Patent US2584935A successfully refreshed from Google Patents.
US2584935A
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Unsymmetrical disazo dyestuffs
Assignee: GAF Chemicals Corp
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Filing: 1949-02-04
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Granted: 1952-02-05
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Expires: 1969-02-04
Abstract
No abstract record available.
Inventors
- 👤 Albert F Strobel
- 👤 William W Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:03
CPC Classifications
C; C09; C09B; C09B35/00; C09B35/02; C09B35/039; C09B35/26
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
15 words
AN AUNSYMMETRICAL DISAZO DYESTUFF HAVING, IN THE FORM OF ITS FREE ACID, THE FOLLOWING FORMULA;
References Cited (Backward Citations)
US946052A
Cited
US946051A
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US1078503A
Cited
GB215769A
Cited
GB285812A
Cited
US1851097A
Cited
US2427537A
Cited
US2476259A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-02-04 | 1955-08-06 | 1956-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-02-04 | 1959-08-06 | 1960-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-02-04 | 1963-08-06 | 1964-02-05 | $7700.00 | Window Closed / Lapsed |