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Patent US3236891A successfully refreshed from Google Patents.
US3236891A
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Nitrophenylenediamine derivatives
Assignee: L'Oréal SA
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Filing: 1961-04-12
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Granted: 1966-02-22
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Expires: 1981-04-12
Abstract
No abstract record available.
Inventors
- 👤 Seemuller John Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:48
CPC Classifications
A; A61; A61K; A61K8/00; A61K8/18; A61K8/30; A61K8/40; A61K8/41; A61K8/418; A61Q; A61Q5/00; A61Q5/06; A61Q5/065; C; C09; C09B; C09B51/00; D; D06; D06P; D06P3/00; D06P3/02; D06P3/04; D06P3/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
34 words
A NITRO-PARA-PHENYLENEDIAMINE IN WHICH THE NITRO GROUP IS A META POSITION TO ONE OF THE AMINO GROUPS, AND IN WHICH THE AMINO GROUP REMOTE FROM THE NITRO IS A GROUP WHICH HAS THE FORMULA
Claim 2
Dependent Claim
34 words
A NITRO-PARA-PHENYLENEDIAMINE IN WHICH THE NITRO GROUP IS A META POSITION TO ONE OF THE AMINO GROUPS, AND IN WHICH THE AMINO GROUP REMOTE FROM THE NITRO IS A GROUP WHICH HAS THE FORMULA
References Cited (Backward Citations)
US2750326A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-02-21 | 1969-08-23 | 1970-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-21 | 1973-08-23 | 1974-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-21 | 1977-08-23 | 1978-02-22 | $7700.00 | Window Closed / Lapsed |