US2836587A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metallizable monoazo-dyestuffs and complex metal compounds
Assignee: BASF Schweiz AG
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Filing: 1955-10-17
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Granted: 1958-05-27
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Expires: 1975-10-17
Abstract
No abstract record available.
Inventors
- 👤 Buehler Arthur
- 👤 Zickendraht Christian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:16
CPC Classifications
C; C09; C09B; C09B45/00; C09B45/02; C09B45/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
23 words
A DYESTUFF SELECTED FROM THE CLASS CONSISTING OF A MONOAZO DYESTUFF FREE FROM SULFONIC AND CARBOXYLIC ACID GROUPS AND CORRESPONDING TO THE FORMULA
Claim 2
Dependent Claim
23 words
A DYESTUFF SELECTED FROM THE CLASS CONSISTING OF A MONOAZO DYESTUFF FREE FROM SULFONIC AND CARBOXYLIC ACID GROUPS AND 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) | 1961-05-26 | 1961-11-25 | 1962-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-26 | 1965-11-25 | 1966-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-26 | 1969-11-25 | 1970-05-27 | $7700.00 | Window Closed / Lapsed |