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US2905666A
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Sensitizing dyes from 2-methyl-4, 5-dihydro-beta-naphthothiazole
Assignee: Unisys Corp
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Filing: 1955-05-10
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Granted: 1959-09-22
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Expires: 1975-05-10
Abstract
No abstract record available.
Inventors
- 👤 Stevens George De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:13
CPC Classifications
C; C09; C09B; C09B23/00; C09B23/02; C07; C07D; C07D277/00; C07D277/60; C07D277/84; C09B23/10; C09B23/14; C09B23/145; C09B23/146
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
12 words
A DYE SELECTED FROM THE GROUP CHARACTERIZED BY THE FOLLOWING GEMERAL FORMULA:
References Cited (Backward Citations)
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US2166736A
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US2263749A
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US2322015A
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US2495260A
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US2338782A
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US2320654A
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US2330203A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-09-21 | 1963-03-23 | 1963-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-21 | 1967-03-23 | 1967-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-21 | 1971-03-23 | 1971-09-22 | $7700.00 | Window Closed / Lapsed |