US2816102A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metalliferous azo dyestuffs
Assignee: BASF Schweiz AG
•
Filing: 1954-02-05
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Granted: 1957-12-10
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Expires: 1974-02-05
Abstract
No abstract record available.
Inventors
- 👤 Riat Henri
- 👤 Weber Oscar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:33
CPC Classifications
C; C09; C09B; C09B35/00; C09B35/02; C09B35/039; C09B35/08; C09B62/00; C09B62/44; C09B62/78; C09B62/82; C09B62/835
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
14 words
A METALLIFEROUS AZO DYESTUFF WHICH IN ITS FREE ACID STATE CORRESPONDS TO THE FORMULA
Claim 2
Dependent Claim
14 words
A METALLIFEROUS AZO DYESTUFF WHICH IN ITS FREE ACID STATE CORRESPONDS TO THE FORMULA
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-12-09 | 1961-06-10 | 1961-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-09 | 1965-06-10 | 1965-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-09 | 1969-06-10 | 1969-12-10 | $7700.00 | Window Closed / Lapsed |