Patent US3817995A successfully refreshed from Google Patents.
US3817995A
Expired / Lapsed
US
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Hydroxy 3,4-dinydro-2h-1,4-benzoxazines and benzthiazines
Assignee: L'Oréal SA
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Filing: 1972-05-17
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Granted: 1974-06-18
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Expires: 1992-05-17
Abstract
Abstract Oxidation dye coupling compounds for use in dyeing live human hair having the formula:
Inventors
- 👤 A Bugaut
- 👤 F Estradier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 19:01
CPC Classifications
A; A61; A61Q; A61Q5/00; A61Q5/10; A61K; A61K8/00; A61K8/18; A61K8/30; A61K8/49; C; C07; C07D; C07D265/00; C07D265/28; C07D265/34; C07D265/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
22 words
A compound of claim 1 selected from the group consisting of 6-hydroxy benzomorpholine, 8-hydroxy benzomorpholine, 4-methyl-6-hydroxy benzomorpholine, 3-methyl-6-hydroxy benzomorpholine and 8-hydroxy-6-methyl benzomorpholine.
Claim 2
Independent Claim
9 words
A method for preparing a compound having 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) | 1977-06-17 | 1977-12-17 | 1978-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-17 | 1981-12-17 | 1982-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-17 | 1985-12-17 | 1986-06-18 | $7700.00 | Window Closed / Lapsed |