US2608581A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of n-(3, 4-dialkoxyphenylacetyl)-3', 4'-dialkoxyphenalkylamines
Assignee: Monsanto Chemicals Ltd
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Filing: 1949-12-30
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Granted: 1952-08-26
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Expires: 1969-12-30
Abstract
No abstract record available.
Inventors
- 👤 Ferdinand B Zienty
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:48
CPC Classifications
C; C07; C07C; C07C233/00; C07C233/01; C07C233/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
15 words
IN A PROCESS OF THE PREPARATION OF N-(3,4DIALKOXYPHENYLACETYL) - 3'',4'' - DIALKOXYPHENALKYLAMINES HAVING THE FORMULA
Claim 2
Dependent Claim
15 words
IN A PROCESS OF THE PREPARATION OF N-(3,4DIALKOXYPHENYLACETYL) - 3'',4'' - DIALKOXYPHENALKYLAMINES 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) | 1955-08-26 | 1956-02-25 | 1956-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-08-26 | 1960-02-25 | 1960-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-08-26 | 1964-02-25 | 1964-08-26 | $7700.00 | Window Closed / Lapsed |