US2766231A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Monoazo-dyestuffs
Assignee: BASF Schweiz AG
•
Filing: 1954-01-25
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Granted: 1956-10-09
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Expires: 1974-01-25
Abstract
No abstract record available.
Inventors
- 👤 Bolliger Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:29
CPC Classifications
C; C09; C09B; C09B62/00; C09B62/44; C09B62/62; C09B62/66
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
17 words
A MONOHYDROXY MONOAZO DYESTUFF FREE FROM SULFONIC ACID AND CARBOXYLIC ACID GROUPS, WHICH CORRESPONDS TO THE FORMULA
Claim 2
Dependent Claim
17 words
A MONOHYDROXY MONOAZO DYESTUFF FREE FROM SULFONIC ACID AND CARBOXYLIC ACID GROUPS, WHICH 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) | 1959-10-09 | 1960-04-09 | 1960-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-09 | 1964-04-09 | 1964-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-09 | 1968-04-09 | 1968-10-09 | $7700.00 | Window Closed / Lapsed |