Patent US2882277A successfully refreshed from Google Patents.
US2882277A
Expired / Lapsed
US
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Asymmetrical indigoid dyestuffs
Assignee: BASF Schweiz AG
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Filing: 1957-01-08
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Granted: 1959-04-14
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Expires: 1977-01-08
Abstract
No abstract record available.
Inventors
- 👤 Mueller Jakob
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:20
CPC Classifications
C; C09; C09B; C09B7/00; C09B7/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
8 words
ASYMMETRICAL INDIGOID VAT DYESTUFFS OF THE FORM A
Claim 2
Dependent Claim
8 words
ASYMMETRICAL INDIGOID VAT DYESTUFFS OF THE FORM A
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) | 1962-04-13 | 1962-10-13 | 1963-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-13 | 1966-10-13 | 1967-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-13 | 1970-10-13 | 1971-04-14 | $7700.00 | Window Closed / Lapsed |