US2670376A
Expired / Lapsed
US
⏱️ 0.0 years remaining
N-alpha-naphthyl n, n' n,'-trialkylethylene diamines
Assignee: Nepera Chemical Co Inc
•
Filing: 1951-10-16
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Granted: 1954-02-23
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Expires: 1971-10-16
Abstract
No abstract record available.
Inventors
- 👤 John V Scudi
- 👤 Godfrey F Grail
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:46
CPC Classifications
C; C10; C10M; C10M133/00; C10M133/02; C10M133/04; C10M133/12; C07; C07C; C07C209/00; C07C209/04; C07C209/68; C07C217/00; C07C217/02; C07C217/04; C07C217/06; C07C217/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
12 words
COMPOUNDS OF THE GROUP CONSISTING OF ALPHANAPHTHYL, TRI-ALKYLETHYLENEDIAMINES OF THE GENERAL FORMULA:
Claim 2
Dependent Claim
12 words
COMPOUNDS OF THE GROUP CONSISTING OF ALPHANAPHTHYL, TRI-ALKYLETHYLENEDIAMINES OF THE GENERAL FORMULA:
References Cited (Backward Citations)
US1757394A
Cited
US2151149A
Cited
US2121619A
Cited
US2494355A
Cited
US2430722A
Cited
US2457048A
Cited
US2536750A
Cited
US2627491A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-02-22 | 1957-08-24 | 1958-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-22 | 1961-08-24 | 1962-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-22 | 1965-08-24 | 1966-02-23 | $7700.00 | Window Closed / Lapsed |