US2855441A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diynic acetals
Assignee: Individual
•
Filing: 1953-07-06
•
Granted: 1958-10-07
•
Expires: 1973-07-06
Abstract
No abstract record available.
Inventors
- 👤 Sondheimer Franz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:23
CPC Classifications
C; C07; C07C; C07C47/00; C07C47/20; C07C47/222; C07C1/00; C07C1/32; C07C1/325; C07C1/328; C07C45/00; C07C45/51; C07C45/511; C07C45/515; C07C47/21
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
8 words
A NEW DIETHYL ACETAL HAVING THE FOLLOWING FORMULA:
Claim 2
Dependent Claim
8 words
A NEW DIETHYL ACETAL HAVING THE FOLLOWING FORMULA:
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) | 1961-10-06 | 1962-04-07 | 1962-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-06 | 1966-04-07 | 1966-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-06 | 1970-04-07 | 1970-10-07 | $7700.00 | Window Closed / Lapsed |