Patent US6522511B1 successfully refreshed from Google Patents.
Patent US3257420A successfully refreshed from Google Patents.
US3257420A
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Carboxylic acids alpha-substituted by at least one cyclic radical
Assignee: Merck Sante SAS
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Filing: 1962-02-21
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Granted: 1966-06-21
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Expires: 1982-02-21
Abstract
No abstract record available.
Inventors
- 👤 Szarvasi Etienne
- 👤 Neuvy Liliane
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:10
CPC Classifications
C; C07; C07C; C07C255/00; C07C51/00; C07C51/08; C07C51/41; C07C51/412; C07C51/58; C07C51/60; C07C57/00; C07C57/30; C07C57/42; C07D; C07D307/00; C07D307/02; C07D307/04; C07D307/10; C07D307/16; C07D307/34; C07D307/38; C07D307/54
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
5 words
A COMPOUND OF THE FORMULA
Claim 2
Dependent Claim
5 words
A COMPOUND OF THE FORMULA
Claim 3
Dependent Claim
12 words
AN ESTER OF A COMPOUND ACCORDING TO CLAIM 1 OF THE FORMULA
References Cited (Backward Citations)
US2841594A
Cited
US2937117A
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US2843607A
Cited
US2834789A
Cited
US3057777A
Cited
US3013023A
Cited
US3060198A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-06-20 | 1969-12-20 | 1970-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-20 | 1973-12-20 | 1974-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-20 | 1977-12-20 | 1978-06-21 | $7700.00 | Window Closed / Lapsed |