Patent US2655526A successfully refreshed from Google Patents.
US2655526A
Expired / Lapsed
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Preparation of mono-alkyl or-aralkyl cyanoacetic acid esters
Assignee: Merck and Co Inc
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Filing: 1949-03-01
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Granted: 1953-10-13
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Expires: 1969-03-01
Abstract
No abstract record available.
Inventors
- 👤 Arthur C Cope
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:31
CPC Classifications
C; C07; C07C; C07C255/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
35 words
THE PROCESS OF PRODUCING A MEMBER OF THE GROUP CONSISTING OF MONO-ALKYL AND -ARALKYL CYANOACETIC ALKYL AND ARALKYL ESTERS, WHICH PROCESS COMPRISES HAVING TOGETHER IN A REACTION MIXUTURE (A) A CARBONYL COMPOUND OF THE FORMULA
Claim 2
Dependent Claim
35 words
THE PROCESS OF PRODUCING A MEMBER OF THE GROUP CONSISTING OF MONO-ALKYL AND -ARALKYL CYANOACETIC ALKYL AND ARALKYL ESTERS, WHICH PROCESS COMPRISES HAVING TOGETHER IN A REACTION MIXUTURE (A) A CARBONYL COMPOUND OF THE FORMULA
References Cited (Backward Citations)
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Cited
US2093519A
Cited
US2176018A
Cited
US2150154A
Cited
US2298284A
Cited
US2468352A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-10-12 | 1957-04-13 | 1957-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-10-12 | 1961-04-13 | 1961-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-10-12 | 1965-04-13 | 1965-10-13 | $7700.00 | Window Closed / Lapsed |