US3860583A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Indolenine dyestuffs
Assignee: Bayer AG
•
Filing: 1971-12-09
•
Granted: 1975-01-14
•
Expires: 1991-12-09
Abstract
Abstract The dyestuffs are used for dyeing and printing natural and synthetic materials. AND THEIR USE AS COUPLING OR CONDENSATION COMPONENTS FOR THE MANUFACTURE OF BASIC INDOLENINE DYESTUFFS OF THE FORMULA Dihydroindoles of the formula
Inventors
- 👤 Ernst Schmitt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:06
CPC Classifications
C; C09; C09B; C09B23/00; C09B23/14; C09B23/145; C07; C07D; C07D209/00; C07D209/02; C07D209/04; C07D209/08; C07D209/10; C07D209/12; C07D209/14; C09B23/02; C09B23/06; C09B26/00; C09B26/02; C09B26/04; C09B31/00; C09B31/02; C09B31/12; C09B31/14; C09B31/15; C09B31/153; C09B31/157; C09B44/00; C09B44/10; C09B44/12; C09B44/123; C09B69/00; C09B69/02; C09B69/06
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
13 words
The dyestuff of claim 1 in which n is 0, 1 or 2.
Claim 2
Dependent Claim
12 words
The dyestuff of claim 1 in which R4 and R5 are hydrogen.
Claim 3
Dependent Claim
9 words
The basic dyestuff of claim 1 having the formula
Claim 4
Dependent Claim
9 words
The basic dyestuff of claim 1 having the formula
Claim 5
Dependent Claim
9 words
The basic dyestuff of claim 1 having the formula
Claim 6
Dependent Claim
6 words
A basic dyestuff of the formula
Claim 7
Dependent Claim
6 words
A basic dyestuff of the formula
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-01-13 | 1978-07-15 | 1979-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-13 | 1982-07-15 | 1983-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-13 | 1986-07-15 | 1987-01-14 | $7700.00 | Window Closed / Lapsed |