Patent US2766259A successfully refreshed from Google Patents.
US2766259A
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US
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Acetals of 2-formyl-6-alkoxytetrahydropyrans
Assignee: Shell Development Co
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Filing: 1950-06-17
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Granted: 1956-10-09
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Expires: 1970-06-17
Abstract
No abstract record available.
Inventors
- 👤 Richard R Whetstone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:51
CPC Classifications
C; C07; C07D; C07D309/00; C07D309/02; C07D309/08; C07D309/10; G; G03; G03C; G03C1/00; G03C1/005; G03C1/04; G03C1/06; G03C1/30
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
47 words
THE PROCESS WHICH COMPRISES REACTING ONE MOLE OF 2HYDROXYHEXANEDIAL WITH THREE MOLES OF AN ALCOHOL, ROH WHEREIN R IS AN ALIPHATIC HYDROCARBON RADICAL HAVING 1 TO 20 CARBON ATOMS, IN THE PRESENCE OF AN ACIDIC CATALYST TO PRODUCE ONE MOLE OF A COMPOUND DEFINED BY THE FORMULA
References Cited (Backward Citations)
US2517543A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-10-09 | 1960-04-09 | 1960-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-09 | 1964-04-09 | 1964-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-09 | 1968-04-09 | 1968-10-09 | $7700.00 | Window Closed / Lapsed |