US2938895A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metalliferous disazo dyestuffs containing heavy metal in complex union and a reactive triazine nucleus
Assignee: BASF Schweiz AG
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Filing: 1958-10-06
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Granted: 1960-05-31
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Expires: 1978-10-06
Abstract
No abstract record available.
Inventors
- 👤 Oesterlein Fritz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:32
CPC Classifications
C; C09; C09B; C09B62/00; C09B62/02; C09B62/04; C09B62/08; C09B62/095
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
11 words
A WATER-SOLUBLE METAL COMPLEX COMPOUND OF A DISAZO-DYESTUFF OF THE FORMULA
Claim 2
Dependent Claim
11 words
A WATER-SOLUBLE METAL COMPLEX COMPOUND OF A DISAZO-DYESTUFF OF THE FORMULA
References Cited (Backward Citations)
US2780619A
Cited
US2860128A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-31 | 1963-11-30 | 1964-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-31 | 1967-11-30 | 1968-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-31 | 1971-11-30 | 1972-05-31 | $7700.00 | Window Closed / Lapsed |