Patent US4036152A successfully refreshed from Google Patents.
Patent US2371682A successfully refreshed from Google Patents.
Patent US3333004A successfully refreshed from Google Patents.
US3333004A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of glyoxal
Assignee: BASF SE
•
Filing: 1963-07-11
•
Granted: 1967-07-25
•
Expires: 1983-07-11
Abstract
No abstract record available.
Inventors
- 👤 Platz Rolf
- 👤 Fuchs Werner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:00
CPC Classifications
C; C07; C07C; C07C45/00; C07C45/27; C07C45/28; C07C45/32; C07C45/33; C07C45/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
A PROCESS FOR THE PRODUCTION OF GLYOXAL WHICH COMPRISES REACTING ETHYLENE WITH NITRIC ACID IN AQUEOUS MEDIUM IN THE PRESENCE OF A PALLADIUM SALT AS CATALYST AT A TEMPERATURE BETWEEN 0* AND 100*C., THE CONCENTRATION OF THE NITRIC ACID IN THE REACTION MIXTURE BEING BETWEEN 1 AND 40% BY WEIGHT AND THE AMOUNT OF PALLADIUM SALT BEING MORE THAN 0.0001% BY WEIGHT WITH REFERENCE TO THE REACTION MIXTURE.
Claim 2
Dependent Claim
68 words
A PROCESS FOR THE PRODUCTION OF GLYOXAL WHICH COMPRISES REACTING ETHYLENE WITH NITRIC ACID IN AQUEOUS MEDIUM IN THE PRESENCE OF A PALLADIUM SALT AS CATALYST AT A TEMPERATURE BETWEEN 0* AND 100*C., THE CONCENTRATION OF THE NITRIC ACID IN THE REACTION MIXTURE BEING BETWEEN 1 AND 40% BY WEIGHT AND THE AMOUNT OF PALLADIUM SALT BEING MORE THAN 0.0001% BY WEIGHT WITH REFERENCE TO THE REACTION MIXTURE.
References Cited (Backward Citations)
GB886157A
Cited
US3119875A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-07-24 | 1971-01-23 | 1971-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-24 | 1975-01-23 | 1975-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-24 | 1979-01-23 | 1979-07-25 | $7700.00 | Window Closed / Lapsed |