Patent US2799672A successfully refreshed from Google Patents.
US2799672A
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New azo dyestuffs
Assignee: BASF Schweiz AG
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Filing: 1954-12-27
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Granted: 1957-07-16
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Expires: 1974-12-27
Abstract
No abstract record available.
Inventors
- 👤 Hans R Bolliger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:29
CPC Classifications
C; C09; C09B; C09B29/00; C09B29/34; C09B29/36; C09B29/3604; C09B29/3647; C09B29/3652; C09B29/366; C09B62/00; C09B62/44; C09B62/443; C09B62/447; C09B62/45; C09B62/523; C09B62/527; C09B62/53; C09B62/62; C09B62/66
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
13 words
A MONOAZA DYESTUFF WHICH IN ITS FREE ACID FORM CORRESPONDS TO THE FORMULA
Claim 2
Dependent Claim
13 words
A MONOAZA DYESTUFF WHICH IN ITS FREE ACID FORM CORRESPONDS TO THE FORMULA
References Cited (Backward Citations)
US1857244A
Cited
US2424493A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-07-15 | 1961-01-14 | 1961-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-15 | 1965-01-14 | 1965-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-15 | 1969-01-14 | 1969-07-16 | $7700.00 | Window Closed / Lapsed |