US3794676A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for n-monomethylating certain acyl or carbalkoxy nitro-p-phenylenediamines
Assignee: P&G Hair Care Holding Inc
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Filing: 1971-01-12
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Granted: 1974-02-26
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Expires: 1991-01-12
Abstract
Abstract N-MONOMETHYLATES CERTAIN ACYL OR CARBALKOXY MITRO-PPHENYLENEDIAMINE COMPOUNDS BY REACTING SAID NITRO-PPHENYLENDEIAMINE COMPOUNDS WITH A MIXTURE CONTAINING FORMALDEHYDE OR PARAFORMALDEHYDE AND SULFURIC ACIDS.
Inventors
- 👤 A Halasz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:19
CPC Classifications
A; A61; A61Q; A61Q5/00; A61Q5/06; A61Q5/065; A61K; A61K8/00; A61K8/18; A61K8/30; A61K8/40; A61K8/41; A61K8/418; A61Q5/10
Claims Analysis
Total Claims: 0
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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) | 1977-02-25 | 1977-08-27 | 1978-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-25 | 1981-08-27 | 1982-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-25 | 1985-08-27 | 1986-02-26 | $7700.00 | Window Closed / Lapsed |