US2906747A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pyrazolone-1-carboxylic acid amidine monoazo dyestuffs
Assignee: Bayer AG
•
Filing: 1957-09-24
•
Granted: 1959-09-29
•
Expires: 1977-09-24
Abstract
No abstract record available.
Inventors
- 👤 Wolfrum Gerhard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:12
CPC Classifications
C; C09; C09B; C09B29/00; C09B29/34; C09B29/36; C09B29/3604; C09B29/3647; C09B29/3652; C09B29/366; Y; Y10; Y10S; Y10S8/00; Y10S8/92; Y10S8/927
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
MONOAZO DYESTUFFS CORRESPONDING TO THE FORMULA
Claim 2
Dependent Claim
6 words
MONOAZO DYESTUFFS CORRESPONDING TO THE FORMULA
References Cited (Backward Citations)
US2634262A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-09-28 | 1963-03-30 | 1963-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-28 | 1967-03-30 | 1967-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-28 | 1971-03-30 | 1971-09-29 | $7700.00 | Window Closed / Lapsed |