US2491915A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of acetals
Assignee: EIDP Inc
•
Filing: 1946-06-07
•
Granted: 1949-12-20
•
Expires: 1966-06-07
Abstract
No abstract record available.
Inventors
- 👤 Barrick Paul Latrell
- 👤 Pavlic Albert Alan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:55
CPC Classifications
C; C07; C07C; C07C43/00; C07C43/30
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1312186A
Cited
GB283112A
Cited
US1979717A
Cited
US2327066A
Cited
FR873391A
Cited
FR879903A
Cited
US2437600A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-12-19 | 1953-06-20 | 1953-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-19 | 1957-06-20 | 1957-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-19 | 1961-06-20 | 1961-12-20 | $7700.00 | Window Closed / Lapsed |