US2692291A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of vanillin from lignin
Assignee: Monsanto Chemicals Ltd
•
Filing: 1950-06-06
•
Granted: 1954-10-19
•
Expires: 1970-06-06
Abstract
No abstract record available.
Inventors
- 👤 Collis C Bryan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:34
CPC Classifications
C; C07; C07C; C07C45/00; C07C45/27; C07C45/32; C07C45/78
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
78 words
IN A PROCESS FOR THE PRODUCTION OF VALUABLE OXIDATION DEGRADATION PRODUCTS FROM A FORM OF LIGNIN WHEREIN A REACTION MIXTURE COMPRISING A STRONGLY ALKALINE AQUEOUS MEDIUM CONTAINING LIGNIN OR A DERIVATIVE OF LIGNIN IS CONTACTED AND REACTED WITH MOLECULAR OXYGEN, THE IMPROVEMENT WHICH COMPRISES THE STEPS OF, DURING THE TIME THE SAID REACTION MIXTURE IS AT REACTING TEMPERATURES, CONTINUOUSLY SUPPLYING SUBSTANTIALLY ALL OF THE OXYGEN FOR THE OXIDATION REACTION BY INTIMATELY CONTACTING SAID REACTION MIXTURE WITH AN OXYGEN-
References Cited (Backward Citations)
US2434626A
Cited
GB607978A
Cited
US2516827A
Cited
US2544999A
Cited
US2576752A
Cited
US2576754A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-10-18 | 1958-04-19 | 1958-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-10-18 | 1962-04-19 | 1962-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-10-18 | 1966-04-19 | 1966-10-19 | $7700.00 | Window Closed / Lapsed |