Patent US2863859A successfully refreshed from Google Patents.
US2863859A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bis-(triazolyl)-azo dyes
Assignee: Research Corp
•
Filing: 1954-08-09
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Granted: 1958-12-09
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Expires: 1974-08-09
Abstract
No abstract record available.
Inventors
- 👤 Shreve Randolph Norris
- 👤 Charlesworth Robert Koridon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:34
CPC Classifications
C; C09; C09B; C09B35/00; C09B35/02; C09B35/039; C09B35/34
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
5 words
A DYE HAVING THE FORMULA:
References Cited (Backward Citations)
US2346531A
Cited
US2432419A
Cited
US2490967A
Cited
US2671775A
Cited
AT173521B
Cited
US2744116A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-12-08 | 1962-06-09 | 1962-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-08 | 1966-06-09 | 1966-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-08 | 1970-06-09 | 1970-12-09 | $7700.00 | Window Closed / Lapsed |