Patent US3284436A successfully refreshed from Google Patents.
US3284436A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Monoazo dyestuffs containing an amino-naphthol
Assignee: Bayer AG
•
Filing: 1965-11-23
•
Granted: 1966-11-08
•
Expires: 1985-11-23
Abstract
No abstract record available.
Inventors
- 👤 Frisch Franz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:56
CPC Classifications
C; C09; C09B; C09B29/00; C09B29/24; C09B29/28; C09B29/30; C09B67/00; Y; Y10; Y10S; Y10S534/00; Y10S534/01
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
24 words
AN AZO DYESTUFF OF THE FORMULA 1-((3-(R-NH-SO2-),4-CL-PHENYL)-N=N-),2-NH2,6-(H-O3S-), 8-OH-NAPHTHALENE WHEREIN R IS A MEMBER SELECTED FROM THE GROUP CONSISTING OF 2,4-DIMETHYLPHENYL, 3,5-DIMETHYLPHENYL, 3,6-DIMETHYLPHENYL AND 2,4,6-TRIMETHYLPHENYL.
Claim 2
Dependent Claim
24 words
AN AZO DYESTUFF OF THE FORMULA 1-((3-(R-NH-SO2-),4-CL-PHENYL)-N=N-),2-NH2,6-(H-O3S-), 8-OH-NAPHTHALENE WHEREIN R IS A MEMBER SELECTED FROM THE GROUP CONSISTING OF 2,4-DIMETHYLPHENYL, 3,5-DIMETHYLPHENYL, 3,6-DIMETHYLPHENYL AND 2,4,6-TRIMETHYLPHENYL.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-11-07 | 1970-05-09 | 1970-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-07 | 1974-05-09 | 1974-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-07 | 1978-05-09 | 1978-11-08 | $7700.00 | Window Closed / Lapsed |