US2779766A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pyrroles having amino, cyano, and mercapto or substituted mercapto groups and their preparation
Assignee: EIDP Inc
•
Filing: 1955-04-20
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Granted: 1957-01-29
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Expires: 1975-04-20
Abstract
No abstract record available.
Inventors
- 👤 William J Middleton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:32
CPC Classifications
C; C07; C07D; C07D207/00; C07D207/02; C07D207/30; C07D207/34; C07D207/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
A SUBSTITUTED PYRROLE HAVING THE FORMULA
Claim 2
Dependent Claim
6 words
A SUBSTITUTED PYRROLE HAVING THE 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) | 1960-01-29 | 1960-07-30 | 1961-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-29 | 1964-07-30 | 1965-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-29 | 1968-07-30 | 1969-01-29 | $7700.00 | Window Closed / Lapsed |