US2628960A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metallized spirit-soluble azo dyestuffs
Assignee: GAF Chemicals Corp
•
Filing: 1949-01-03
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Granted: 1953-02-17
•
Expires: 1969-01-03
Abstract
No abstract record available.
Inventors
- 👤 Harlan B Freyermuth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:21
CPC Classifications
C; C09; C09B; C09B45/00; C09B45/02; C09B45/14; C09B45/20; C09B45/48; C09B45/487
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
12 words
THE SPIRIT-SOLUBLE CYCLOHEXYLAMINE SALT OF THE COBALT COMPLEX OF 1-(2''-HYDROXY-5'' -SULFOPHENYLAZO) -2-NAPHTHOL.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-02-17 | 1956-08-18 | 1957-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-02-17 | 1960-08-18 | 1961-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-02-17 | 1964-08-18 | 1965-02-17 | $7700.00 | Window Closed / Lapsed |