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US2969351A
Expired / Lapsed
US
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New metalliferous ortho:ortho'-dihydroxy-monoazo-dyestuffs
Assignee: Durand and Huguenin AG
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Filing: 1958-03-10
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Granted: 1961-01-24
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Expires: 1978-03-10
Abstract
No abstract record available.
Inventors
- 👤 Grossmann Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:28
CPC Classifications
C; C25; C25D; C25D11/00; C25D11/02; C25D11/04; C25D11/18; C25D11/24; C25D11/243
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
9 words
COMPLEX METAL COMPOUNDS OF ORTHO:ORTHO''-DIHYDROXY-MONOAZO-DYESTUFFS OF THE GENERAL FORMULA
Claim 2
Dependent Claim
9 words
COMPLEX METAL COMPOUNDS OF ORTHO:ORTHO''-DIHYDROXY-MONOAZO-DYESTUFFS OF THE GENERAL 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) | 1964-01-24 | 1964-07-25 | 1965-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-01-24 | 1968-07-25 | 1969-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-01-24 | 1972-07-25 | 1973-01-24 | $7700.00 | Window Closed / Lapsed |