Patent CA1036799A successfully refreshed from Google Patents.
US3068280A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for production of aromatic carboxylic acids
Assignee: Chemische Werke Witten GmbH
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Filing: 1958-01-23
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Granted: 1962-12-11
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Expires: 1978-01-23
Abstract
No abstract record available.
Inventors
- 👤 Katzschmann Ewald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:53
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/16; C07C51/21; C07C51/255
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
10 words
THE PROCESS OF PRODUCING A TOLUIC ACID OF THE FORMULA
Claim 2
Dependent Claim
10 words
THE PROCESS OF PRODUCING A TOLUIC ACID OF THE FORMULA
References Cited (Backward Citations)
US2497889A
Cited
US2561350A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-12-10 | 1966-06-11 | 1966-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-10 | 1970-06-11 | 1970-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-10 | 1974-06-11 | 1974-12-11 | $7700.00 | Window Closed / Lapsed |