US3927005A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Naphtholactam dyestuffs
Assignee: Bayer AG
•
Filing: 1974-02-27
•
Granted: 1975-12-16
•
Expires: 1994-02-27
Abstract
Abstract This invention relates to naptholactam dyestuffs which contain benzazoles as well as to methods for their preparation. Also disclosed are the manners of using them for dyeing and printing natural and synthetic materials.
Inventors
- 👤 Horst Harnisch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:16
CPC Classifications
C; C09; C09B; C09B23/00; C09B23/0008; C09B23/0033; C09B23/005; C09B23/12; C09B57/00; C09B57/06; Y; Y10; Y10S; Y10S8/00; Y10S8/92; Y10S8/922; Y10S8/924
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
5 words
NAPHTHOLACTAM DYESTUFFS OF THE FORMULA
Claim 2
Dependent Claim
5 words
NAPHTHOLACTAM DYESTUFFS OF THE FORMULA
Claim 3
Dependent Claim
5 words
Naphtholactam dyestuff of the formula
Claim 4
Dependent Claim
5 words
Naphtholactam dyestuff of the formula
Claim 5
Dependent Claim
27 words
Naphtholactam dyestuffs according to claim 2, wherein W1 represents hydrogen, W2 represents hydrogen, chlorine, bromine or one of the SO3M-groups and W3 represents CONH2, COOH or CN.
References Cited (Backward Citations)
US2953561A
Cited
US3090782A
Cited
US3399191A
Cited
US3539583A
Cited
US3649645A
Cited
US3691187A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-15 | 1979-06-16 | 1979-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-15 | 1983-06-16 | 1983-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-15 | 1987-06-16 | 1987-12-16 | $7700.00 | Window Closed / Lapsed |