US2574155A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Substituted amino-nitroheterocycles and methods of preparing the same
Assignee: Wyeth Holdings LLC
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Filing: 1950-03-30
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Granted: 1951-11-06
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Expires: 1970-03-30
Abstract
No abstract record available.
Inventors
- 👤 Robert P Parker
- 👤 John S Webb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:50
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/60; C07D213/72; C07D213/76; C07D239/00; C07D239/02; C07D239/24; C07D239/28; C07D239/32; C07D239/42; C07D277/00; C07D277/02; C07D277/20; C07D277/32; C07D277/58; C07F; C07F9/00; C07F9/02; C07F9/547; C07F9/645; C07F9/6509; C07F9/6512; C07F9/6536; C07F9/6539
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
11 words
COMPOUNDS OF THE GROUP CONSISTING OF THOSE HAVING THE GENERAL FORMULAS:
Claim 2
Dependent Claim
11 words
COMPOUNDS OF THE GROUP CONSISTING OF THOSE HAVING THE GENERAL FORMULAS:
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) | 1954-11-05 | 1955-05-07 | 1955-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-11-05 | 1959-05-07 | 1959-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-11-05 | 1963-05-07 | 1963-11-06 | $7700.00 | Window Closed / Lapsed |