US3127450A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of ketals
Assignee: Dow Chemical Co
•
Filing: 1959-03-02
•
Granted: 1964-03-31
•
Expires: 1979-03-02
Abstract
No abstract record available.
Inventors
- 👤 Nicholas B Lorette
- 👤 William L Howard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:19
CPC Classifications
C; C07; C07C; C07C41/00; C07C41/48; C07C41/58
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
18 words
A METHOD FOR PREPARING KETONE ACETALS WHICH CONSISTS ESSENTIALLY OF REACTING A KETONE DIMETHYL ACETAL HAVING THE FORMULA
Claim 2
Independent Claim
18 words
A METHOD FOR PREPARING KETONE ACETALS WHICH CONSISTS ESSENTIALLY OF REACTING A KETONE DIMETHYL ACETAL HAVING THE FORMULA
References Cited (Backward Citations)
US2229665A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-03-31 | 1967-09-30 | 1968-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-03-31 | 1971-09-30 | 1972-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-03-31 | 1975-09-30 | 1976-03-31 | $7700.00 | Window Closed / Lapsed |