US3278516A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water-soluble azo dyestuffs
Assignee: Hoechst AG
•
Filing: 1964-11-24
•
Granted: 1966-10-11
•
Expires: 1984-11-24
Abstract
No abstract record available.
Inventors
- 👤 Scherer Otto
- 👤 Uhl Klaus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:47
CPC Classifications
C; C09; C09B; C09B39/00; C09B62/00; C09B62/44; C09B62/485; C09B62/489
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
7 words
A WATER-SOLUBLE AZO DRESTUFF OF THE FORMULA
Claim 2
Dependent Claim
7 words
A WATER-SOLUBLE AZO DRESTUFF OF THE FORMULA
References Cited (Backward Citations)
US2700686A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-10 | 1970-04-11 | 1970-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-10 | 1974-04-11 | 1974-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-10 | 1978-04-11 | 1978-10-11 | $7700.00 | Window Closed / Lapsed |