US2572067A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Trifluoromethyl diphenylamines
Assignee: Individual
•
Filing: 1950-10-30
•
Granted: 1951-10-23
•
Expires: 1970-10-30
Abstract
No abstract record available.
Inventors
- 👤 Nathan L Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:31
CPC Classifications
C; C07; C07C; C07C211/00; C07C211/43; C07C211/54
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
7 words
A TRIFLUOROMETHYL DIPHENYLAMINE OF THE GENERAL FORMULA:
Claim 2
Dependent Claim
7 words
A TRIFLUOROMETHYL DIPHENYLAMINE OF THE GENERAL FORMULA:
References Cited (Backward Citations)
US2212825A
Cited
US2432393A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-10-22 | 1955-04-23 | 1955-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-10-22 | 1959-04-23 | 1959-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-10-22 | 1963-04-23 | 1963-10-23 | $7700.00 | Window Closed / Lapsed |