US2784201A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of making alkylene carbonates
Assignee: Union Carbide Corp
•
Filing: 1953-08-11
•
Granted: 1957-03-05
•
Expires: 1973-08-11
Abstract
No abstract record available.
Inventors
- 👤 Henry C Chitwood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:18
CPC Classifications
C; C07; C07D; C07D317/00; C07D317/08; C07D317/10; C07D317/32; C07D317/34; C07D317/36; C07D317/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
39 words
PROCESS FOR MAKING ALKYLENE CARBONATES WHICH COMPRISES HEATING AN ALKALI METAL LOWER ALKYL CARBONATE WITH A LOWER ALPHA, BETA-ALKYLENE CHLORHYDRIN, AND DISTILLING FROM THE REACTION MIXTURE AN ALKANOL CORRESPONDING TO THE ALKYL GROUP OF SAID ALKALI METAL ALKYL CARBONATE.
Claim 2
Dependent Claim
39 words
PROCESS FOR MAKING ALKYLENE CARBONATES WHICH COMPRISES HEATING AN ALKALI METAL LOWER ALKYL CARBONATE WITH A LOWER ALPHA, BETA-ALKYLENE CHLORHYDRIN, AND DISTILLING FROM THE REACTION MIXTURE AN ALKANOL CORRESPONDING TO THE ALKYL GROUP OF SAID ALKALI METAL ALKYL CARBONATE.
References Cited (Backward Citations)
US1907891A
Cited
DE516281C
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-03-04 | 1960-09-03 | 1961-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-03-04 | 1964-09-03 | 1965-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-03-04 | 1968-09-03 | 1969-03-05 | $7700.00 | Window Closed / Lapsed |