US648623A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blue trisazo dye.
Assignee: FARBENFABRIKEN OF ELBERFELD Co
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Filing: 1900-01-13
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Granted: 1900-05-01
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Expires: 1920-01-13
Abstract
No abstract record available.
Inventors
- 👤 Adolf Israel
- 👤 Richard Kothe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:00
CPC Classifications
C; C09; C09B; C09B31/00; C09B31/16; C09B31/22
Claims Analysis
Total Claims: 0
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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) | 1903-05-01 | 1903-10-31 | 1904-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1907-05-01 | 1907-10-31 | 1908-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1911-05-01 | 1911-10-31 | 1912-05-01 | $7700.00 | Window Closed / Lapsed |