US3393136A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of oxalates
Assignee: Union Oil Company of California
•
Filing: 1965-09-28
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Granted: 1968-07-16
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Expires: 1985-09-28
Abstract
No abstract record available.
Inventors
- 👤 Donald M Fenton
- 👤 Paul J Steinwand
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:40
CPC Classifications
C; C07; C07C; C07C67/00; C07C67/36
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
123 words
THE ELECTROLYTIC OXIDATIVE CARBONYLATION FOR THE CONTINUOUS OXIDATION OF CARBON MONOXIDE TO AN ESTER OF OXALIC ACID THAT COMPRISES: CONTACTING, IN THE ANODE CHAMBER OF AN ELECTROLYTIC CELL HAVING ANODE AND CATHODE CHAMBERS SEPARATED BY A POROUS DISPHRAGM, CARBON MONOXIDE WITH AN ANHYDROUS ANOLYTE COMPRISING A MONOHYDROXY ALCOHOL HAVING FROM 1 TO ABOUT 20 CARBONS AND CONTAINING A SOLUBLE SALT OF A PLATINUM GROUP METAL AND A REDOX SALT SELECTED FROM THE CLASS CONSISTING OF SOLUBLE CUPRIC AND FERRIC SALTS; MAINTAINING THE TEMPERATURE OF THE ANOLYTE BETWEEN ABOUT 30* AND 300*C.; AND MAINTAINING THE PRESSURE IN SAID ANODE CHAMBER BETWEEN ABOUT 5 AND 700 ATOMSPHERES; WHILE APPLYING A DIRECT CURRENT VOLTAGE TO SAID CELL TO MAINTAIN SAID RDOX SALT IN TIS OXIDIZED STATE.
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) | 1971-07-16 | 1972-01-15 | 1972-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-16 | 1976-01-15 | 1976-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-16 | 1980-01-15 | 1980-07-16 | $7700.00 | Window Closed / Lapsed |