Patent US2657205A successfully refreshed from Google Patents.
US2657205A
Expired / Lapsed
US
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Dyes containing a vinyl sulfone
Assignee: Hoechst AG
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Filing: 1950-12-20
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Granted: 1953-10-27
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Expires: 1970-12-20
Abstract
No abstract record available.
Inventors
- 👤 Heyna Johannes
- 👤 Schumacher Wilhelm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:52
CPC Classifications
C; C09; C09B; C09B62/00; C09B62/44; C09B62/503; C09B1/00; C09B1/16; C09B1/20; C09B1/26; C09B1/32; C09B1/34; C09B1/343; C09B51/00; Y; Y10; Y10S; Y10S8/00; Y10S8/916; Y10S8/917
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
22 words
DYESTUFFS SELECTED FROM THE CLASS CONSISTING OF AZO-DYESTUFFS, NITRO-DYESTUFFS, ANTHRAQUINONEDYESTUFFS AND TRIPHENYL-METHANE-DYESTIFFS, CONTAINING AT LEAST ONE SULFONIC ACID GROUP AND THE GROUPING
Claim 2
Dependent Claim
22 words
DYESTUFFS SELECTED FROM THE CLASS CONSISTING OF AZO-DYESTUFFS, NITRO-DYESTUFFS, ANTHRAQUINONEDYESTUFFS AND TRIPHENYL-METHANE-DYESTIFFS, CONTAINING AT LEAST ONE SULFONIC ACID GROUP AND THE GROUPING
References Cited (Backward Citations)
US2163180A
Cited
US2082156A
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GB492749A
Cited
US2434150A
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US2424493A
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US2432403A
Cited
US2539704A
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GB901199A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-10-26 | 1957-04-27 | 1957-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-10-26 | 1961-04-27 | 1961-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-10-26 | 1965-04-27 | 1965-10-27 | $7700.00 | Window Closed / Lapsed |