US3244648A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phenol-furfural resin compositions
Assignee: National Polychemicals Inc
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Filing: 1962-12-28
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Granted: 1966-04-05
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Expires: 1982-12-28
Abstract
No abstract record available.
Inventors
- 👤 Leopold F Bornstein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:04
CPC Classifications
C; C08; C08G; C08G8/00; C08G8/04; C08G8/06
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
84 words
THE METHOD OF PREPARING A ONE-STEP THERMOSETTING RESINOUS REACTION PRODUCT, WHICH METHOD COMPRISES: REACTING TOGETHER, IN THE ABSENCE OF MONOHYDROXY PHENOLS A POLYMETHYLENE SPACED POLYPHENOL, THE POLYMETHYLENE GROUPS HAVING A LEAST 10 CARBON ATOMS AND THE POLYPHENOL CONTAINING FROM 2 TO 6 PHENOL GROUPS PER MOLECULE, AND FURFURAL UNDER ALKALINE CONDITIONS AT A TEMPERATURE OF BETWEEN ABOUT 50* AND 180*C., THE MOL RATIO OF FURFURAL TO POLYPHENOL BEING FROM ABOUT 0.1 TO 2.0 THEREBY PROVIDING A CLEAR, HOMOGENEOUS THERMOSETTING RESINOUS PRODUCT SOLUBLE IN ISOPROPANOL.
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) | 1969-04-04 | 1969-10-04 | 1970-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-04 | 1973-10-04 | 1974-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-04 | 1977-10-04 | 1978-04-05 | $7700.00 | Window Closed / Lapsed |