US3184482A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anthraquinone formamidines of primary amines
Assignee: F Hoffmann La Roche AG
•
Filing: 1961-11-20
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Granted: 1965-05-18
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Expires: 1981-11-20
Abstract
No abstract record available.
Inventors
- 👤 Steiger Norbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:55
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/60; C07D213/72; C07D213/74; C07D277/00; C07D277/02; C07D277/20; C07D277/32; C07D277/58; C07D277/60; C07D277/62; C07D277/68; C07D277/82; C07F; C07F9/00; C07F9/66; C07F9/70; C07F9/74; C09; C09B; C09B1/00; C09B1/16; C09B1/20; C09B1/205; C09B43/00; C09B43/11
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
12 words
A COMPOUND SELECTED FROM THE GROUP CONSISTING OF COMPOUNDS OF THE FORMULA
Claim 2
Dependent Claim
12 words
A COMPOUND SELECTED FROM THE GROUP CONSISTING OF COMPOUNDS OF THE FORMULA
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) | 1968-05-17 | 1968-11-16 | 1969-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-05-17 | 1972-11-16 | 1973-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-05-17 | 1976-11-16 | 1977-05-18 | $7700.00 | Window Closed / Lapsed |