US3155683A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of aromatic cyclic carbonates
Assignee: General Electric Co
•
Filing: 1963-06-03
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Granted: 1964-11-03
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Expires: 1983-06-03
Abstract
No abstract record available.
Inventors
- 👤 Leroy S Moody
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:25
CPC Classifications
C; C08; C08G; C08G64/00; C08G64/04; C08G64/06; C07; C07D; C07D321/00; C07D321/12; C07D323/00; C08G64/20; C08G64/22; C08G64/26; C08G64/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
37 words
A PROCESS FOR PREPARING A CYCLIC AROMATIC CARBONATE WHICH COMPRISES REACTING TOGETHER IN AN INERT ORGANIC SOLVENT CONTAINING AN ACID ACCEPTOR, AND AS THE SOLE REACTIVE INGREDIENTS, WATER AND A BISHALOFORMATE SELECTED FROM THE CLASS CONSISTING OF
Claim 2
Dependent Claim
37 words
A PROCESS FOR PREPARING A CYCLIC AROMATIC CARBONATE WHICH COMPRISES REACTING TOGETHER IN AN INERT ORGANIC SOLVENT CONTAINING AN ACID ACCEPTOR, AND AS THE SOLE REACTIVE INGREDIENTS, WATER AND A BISHALOFORMATE SELECTED FROM THE CLASS CONSISTING OF
References Cited (Backward Citations)
GB772627A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-11-03 | 1968-05-04 | 1968-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-03 | 1972-05-04 | 1972-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-03 | 1976-05-04 | 1976-11-03 | $7700.00 | Window Closed / Lapsed |