US1818075A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Condensation products and vat dyestuffs of the benzanthrone series
Assignee: General Aniline Works Inc
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Filing: 1928-12-03
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Granted: 1931-08-11
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Expires: 1948-12-03
Abstract
No abstract record available.
Inventors
- 👤 Luettringhaus Arthur
- 👤 Neresheimer Heinrich
- 👤 Eichholz Willy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 01:24
CPC Classifications
C; C09; C09B; C09B5/00; C09B5/24; C09B5/2409; C09B5/2427
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) | 1934-08-10 | 1935-02-09 | 1935-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1938-08-10 | 1939-02-09 | 1939-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1942-08-10 | 1943-02-09 | 1943-08-11 | $7700.00 | Window Closed / Lapsed |