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US3510469A
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US
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Scarlet phenyl-azo-naphthol dyes
Assignee: Sumitomo Chemical Co Ltd
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Filing: 1966-12-09
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Granted: 1970-05-05
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Expires: 1986-12-09
Abstract
No abstract record available.
Inventors
- 👤 Hiroshi Sugiyama
- 👤 Hideo Otsuka Ibaraki-Shi
- 👤 Masakazu Yamamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:23
CPC Classifications
C; C09; C09B; C09B62/00; C09B62/44; C09B62/503; C09B62/507; C09B62/51
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3135730A
Cited
US3202652A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-05-04 | 1973-11-03 | 1974-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-04 | 1977-11-03 | 1978-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-04 | 1981-11-03 | 1982-05-05 | $7700.00 | Window Closed / Lapsed |