US2553146A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of vanillic acid
Assignee: Sulphite Products Corp
•
Filing: 1946-09-13
•
Granted: 1951-05-15
•
Expires: 1966-09-13
Abstract
No abstract record available.
Inventors
- 👤 Irwin A Pearl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:19
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
53 words
THE PROCESS OF PRODUCING EQUIVALENT QUANTITIES OF VANILLIC ACID AND A POLYMER OF VANILLYL ALCOHOL WHICH COMPRISES SUBJECTING VANILLIN TO THE ACTION OF AN AQUEOUS REACTION MIXTURE MADE UP OF STRONG CAUSTIC ALKALI AND FINELY DIVIDED METALLIC SILVER, ACIDIFYING THE REACTION MIXTURE AND RECOVERING THE VANILLIC ACID AND THE POLYMER OF VANILLYL ALCOHOL.
Claim 2
Dependent Claim
53 words
THE PROCESS OF PRODUCING EQUIVALENT QUANTITIES OF VANILLIC ACID AND A POLYMER OF VANILLYL ALCOHOL WHICH COMPRISES SUBJECTING VANILLIN TO THE ACTION OF AN AQUEOUS REACTION MIXTURE MADE UP OF STRONG CAUSTIC ALKALI AND FINELY DIVIDED METALLIC SILVER, ACIDIFYING THE REACTION MIXTURE AND RECOVERING THE VANILLIC ACID AND THE POLYMER OF VANILLYL ALCOHOL.
References Cited (Backward Citations)
US2419158A
Cited
US2414120A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-14 | 1954-11-13 | 1955-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-14 | 1958-11-13 | 1959-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-14 | 1962-11-13 | 1963-05-15 | $7700.00 | Window Closed / Lapsed |