US2650933A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Higher alkyl 4-hydroxy-3-ethoxybenzoate and process for making same
Assignee: Lawrence University
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Filing: 1952-03-08
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Granted: 1953-09-01
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Expires: 1972-03-08
Abstract
No abstract record available.
Inventors
- 👤 Irwin A Pearl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:37
CPC Classifications
C; C07; C07C; C07C257/00; C07C257/04; C07C257/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
43 words
THE PROCESS FOR PRODUCING AN ACID SALT OF 4HYDROXY-3-ETHOXYBENZIMIDATE WHICH COMPRISES THE STEPS OF REACTING 4-HYDROXY-3-ETHOXYBENZONITRILE WITH AN ALKYL ALCOHOL CONTAINING FROM EIGHT TO TEN CARBON ATOMS IN THE PRESENCE OF AN ANHYDROUS ACID AND UNDER ANHYDROUS CONDITIONS WHILE PREVENTING NITRATION AND DEMETHYLATION.
Claim 2
Dependent Claim
16 words
A 4-HYDROXY-3-ETHOXYALKYLBENZIMIDATE ACID SALT IN WHICH THE ALKYL CONSTITUENT CONTAINS FROM EIGHT TO TEN CARBON ATOMS.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-31 | 1957-03-02 | 1957-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-31 | 1961-03-02 | 1961-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-31 | 1965-03-02 | 1965-09-01 | $7700.00 | Window Closed / Lapsed |