Patent US4532923A successfully refreshed from Google Patents.
Patent US4081439A successfully refreshed from Google Patents.
US4081439A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aromatic disazo pigments
Assignee: Novartis Corp
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Filing: 1976-08-25
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Granted: 1978-03-28
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Expires: 1996-08-25
Abstract
Abstract Disazo pigments of the formula <IMAGE> WHEREIN X and Y denote hydrogen or halogen atoms, alkyl or alkoxy groups containing 1-6 carbon atoms, or aryloxy, trifluoromethyl, nitro, cyano or carboxylic acid ester groups, or wherein X and Y conjointly denote a fused benzene ring are useful for coloring plastics, lacquers and printing inks in yellow shades.
Inventors
- 👤 Stefan Hari
- 👤 Karl Ronco
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:26
CPC Classifications
C; C09; C09B; C09B33/00; C09B33/02; C09B33/153
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
A compound of the formula ##STR8##
Claim 2
Dependent Claim
6 words
A compound of the formula ##STR8##
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) | 1981-03-27 | 1981-09-26 | 1982-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-03-27 | 1985-09-26 | 1986-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-03-27 | 1989-09-26 | 1990-03-28 | $7700.00 | Window Closed / Lapsed |