US2811530A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of indole
Assignee: —
•
Filing: —
•
Granted: 1957-10-29
•
Expires: 1974-10-29
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:11
CPC Classifications
C; C07; C07D; C07D209/00; C07D209/02; C07D209/04; C07D209/30; C07D209/42; C07D209/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
9 words
PROCESS FOR PREPARING AN INDOLE OF THE GENERAL FORMULA:
Claim 2
Dependent Claim
9 words
PROCESS FOR PREPARING AN INDOLE OF THE GENERAL FORMULA:
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-10-28 | 1961-04-29 | 1961-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-28 | 1965-04-29 | 1965-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-28 | 1969-04-29 | 1969-10-29 | $7700.00 | Window Closed / Lapsed |