US2510496A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Furfurylated urea resins and method of preparation
Assignee: Wyeth Holdings LLC
•
Filing: 1946-12-24
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Granted: 1950-06-06
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Expires: 1966-12-24
Abstract
No abstract record available.
Inventors
- 👤 Jr Frank J Carlin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:22
CPC Classifications
C; C08; C08G; C08G16/00; C08G16/02; C08G16/025; C08G16/0256; C08G16/0262
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
44 words
A PROCESS FOR THE PREPARATION OF A FURFURYLATED ALKYL UREA ETHER RESIN COMPRISING HEATING UNDER ALKALINE CONDITIONS AN ALKYL ETHER OF DIMETHYLOL UREA WITH FURFURYL ALCOHOL IN THE PRESENCE OF AN ALKALINE CATALYST, THE ALKYL OF SAID ETHER HAVING LESS THAN 7 CARBON ATOMS.
Claim 2
Dependent Claim
44 words
A PROCESS FOR THE PREPARATION OF A FURFURYLATED ALKYL UREA ETHER RESIN COMPRISING HEATING UNDER ALKALINE CONDITIONS AN ALKYL ETHER OF DIMETHYLOL UREA WITH FURFURYL ALCOHOL IN THE PRESENCE OF AN ALKALINE CATALYST, THE ALKYL OF SAID ETHER HAVING LESS THAN 7 CARBON ATOMS.
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) | 1953-06-05 | 1953-12-05 | 1954-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-06-05 | 1957-12-05 | 1958-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-06-05 | 1961-12-05 | 1962-06-06 | $7700.00 | Window Closed / Lapsed |