US2552591A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aromatic acid synthesis
Assignee: Individual
•
Filing: 1945-12-13
•
Granted: 1951-05-15
•
Expires: 1965-12-13
Abstract
No abstract record available.
Inventors
- 👤 Walter H C Rueggeberg
- 👤 Russell K Frantz
- 👤 Ginsburg Abram
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:28
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
49 words
A PROCESS FOR THE PRODUCTION OF AROMATIC ACIDS, SAID PROCESS COMPRISING REACTING, UNDER WATER-FREE AND CARBON SULFIDE-FREE CONDITIONS, AN AROMATIC COMPOUND HAVING AT LEAST ONE SUBSTITUTED RING CARBON WITH ALUMINUM CHLORIDE AND LIQUID PHOSGENE IN A REACTION MEDIUM FREE FROM ANY OTHER SOLVENTS AND THEREAFTER HYDROLYZING THE REACTION PRODUCT.
Claim 2
Dependent Claim
49 words
A PROCESS FOR THE PRODUCTION OF AROMATIC ACIDS, SAID PROCESS COMPRISING REACTING, UNDER WATER-FREE AND CARBON SULFIDE-FREE CONDITIONS, AN AROMATIC COMPOUND HAVING AT LEAST ONE SUBSTITUTED RING CARBON WITH ALUMINUM CHLORIDE AND LIQUID PHOSGENE IN A REACTION MEDIUM FREE FROM ANY OTHER SOLVENTS AND THEREAFTER HYDROLYZING THE REACTION PRODUCT.
References Cited (Backward Citations)
US1542264A
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 |