US2692895A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of pantothenaldehyde and acetals thereof
Assignee: Individual
•
Filing: 1951-08-09
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Granted: 1954-10-26
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Expires: 1971-08-09
Abstract
No abstract record available.
Inventors
- 👤 Opfermann Adolf Christia Josef
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:05
CPC Classifications
C; C07; C07C; C07C233/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
A PROCESS FOR THE PRODUCTION OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF PANTOTHENALDEHYDE AND ITS ACETALS WHICH CONSISTS IN FORMING A REACTION SOLUTION CONSISTING OF EQUIMOLECULAR QUANTITIES OF ALPHA-HYDROXY-BETABETA - DIMETHYL - GAMMA - HYDROXY - BUTYRYL AMIDE AND A COMPOUND SELECTED FROM THE GROUP CONSISTING OF ACROLEIN AND ACROLEIN ACETALS DISSOLVED IN AN ALKANOL CONTAINING NOT MORE THAN TWO CARBON ATOMS AND PERMITTING SUCH AMIDE AND ACROLEIN COMPOUND TO REACT AT AN ELEVATED TEMPERATURE UP TO 45* C.
Claim 2
Dependent Claim
81 words
A PROCESS FOR THE PRODUCTION OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF PANTOTHENALDEHYDE AND ITS ACETALS WHICH CONSISTS IN FORMING A REACTION SOLUTION CONSISTING OF EQUIMOLECULAR QUANTITIES OF ALPHA-HYDROXY-BETABETA - DIMETHYL - GAMMA - HYDROXY - BUTYRYL AMIDE AND A COMPOUND SELECTED FROM THE GROUP CONSISTING OF ACROLEIN AND ACROLEIN ACETALS DISSOLVED IN AN ALKANOL CONTAINING NOT MORE THAN TWO CARBON ATOMS AND PERMITTING SUCH AMIDE AND ACROLEIN COMPOUND TO REACT AT AN ELEVATED TEMPERATURE UP TO 45* C.
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) | 1957-10-25 | 1958-04-26 | 1958-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-10-25 | 1962-04-26 | 1962-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-10-25 | 1966-04-26 | 1966-10-26 | $7700.00 | Window Closed / Lapsed |