Patent US1701248A successfully refreshed from Google Patents.
US1701248A
Expired / Lapsed
US
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Yellow monoazo dyestuffs fast to light and process of preparing them
Assignee: Grasselli Dyestuff Corp
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Filing: 1927-08-13
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Granted: 1929-02-05
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Expires: 1947-08-13
Abstract
No abstract record available.
Inventors
- 👤 Wagner Hermann
- 👤 Vossen Bartholomaus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:37
CPC Classifications
C; C09; C09B; C09B29/00; C09B29/24; C09B29/28; C09B29/30; C09B29/34; C09B29/36; C09B29/3604; C09B29/3647; C09B29/3652; C09B29/366
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) | 1932-02-05 | 1932-08-06 | 1933-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1936-02-05 | 1936-08-06 | 1937-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1940-02-05 | 1940-08-06 | 1941-02-05 | $7700.00 | Window Closed / Lapsed |