US3357985A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Benzothioxanthene dicarboxylic acid imide dyestuffs
Assignee: Hoechst AG
•
Filing: 1966-07-18
•
Granted: 1967-12-12
•
Expires: 1986-07-18
Abstract
No abstract record available.
Inventors
- 👤 Fuchs Otto
- 👤 Troster Helmut
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:06
CPC Classifications
C; C09; C09B; C09B57/00; C09B57/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
4 words
DYESTUFF OF THE FORMULA
Claim 2
Dependent Claim
4 words
DYESTUFF OF THE FORMULA
References Cited (Backward Citations)
US1892241A
Cited
US2487105A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-12-11 | 1971-06-12 | 1971-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-12-11 | 1975-06-12 | 1975-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-12-11 | 1979-06-12 | 1979-12-12 | $7700.00 | Window Closed / Lapsed |