Patent US3320282A successfully refreshed from Google Patents.
US3320282A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing esters of 2-hydroxy-3-(3-indolyl) alkanoic acids
Assignee: Pfizer Inc
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Filing: 1965-02-24
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Granted: 1967-05-16
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Expires: 1985-02-24
Abstract
No abstract record available.
Inventors
- 👤 Wittenau Manfred Schach Von
- 👤 Koe Billie Kenneth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:29
CPC Classifications
C; C07; C07D; C07D413/00; C07D413/02; C07D413/06; C07D209/00; C07D209/02; C07D209/04; C07D209/10; C07D209/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
13 words
A PROCESS FOR THE PRODUCTION OF A COMPOUND OF THE FORMULA: 3-(R-OOC-CH(-OH)-CH(-R3),R1,R6-INDOLE WHEREIN
Claim 2
Dependent Claim
13 words
A PROCESS FOR THE PRODUCTION OF A COMPOUND OF THE FORMULA: 3-(R-OOC-CH(-OH)-CH(-R3),R1,R6-INDOLE WHEREIN
References Cited (Backward Citations)
US3076814A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-05-15 | 1970-11-14 | 1971-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-15 | 1974-11-14 | 1975-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-15 | 1978-11-14 | 1979-05-16 | $7700.00 | Window Closed / Lapsed |