Patent US918244A successfully refreshed from Google Patents.
US918244A
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US
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Lake from sulfonated azo dyes.
Assignee: G Siegle & Co G M B H
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Filing: 1908-01-02
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Granted: 1909-04-13
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Expires: 1928-01-02
Abstract
No abstract record available.
Inventors
- 👤 Emil Wuerthner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:38
CPC Classifications
C; C09; C09B; C09B63/00; A; A24; A24F; A24F15/00; A24F15/12
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) | 1912-04-12 | 1912-10-12 | 1913-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1916-04-12 | 1916-10-12 | 1917-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1920-04-12 | 1920-10-12 | 1921-04-13 | $7700.00 | Window Closed / Lapsed |