Patent US3384638A successfully refreshed from Google Patents.
US3384638A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anthraquinone vat dyestuffs
Assignee: Cassella Farbwerke Mainkur AG
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Filing: 1966-02-15
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Granted: 1968-05-21
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Expires: 1986-02-15
Abstract
No abstract record available.
Inventors
- 👤 Mix Konrad
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:57
CPC Classifications
C; C09; C09B; C09B1/00; C09B1/16; C09B1/20; C09B1/36; C09B1/46; C09B1/467
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
7 words
NEW ANTHRAQUINONE VAT DYESTUFFS OF THE FORMULA
Claim 2
Dependent Claim
7 words
NEW ANTHRAQUINONE VAT DYESTUFFS OF 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) | 1971-05-21 | 1971-11-20 | 1972-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-21 | 1975-11-20 | 1976-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-21 | 1979-11-20 | 1980-05-21 | $7700.00 | Window Closed / Lapsed |