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Patent US2993913A successfully refreshed from Google Patents.
US2993913A
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Preparation of 2, 2-bis (hydroxymethyl) tetrahydrofuran
Assignee: Quaker Oats Co
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Filing: 1959-01-07
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Granted: 1961-07-25
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Expires: 1979-01-07
Abstract
No abstract record available.
Inventors
- 👤 Andrew P Dunlop
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 05:17
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/15; C08K5/151; C08K5/1535; C07; C07D; C07D307/00; C07D307/02; C07D307/04; C07D307/10; C07D307/12; Y; Y10; Y10S; Y10S516/00; Y10S516/01
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
34 words
A PROCESS FOR THE PREPARATION OF 2,2-BIS(HYDROXYMETHYL)TETRAHYDROFURAN WHICH COMPRISES REACTING AN AQUEOUS SOLUTIONOF FORMALDEHYDE AND TETGRAHYDROFURFURAL IN THE PRESENCE OF AN ALKALINE CONDENSING AGENT AND THEN RECOVERING THE DESIRED PRODUCT FROM THE REACTION MIXTURE.
Claim 2
Dependent Claim
34 words
A PROCESS FOR THE PREPARATION OF 2,2-BIS(HYDROXYMETHYL)TETRAHYDROFURAN WHICH COMPRISES REACTING AN AQUEOUS SOLUTIONOF FORMALDEHYDE AND TETGRAHYDROFURFURAL IN THE PRESENCE OF AN ALKALINE CONDENSING AGENT AND THEN RECOVERING THE DESIRED PRODUCT FROM THE REACTION MIXTURE.
References Cited (Backward Citations)
US2851499A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-24 | 1965-01-23 | 1965-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-24 | 1969-01-23 | 1969-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-24 | 1973-01-23 | 1973-07-25 | $7700.00 | Window Closed / Lapsed |