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Patent US2232405A successfully refreshed from Google Patents.
US2232405A
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Process and preparation for the manufacture of azo dyestuffs
Assignee: GAF Chemicals Corp
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Filing: 1938-11-26
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Granted: 1941-02-18
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Expires: 1958-11-26
Abstract
No abstract record available.
Inventors
- 👤 Schmelzer Albert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:48
CPC Classifications
D; D06; D06P; D06P1/00; D06P1/02; D06P1/12; D06P1/127
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) | 1944-02-18 | 1944-08-19 | 1945-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-02-18 | 1948-08-19 | 1949-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-02-18 | 1952-08-19 | 1953-02-18 | $7700.00 | Window Closed / Lapsed |