US2696486A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Disazo-dyestuffs
Assignee: BASF Schweiz AG
•
Filing: 1952-01-28
•
Granted: 1954-12-07
•
Expires: 1972-01-28
Abstract
No abstract record available.
Inventors
- 👤 Gunst Raymond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:30
CPC Classifications
C; C09; C09B; C09B43/00; C09B43/12; C09B43/136; C09B43/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
A DISAZO DYESTUFF OF THE FORMULA
Claim 2
Dependent Claim
6 words
A DISAZO DYESTUFF OF THE FORMULA
References Cited (Backward Citations)
US2387997A
Cited
US2460618A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-12-06 | 1958-06-07 | 1958-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-12-06 | 1962-06-07 | 1962-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-12-06 | 1966-06-07 | 1966-12-07 | $7700.00 | Window Closed / Lapsed |