US2999829A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aqueous shell molding composition comprising maleic acid, furfuryl alcohol, and urea
Assignee: Individual
•
Filing: 1954-06-25
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Granted: 1961-09-12
•
Expires: 1974-06-25
Abstract
No abstract record available.
Inventors
- 👤 Leo H Treat
- 👤 Robert C Shaffer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:03
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/34; C08G65/36; B; B22; B22C; B22C1/00; B22C1/16; B22C1/20; B22C1/22; B22C1/2233; B22C1/224; C08F; C08F22/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
A METASTABLE, SUBSTANTIALLY MONOMERIC SOLUTION CAPABLE OF RAPID POLYMERIZATION TO AN INFUSIBLE AND INSOLUBLE SOLID UPON THE APLICATION OF HEAT, SAID SOLUTION COMPRISING ABOUT 100 PARTS OF FURFURYL ALCOHOL, 20 TO 50 PARTS OF A SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF MALEIC ACID AND MALEIC ANHYDRIDE AND 2 TO 10% OF UREA BASED UPON THE COMBINED WEIGHT OF THE FURFURYL ALCOHOL AND MALEIC CONSTITUENT, SAID SOLUTION BEING STABILIZED BY THE PRESENCE OF 0.2 TO 5% BY WEIGHT OF AMMONIUM CHLORIDE.
Claim 2
Dependent Claim
81 words
A METASTABLE, SUBSTANTIALLY MONOMERIC SOLUTION CAPABLE OF RAPID POLYMERIZATION TO AN INFUSIBLE AND INSOLUBLE SOLID UPON THE APLICATION OF HEAT, SAID SOLUTION COMPRISING ABOUT 100 PARTS OF FURFURYL ALCOHOL, 20 TO 50 PARTS OF A SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF MALEIC ACID AND MALEIC ANHYDRIDE AND 2 TO 10% OF UREA BASED UPON THE COMBINED WEIGHT OF THE FURFURYL ALCOHOL AND MALEIC CONSTITUENT, SAID SOLUTION BEING STABILIZED BY THE PRESENCE OF 0.2 TO 5% BY WEIGHT OF AMMONIUM CHLORIDE.
References Cited (Backward Citations)
US2432890A
Cited
US2534743A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-09-11 | 1965-03-13 | 1965-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-09-11 | 1969-03-13 | 1969-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-09-11 | 1973-03-13 | 1973-09-12 | $7700.00 | Window Closed / Lapsed |