US2543544A
Expired / Lapsed
US
⏱️ 0.0 years remaining
N, n-dimethyl-n'-(3-thienylmethyl)-n'-(alpha-pyridyl)-ethylenediamine
Assignee: Indiana University Foundation Inc
•
Filing: 1948-05-08
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Granted: 1951-02-27
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Expires: 1968-05-08
Abstract
No abstract record available.
Inventors
- 👤 Ernest E Campaigne
- 👤 Suer William Monroe Le
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 00:41
CPC Classifications
C; C07; C07D; C07D409/00; C07D409/02; C07D409/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
13 words
N,N-DIMETHYL - N'' - (3-THIENYLMETHYL) -N'' (ALPHA - PYRIDY) -ETHYLENEDIAMINE HAVING THE FORMULA
Claim 2
Dependent Claim
13 words
N,N-DIMETHYL - N'' - (3-THIENYLMETHYL) -N'' (ALPHA - PYRIDY) -ETHYLENEDIAMINE 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) | 1954-02-26 | 1954-08-28 | 1955-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-26 | 1958-08-28 | 1959-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-26 | 1962-08-28 | 1963-02-27 | $7700.00 | Window Closed / Lapsed |