Patent US2702294A successfully refreshed from Google Patents.
US2702294A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vat dyestuffs and process of making same
Assignee: BASF Schweiz AG
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Filing: 1951-05-14
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Granted: 1955-02-15
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Expires: 1971-05-14
Abstract
No abstract record available.
Inventors
- 👤 Grelat Maurice
- 👤 Kern Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 19:12
CPC Classifications
C; C09; C09B; C09B5/00; C09B5/24; C09B5/26; C09B5/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
14 words
A VAT DYESTUFF WHICH HAS BEEN OBTAINED BY SUBJECTING THE COMPOUND OF THE FORMULA
Claim 2
Dependent Claim
14 words
A VAT DYESTUFF WHICH HAS BEEN OBTAINED BY SUBJECTING THE COMPOUND 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) | 1958-02-14 | 1958-08-16 | 1959-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-02-14 | 1962-08-16 | 1963-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-02-14 | 1966-08-16 | 1967-02-15 | $7700.00 | Window Closed / Lapsed |