US2845419A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxadiazole compounds
Assignee: BASF Schweiz AG
•
Filing: 1956-02-06
•
Granted: 1958-07-29
•
Expires: 1976-02-06
Abstract
No abstract record available.
Inventors
- 👤 Siegrist Adolf Emil
- 👤 Ackermann Franz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:39
CPC Classifications
C; C07; C07D; C07D413/00; C07D413/14
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
16 words
A FLUORESCENT, PRACTICALLY UNCOLORED COMPOUND WHICH IS FREE FROM HYDROXYL GROUPS AND CORRESPONS TO THE FORMULA
Claim 2
Dependent Claim
16 words
A FLUORESCENT, PRACTICALLY UNCOLORED COMPOUND WHICH IS FREE FROM HYDROXYL GROUPS AND CORRESPONS TO THE FORMULA
Claim 3
Dependent Claim
15 words
A FLUORESCENT, PRACTICALLY UNCOLORED COMPOUND WHICH IS ITS FREE ACID STATE CORRESPONDS TO THE FORMULA
Claim 4
Dependent Claim
15 words
A FLUORESCENT, PRACTICALLY UNCOLORED COMPOUND WHICH IS ITS FREE ACID STATE CORRESPONDS TO THE 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) | 1961-07-28 | 1962-01-27 | 1962-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-28 | 1966-01-27 | 1966-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-28 | 1970-01-27 | 1970-07-29 | $7700.00 | Window Closed / Lapsed |