US3379736A
Expired / Lapsed
US
⏱️ 0.0 years remaining
2-substituted-4-methylene-1, 3-dioxolanes and process therefor
Assignee: Olin Corp
•
Filing: 1965-06-28
•
Granted: 1968-04-23
•
Expires: 1985-06-28
Abstract
No abstract record available.
Inventors
- 👤 Heinz J Dietrich
- 👤 Robert J Raynor
- 👤 Joseph V Karabinos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:19
CPC Classifications
C; C07; C07D; C07D317/00; C07D317/08; C07D317/10; C07D317/14; C07D317/16; C08; C08F; C08F24/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
21 words
2 - SUBSTITUTED - 4 - METHYLENE - 1,3 - DIOXOLANES SELECTED FROM THE CLASS CONSISTING OF COMPOUNDS HAVING THE FORMULA
Claim 2
Dependent Claim
21 words
2 - SUBSTITUTED - 4 - METHYLENE - 1,3 - DIOXOLANES SELECTED FROM THE CLASS CONSISTING OF COMPOUNDS HAVING THE FORMULA
Claim 3
Dependent Claim
8 words
A PROCESS FOR PREPARING 4-METHYLENE-1,3-DIOXOLANES OF THE FORMULA
Claim 4
Dependent Claim
8 words
A PROCESS FOR PREPARING 4-METHYLENE-1,3-DIOXOLANES OF THE FORMULA
References Cited (Backward Citations)
US2415638A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-04-23 | 1971-10-23 | 1972-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-23 | 1975-10-23 | 1976-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-23 | 1979-10-23 | 1980-04-23 | $7700.00 | Window Closed / Lapsed |