US2648678A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of preparing aralkyl carbonates
Assignee: Ohio-Apex Inc
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Filing: 1951-01-13
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Granted: 1953-08-11
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Expires: 1971-01-13
Abstract
No abstract record available.
Inventors
- 👤 Charles Heiberger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:10
CPC Classifications
C; C07; C07C; C07C68/00; C07C68/06; C07C69/00; C07C69/96; C07D; C07D333/00; C07D333/02; C07D333/04; C07D333/26; C07D333/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
37 words
THE PROCESS FOR THE PRODUCTION OF ORGANIC CARBONATES WHICH COMPRISES HEATING AT TEMPERATURES OF ABOUT 50* TO ABOUT 150* C. A SUBSTANTIALLY ANHYDROUS MIXTURE OF CARBONATE OF SODIUM AND A COMPOUND SELECTED FROM THE GROUP CONSISTING OF
Claim 2
Dependent Claim
37 words
THE PROCESS FOR THE PRODUCTION OF ORGANIC CARBONATES WHICH COMPRISES HEATING AT TEMPERATURES OF ABOUT 50* TO ABOUT 150* C. A SUBSTANTIALLY ANHYDROUS MIXTURE OF CARBONATE OF SODIUM AND A COMPOUND SELECTED FROM THE GROUP CONSISTING OF
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-10 | 1957-02-09 | 1957-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-10 | 1961-02-09 | 1961-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-10 | 1965-02-09 | 1965-08-11 | $7700.00 | Window Closed / Lapsed |