Patent US2849437A successfully refreshed from Google Patents.
US2849437A
Expired / Lapsed
US
⏱️ 0.0 years remaining
New monoazo dyestuffs
Assignee: BASF Schweiz AG
•
Filing: 1955-12-16
•
Granted: 1958-08-26
•
Expires: 1975-12-16
Abstract
No abstract record available.
Inventors
- 👤 Montmollin Rene De
- 👤 Zollinger Heinrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:27
CPC Classifications
C; C09; C09B; C09B62/00; C09B62/44; C09B62/465; C09B62/47; C09B62/473
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
A MONOAZO DYESTUFF OF THE FORMULA
Claim 2
Dependent Claim
6 words
A MONOAZO DYESTUFF OF 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) | 1961-08-25 | 1962-02-24 | 1962-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-25 | 1966-02-24 | 1966-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-25 | 1970-02-24 | 1970-08-26 | $7700.00 | Window Closed / Lapsed |