US3367937A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Benzothioxanthene dicarboxylic acid imide dyestuffs
Assignee: Hoechst AG
•
Filing: 1965-07-27
•
Granted: 1968-02-06
•
Expires: 1985-07-27
Abstract
No abstract record available.
Inventors
- 👤 Fuchs Otto
- 👤 Troster Hclmut
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:36
CPC Classifications
C; C07; C07D; C07D495/00; C07D495/02; C07D495/06; C09; C09B; C09B55/00; C09B57/00; C09B57/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
5 words
A DYESTUFF OF THE FORMULA
Claim 2
Dependent Claim
5 words
A 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) | 1971-02-05 | 1971-08-07 | 1972-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-02-05 | 1975-08-07 | 1976-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-02-05 | 1979-08-07 | 1980-02-06 | $7700.00 | Window Closed / Lapsed |