Patent US2724723A successfully refreshed from Google Patents.
US2724723A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of dibasic acids
Assignee: Rayonier Inc
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Filing: 1952-06-02
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Granted: 1955-11-22
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Expires: 1972-06-02
Abstract
No abstract record available.
Inventors
- 👤 Louis H Bock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:00
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/16; C07C51/21; C07C51/23; C07C51/235
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
45 words
THE METHOD OF PRODUCING DIBASIC ACIDS WHICH COMPRISES HEATING IN AQUEOUS SOLUTION, VANILLIN, SODIUM HYDROXIDE AND A COMPOUND HAVING THE FORMULA XRX AT A TEMPEATURE BETWEEN ABOUT 75* C. AND 140* C. FOR A LENGTH OF TIME SUFFICIENT TO FORM A CONPOUND HAVING THE FORMULA
Claim 2
Independent Claim
45 words
THE METHOD OF PRODUCING DIBASIC ACIDS WHICH COMPRISES HEATING IN AQUEOUS SOLUTION, VANILLIN, SODIUM HYDROXIDE AND A COMPOUND HAVING THE FORMULA XRX AT A TEMPEATURE BETWEEN ABOUT 75* C. AND 140* C. FOR A LENGTH OF TIME SUFFICIENT TO FORM A CONPOUND HAVING THE FORMULA
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) | 1958-11-21 | 1959-05-23 | 1959-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-11-21 | 1963-05-23 | 1963-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-11-21 | 1967-05-23 | 1967-11-22 | $7700.00 | Window Closed / Lapsed |