US2807622A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anthraquinone vat dyestuffs
Assignee: BASF Schweiz AG
•
Filing: 1956-01-03
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Granted: 1957-09-24
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Expires: 1976-01-03
Abstract
No abstract record available.
Inventors
- 👤 Holbro Theodor
- 👤 Kern Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:48
CPC Classifications
C; C09; C09B; C09B43/00; C09B43/32; C09B43/36; C09B1/00; C09B1/16; C09B1/20; C09B1/36; C09B3/00; C09B3/02; C09B3/06; C09B5/00; C09B5/24; C09B5/2409; C09B5/2427; C09B5/34; C09B5/347; C09B5/44
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)
US2453410A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-23 | 1961-03-25 | 1961-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-23 | 1965-03-25 | 1965-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-23 | 1969-03-25 | 1969-09-24 | $7700.00 | Window Closed / Lapsed |