US3014924A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalytic process for making unsaturated cyclic acetals
Assignee: EIDP Inc
•
Filing: 1958-04-15
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Granted: 1961-12-26
•
Expires: 1978-04-15
Abstract
No abstract record available.
Inventors
- 👤 Brachman Armand Edward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:19
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/02; C08J3/09; C08J3/091; C08J3/095; C08J2375/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
IN THE PROCESS FOR MAKING UNSATURATED CYCLIC ACETALS WHICH COMPRISES REACTING AN ALPHA, BETA-UNSATURATED ALDEHYDE WITH AN ALIPHATIC POLYOL BEARING AT LEAST TWO HYDROXYL GROUPS BONDED TO DIFFERENT ATOMS IN THE POLYOL MOLECULE, THE IMPROVEMENT WHICH COMPRISES CATALYZING SAID REACTION WITH THE COMBINATION OF A HIGHLY-POROUS SOLID CARRIER HAVING A SURFACE AREA OF AT LEAST 75 SQUARE METERS PER GRAM AND ABOUT FROM 0.025 TO 1.0 MILLIMOLE OF STRONG MINERAL ACID PER UNIT WEIGHT OF CARRIER SAID ACID BEING SELECTED FROM THE GROUP CONSISTING OF PHOSPHORIC ACIDS, HYDROBROMIC ACID, HYDROCHLORIC ACID AND SULFURIC ACID.
Claim 2
Dependent Claim
94 words
IN THE PROCESS FOR MAKING UNSATURATED CYCLIC ACETALS WHICH COMPRISES REACTING AN ALPHA, BETA-UNSATURATED ALDEHYDE WITH AN ALIPHATIC POLYOL BEARING AT LEAST TWO HYDROXYL GROUPS BONDED TO DIFFERENT ATOMS IN THE POLYOL MOLECULE, THE IMPROVEMENT WHICH COMPRISES CATALYZING SAID REACTION WITH THE COMBINATION OF A HIGHLY-POROUS SOLID CARRIER HAVING A SURFACE AREA OF AT LEAST 75 SQUARE METERS PER GRAM AND ABOUT FROM 0.025 TO 1.0 MILLIMOLE OF STRONG MINERAL ACID PER UNIT WEIGHT OF CARRIER SAID ACID BEING SELECTED FROM THE GROUP CONSISTING OF PHOSPHORIC ACIDS, HYDROBROMIC ACID, HYDROCHLORIC ACID AND SULFURIC ACID.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-12-25 | 1965-06-26 | 1965-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-12-25 | 1969-06-26 | 1969-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-12-25 | 1973-06-26 | 1973-12-26 | $7700.00 | Window Closed / Lapsed |