US3090782A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of cyanine dyestuffs
Assignee: Bayer AG
•
Filing: 1959-03-04
•
Granted: 1963-05-21
•
Expires: 1979-03-04
Abstract
No abstract record available.
Inventors
- 👤 Coenen Max
- 👤 Weissel Oskar
- 👤 Wunder Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:13
CPC Classifications
C; C09; C09B; C09B23/00; C09B23/10; C09B23/0008; C09B23/005; C09B23/0058; C09B23/02; C09B23/06; C09B23/08; C09B23/083; C09B23/105; C09B23/14; C09B23/143; C09B23/145; D; D06; D06P; D06P5/00; D06P5/001; G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/08; G03C1/10; G03C1/12; Y; Y10; Y10S; Y10S8/00; Y10S8/92; Y10S8/927
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
41 words
A CYANINE DYESTUFF OF THE FORMULA (1-R3,2-((1-R1,3-G1,3-G2,5-E3-INDOLIN-2-YL)=C(-CN)-CH= C(-CN)-),3-G1,3-G2,5-E3-INDOLIUM)(+) Y(-) IN WHICH R1, R3, G1, AND G2 ARE EACH LOWER ALKYL, E3 IS A RADICAL OF THE GROUP CONSISTING OF HYDROGEN, LOWER ALKYL, LOWER ALKOXY, AND HALOGEN, AND Y- IS AN ANION.
Claim 2
Dependent Claim
41 words
A CYANINE DYESTUFF OF THE FORMULA (1-R3,2-((1-R1,3-G1,3-G2,5-E3-INDOLIN-2-YL)=C(-CN)-CH= C(-CN)-),3-G1,3-G2,5-E3-INDOLIUM)(+) Y(-) IN WHICH R1, R3, G1, AND G2 ARE EACH LOWER ALKYL, E3 IS A RADICAL OF THE GROUP CONSISTING OF HYDROGEN, LOWER ALKYL, LOWER ALKOXY, AND HALOGEN, AND Y- IS AN ANION.
Claim 3
Dependent Claim
8 words
A CYANINE DYESTUFF OF THE FORMULA 1,3,3-TRI(H3C-),2-((1,3,3-TRI(H3C-),5-(H3C-O-)INDOLIN-2-YL)=C(-CN)-CH=C(-CN)-),5-(H3C-O-)INDOLIUM)(+) CL(-)
Claim 4
Dependent Claim
8 words
A CYANINE DYESTUFF OF THE FORMULA 1,3,3-TRI(H3C-),2-((1,3,3-TRI(H3C-),5-(H3C-O-)INDOLIN-2-YL)=C(-CN)-CH=C(-CN)-),5-(H3C-O-)INDOLIUM)(+) CL(-)
References Cited (Backward Citations)
US2165337A
Cited
AT141488B
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US2158287A
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US2345094A
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GB620802A
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DE824819C
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US2918369A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-05-20 | 1966-11-19 | 1967-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-05-20 | 1970-11-19 | 1971-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-05-20 | 1974-11-19 | 1975-05-21 | $7700.00 | Window Closed / Lapsed |