US3185696A
Expired / Lapsed
US
⏱️ 0.0 years remaining
3', 6'-diaminofluoran derivatives of gamma-lactam
Assignee: Individual
•
Filing: 1962-03-14
•
Granted: 1965-05-25
•
Expires: 1982-03-14
Abstract
No abstract record available.
Inventors
- 👤 Jack M Tien
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:56
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/124; B41M5/132; B41M5/136; B41M5/145; B41M5/26; B41M5/30; B41M5/323; B41M5/327; B41M5/3275; B41M5/1455
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
5 words
A COMPOUND OF THE FORMULA
Claim 2
Dependent Claim
5 words
A COMPOUND OF THE FORMULA
Claim 3
Dependent Claim
17 words
THE COMPOUND OF CLAIM 1 IN WHICH B IS DICHLOROO-PHENYLENE, ARYL IS P-ETHOXYPHEYNL AND R IS NHCOPYRIDYL.
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) | 1968-05-24 | 1968-11-23 | 1969-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-05-24 | 1972-11-23 | 1973-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-05-24 | 1976-11-23 | 1977-05-25 | $7700.00 | Window Closed / Lapsed |