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Patent US2909516A successfully refreshed from Google Patents.
US2909516A
Expired / Lapsed
US
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Monoazo dyestuffs
Assignee: Novartis AG
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Filing: 1958-02-14
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Granted: 1959-10-20
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Expires: 1978-02-14
Abstract
No abstract record available.
Inventors
- 👤 Jung Jean-Pierre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:52
CPC Classifications
C; C09; C09B; C09B29/00; C09B29/24; C09B29/28; C09B29/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
18 words
A MONOAZO DYESTUFF WHICH IS FREE FROM SULPHONIC ACID AND CARBOXYLIC ACID GROUPS AND CORRESPONDS TO THE FORMULA:
Claim 2
Dependent Claim
18 words
A MONOAZO DYESTUFF WHICH IS FREE FROM SULPHONIC ACID AND CARBOXYLIC ACID GROUPS AND CORRESPONDS TO 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) | 1962-10-19 | 1963-04-20 | 1963-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-10-19 | 1967-04-20 | 1967-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-10-19 | 1971-04-20 | 1971-10-20 | $7700.00 | Window Closed / Lapsed |