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US2931795A
Expired / Lapsed
US
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Monoazo dyestuffs
Assignee: BASF Schweiz AG
•
Filing: 1958-06-27
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Granted: 1960-04-05
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Expires: 1978-06-27
Abstract
No abstract record available.
Inventors
- 👤 Heckendorn Alphonse
- 👤 Fasciati Alfred
- 👤 Zollinger Heinrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:53
CPC Classifications
C; C09; C09B; C09B62/00; C09B62/44; C09B62/465; C09B62/47
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
7 words
A MONOAZO DYESTUFF CORRESPONDING TO THE FORMULA
Claim 2
Dependent Claim
7 words
A MONOAZO DYESTUFF CORRESPONDING 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) | 1963-04-05 | 1963-10-05 | 1964-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-05 | 1967-10-05 | 1968-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-05 | 1971-10-05 | 1972-04-05 | $7700.00 | Window Closed / Lapsed |