Patent US2642456A successfully refreshed from Google Patents.
US2642456A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nu-carboxyalkyl-alpha-amino toluic acids and their alkyl esters
Assignee: Monsanto Chemicals Ltd
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Filing: 1950-04-25
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Granted: 1953-06-16
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Expires: 1970-04-25
Abstract
No abstract record available.
Inventors
- 👤 William S Emerson
- 👤 Robert A Heimsch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:07
CPC Classifications
C; C07; C07C; C07C229/00; C07C229/38
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
5 words
COMPOUNDS HAVING THE GENERAL STRUCTURE
Claim 2
Dependent Claim
5 words
COMPOUNDS HAVING THE GENERAL STRUCTURE
Claim 3
Dependent Claim
12 words
THE PROCESS WHICH COMPRISES CONTACTING AN AMINO COMPOUND HAVING THE GENERAL FORMULA
Claim 4
Dependent Claim
12 words
THE PROCESS WHICH COMPRISES CONTACTING AN AMINO COMPOUND HAVING THE GENERAL 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) | 1956-06-15 | 1956-12-15 | 1957-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-15 | 1960-12-15 | 1961-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-15 | 1964-12-15 | 1965-06-16 | $7700.00 | Window Closed / Lapsed |