US2683172A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aminophenyl ureas
Assignee: Ethyl Corp
•
Filing: 1952-01-14
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Granted: 1954-07-06
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Expires: 1972-01-14
Abstract
No abstract record available.
Inventors
- 👤 Eugene F Hill
- 👤 Pree David O De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:44
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/22; C10L1/222; C10L1/2227; C07; C07C; C07C275/00; C07C275/28; C07C275/40; C08; C08K; C08K5/00; C08K5/16; C08K5/21; C10M; C10M1/00; C10M1/08; C10M2215/00; C10M2215/10; C10M2215/102; Y; Y10; Y10S; Y10S524/00; Y10S524/925; Y10S524/929
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
10 words
AS NEW COMPOSITION OF MATTER, COMPOUNDS HAVING THE GENERAL 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) | 1957-07-05 | 1958-01-04 | 1958-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-07-05 | 1962-01-04 | 1962-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-07-05 | 1966-01-04 | 1966-07-06 | $7700.00 | Window Closed / Lapsed |