US3235540A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metallized azaporphine pyrazolone monoazo dyestuffs
Assignee: Bayer AG
•
Filing: 1962-03-12
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Granted: 1966-02-15
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Expires: 1982-03-12
Abstract
No abstract record available.
Inventors
- 👤 Dortmann Heinz-Adolf
- 👤 Schmitz Peter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:41
CPC Classifications
C; C09; C09B; C09B62/00; C09B62/002; C09B62/006; C09B62/0068; C09B47/00; C09B47/04; C09B47/08; C09B56/00; C09B56/14; C09B62/44; C09B62/443
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
21 words
DYESTUFFS SELECTED FROM THE CLASS CONSISTING OF THE CHROMIUM AND COBALT COMPLEX COMPOUND OF AN AZO DY STUFF OF THE FORMULA
Claim 2
Dependent Claim
21 words
DYESTUFFS SELECTED FROM THE CLASS CONSISTING OF THE CHROMIUM AND COBALT COMPLEX COMPOUND OF AN AZO DY STUFF OF THE FORMULA
References Cited (Backward Citations)
US3013006A
Cited
FR1256707A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-02-14 | 1969-08-16 | 1970-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-14 | 1973-08-16 | 1974-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-14 | 1977-08-16 | 1978-02-15 | $7700.00 | Window Closed / Lapsed |