; C08G63/00; C08G63/02; C08G63/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
125 words
PROCESS OF PREPARING FOUNDRY SAND CORES WHICH COMPRISES MIXING SAND WITH A BINDER THEREFOR AND WATER, SUBJECTING SAID MIXTURE TO PRESSURE IN A MOLD HAVING THE SIZE AND SHAPE OF THE DESIRED FINISHED PRODUCT TO FORM A SHAPED BODY THEREOF, HEATING SAID SHAPED BODY AT A TEMPERATURE AND FOR A PERIOD OF TIME SUFFICIENT TO CONVERT SAID BINDER INTO A STRONG BINDER SUBSTANTIALLY INSOLUBLE IN WATER, SAID BINDER BEING SELECTED FROM A MEMBER OF THE GROUP CONSISTING OF (A) POLYCARBOXYLIC ACIDS CONTAINING ONLY CARBON, HYDROGEN, AND OXYGEN AND ANHYDRIDES THEREOF IN ADMIXTURE WITH (B) THE WATER-SOLUBLE REACTION PRODUCT CONTAINING FROM ABOUT 60% TO ABOUT 80% OF PENTOSANS AND HEXONAS RESULTING FROM HYDROLYZING LIGNOCELLULOSE MATERIAL AT AN ELEVATED TEMPERATURE AND PRESSURE IN THE PRESENCE OF MOISTURE.
Claim 2
Dependent Claim
125 words
PROCESS OF PREPARING FOUNDRY SAND CORES WHICH COMPRISES MIXING SAND WITH A BINDER THEREFOR AND WATER, SUBJECTING SAID MIXTURE TO PRESSURE IN A MOLD HAVING THE SIZE AND SHAPE OF THE DESIRED FINISHED PRODUCT TO FORM A SHAPED BODY THEREOF, HEATING SAID SHAPED BODY AT A TEMPERATURE AND FOR A PERIOD OF TIME SUFFICIENT TO CONVERT SAID BINDER INTO A STRONG BINDER SUBSTANTIALLY INSOLUBLE IN WATER, SAID BINDER BEING SELECTED FROM A MEMBER OF THE GROUP CONSISTING OF (A) POLYCARBOXYLIC ACIDS CONTAINING ONLY CARBON, HYDROGEN, AND OXYGEN AND ANHYDRIDES THEREOF IN ADMIXTURE WITH (B) THE WATER-SOLUBLE REACTION PRODUCT CONTAINING FROM ABOUT 60% TO ABOUT 80% OF PENTOSANS AND HEXONAS RESULTING FROM HYDROLYZING LIGNOCELLULOSE MATERIAL AT AN ELEVATED TEMPERATURE AND PRESSURE IN THE PRESENCE OF MOISTURE.
References Cited (Backward Citations)
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GB348315A
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US1977728A
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US2156160A
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US2242601A
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US2418293A
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US2448624A
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US2549822A
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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) | 1957-04-19 | 1957-10-19 | 1958-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-04-19 | 1961-10-19 | 1962-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-04-19 | 1965-10-19 | 1966-04-20 | $7700.00 | Window Closed / Lapsed |