US3082216A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of 4, 4-disubstituted 5-alkylidene-1, 3-dioxolane-2-ones
Assignee: BASF SE
•
Filing: 1960-09-27
•
Granted: 1963-03-19
•
Expires: 1980-09-27
Abstract
No abstract record available.
Inventors
- 👤 Dimroth Peter
- 👤 Pasedach Heinrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:33
CPC Classifications
C; C07; C07C; C07C29/00; C07C29/36; C07C29/38; C07C29/42
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
2 words
4,4-DIMETHYL-5-METHYLENE-1, 3-DIOXOLANE-2-ONE.
Claim 2
Dependent Claim
5 words
A COMPOUND OF THE FORMULA
References Cited (Backward Citations)
US2563771A
Cited
US2873282A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-03-18 | 1966-09-17 | 1967-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-03-18 | 1970-09-17 | 1971-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-03-18 | 1974-09-17 | 1975-03-19 | $7700.00 | Window Closed / Lapsed |