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US2744930A
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N, n-diphenyl-n'-aminoalkylene-urea derivatives
Assignee: Olin Corp
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Filing: 1954-08-04
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Granted: 1956-05-08
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Expires: 1974-08-04
Abstract
No abstract record available.
Inventors
- 👤 Krapcho John
- 👤 William A Lott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:32
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/04; C07D295/12; C07D295/125; C07D295/13; C07C; C07C275/00; C07C275/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
12 words
COMPOUNDS OF THE CLASS CONSISTING OF: FREE BASES HAVING THE GENERAL FORMULA:
Claim 2
Dependent Claim
12 words
COMPOUNDS OF THE CLASS CONSISTING OF: FREE BASES HAVING THE GENERAL FORMULA:
References Cited (Backward Citations)
US2681929A
Cited
US2673878A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-05-08 | 1959-11-07 | 1960-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-08 | 1963-11-07 | 1964-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-08 | 1967-11-07 | 1968-05-08 | $7700.00 | Window Closed / Lapsed |