US2835660A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyazo dyestuffs
Assignee: BASF SE
•
Filing: 1955-08-30
•
Granted: 1958-05-20
•
Expires: 1975-08-30
Abstract
No abstract record available.
Inventors
- 👤 Baumann Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:26
CPC Classifications
C; C09; C09B; C09B45/00; C09B45/02; C09B45/24; C09B35/00; C09B35/50; C09B35/52
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
15 words
A MEMBER SELECTED FROM THE CLASS CONSISTING OF A POLYAZO DYESTUFF OF THE GENERAL FORMULA
Claim 2
Dependent Claim
15 words
A MEMBER SELECTED FROM THE CLASS CONSISTING OF A POLYAZO DYESTUFF OF THE GENERAL 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) | 1961-05-19 | 1961-11-18 | 1962-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-19 | 1965-11-18 | 1966-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-19 | 1969-11-18 | 1970-05-20 | $7700.00 | Window Closed / Lapsed |