US2985656A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anthraquinone vat dyestuffs
Assignee: BASF Schweiz AG
•
Filing: 1958-02-21
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Granted: 1961-05-23
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Expires: 1978-02-21
Abstract
No abstract record available.
Inventors
- 👤 Weber Kurt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:06
CPC Classifications
G; G08; G08C; G08C19/00; G08C19/16; G08C19/28; C; C09; C09B; C09B62/00; C09B62/02; B; B01; B01J; B01J37/00; B01J37/0009; B01J37/0018; C09B1/00; C09B1/16; C09B1/20; C09B1/36; C09B1/50; C09B1/54; C09B1/545; C09B43/00; C09B43/32; C09B43/36; C09B62/022; C09B62/024
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
7 words
AN ANTHRAQUINONE VAT DYESTUFF OF THE FORMULA
Claim 2
Dependent Claim
7 words
AN ANTHRAQUINONE VAT DYESTUFF 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) | 1964-05-22 | 1964-11-21 | 1965-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-22 | 1968-11-21 | 1969-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-22 | 1972-11-21 | 1973-05-23 | $7700.00 | Window Closed / Lapsed |