Patent US3310552A successfully refreshed from Google Patents.
US3310552A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water-soluble monoazo dyestuffs
Assignee: Sandoz AG
•
Filing: 1964-02-03
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Granted: 1967-03-21
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Expires: 1984-02-03
Abstract
No abstract record available.
Inventors
- 👤 Ischer Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:53
CPC Classifications
C; C09; C09B; C09B62/00; C09B62/44; C09B62/78; C09B62/82
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
WATER SOLUBLE MONO-AZO-DYESTUFF OF THE FORMULA
Claim 2
Dependent Claim
6 words
WATER SOLUBLE MONO-AZO-DYESTUFF OF THE FORMULA
References Cited (Backward Citations)
US2128255A
Cited
US2799672A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-03-20 | 1970-09-19 | 1971-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-20 | 1974-09-19 | 1975-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-20 | 1978-09-19 | 1979-03-21 | $7700.00 | Window Closed / Lapsed |