US2612496A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acid azo dyes
Assignee: GASPAR
•
Filing: 1948-04-02
•
Granted: 1952-09-30
•
Expires: 1968-04-02
Abstract
No abstract record available.
Inventors
- 👤 Gaspar Bela
- 👤 Dreyfuss Paul Daniel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:45
CPC Classifications
C; C09; C09B; C09B35/00; C09B35/02
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
6 words
AN AZO DYE OF THE FORMULA
References Cited (Backward Citations)
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GB190214576A
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US1101739A
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US1150675A
Cited
GB191408569A
Cited
US1663950A
Cited
US1699427A
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US2125625A
Cited
GB514353A
Cited
US2424066A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-09-30 | 1956-03-31 | 1956-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-09-30 | 1960-03-31 | 1960-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-09-30 | 1964-03-31 | 1964-09-30 | $7700.00 | Window Closed / Lapsed |