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Patent US3853911A successfully refreshed from Google Patents.
US3853911A
Expired / Lapsed
US
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Arylmercaptonaphtholactams
Assignee: Individual
•
Filing: 1973-07-11
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Granted: 1974-12-10
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Expires: 1993-07-11
Abstract
Abstract Naphtholactam derivatives bearing one or two arylmercapto groups. The compounds are intermediates for the production of for example disperse dyes and basic dyes.
Inventors
- 👤 E Schefczik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:12
CPC Classifications
C; C07; C07D; C07D209/00; C07D209/56; C07D209/80; C07D209/90; C07D209/92
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
6 words
AN ARYLMERCAPTONAPHTHOLACTAM OF THE FORMULA (1):
Claim 2
Dependent Claim
6 words
AN ARYLMERCAPTONAPHTHOLACTAM OF THE FORMULA (1):
Claim 3
Dependent Claim
14 words
A compound as claimed in claim 1 and having the formula (Ia) or (Ib):-
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) | 1977-12-09 | 1978-06-10 | 1978-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-09 | 1982-06-10 | 1982-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-09 | 1986-06-10 | 1986-12-10 | $7700.00 | Window Closed / Lapsed |