US2873282A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalytic process for producing alkylene carbonates
Assignee: Jefferson Chemical Co Inc
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Filing: 1952-04-05
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Granted: 1959-02-10
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Expires: 1972-04-05
Abstract
No abstract record available.
Inventors
- 👤 Paul P Mcclellan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 01:17
CPC Classifications
C; C07; C07D; C07D317/00; C07D317/08; C07D317/10; C07D317/32; C07D317/34; C07D317/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
22 words
A PROCESS FOR THE MANUFACTURE OF AN ALKYLENE CARBONATE WHICH COMPRISES REACTING AN ALKYLENE OXIDE OF THE OXIRANE SYSTEM HAVING THE FORMULA
Claim 2
Dependent Claim
22 words
A PROCESS FOR THE MANUFACTURE OF AN ALKYLENE CARBONATE WHICH COMPRISES REACTING AN ALKYLENE OXIDE OF THE OXIRANE SYSTEM HAVING THE 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) | 1962-02-09 | 1962-08-11 | 1963-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-09 | 1966-08-11 | 1967-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-09 | 1970-08-11 | 1971-02-10 | $7700.00 | Window Closed / Lapsed |