Patent US2916487A successfully refreshed from Google Patents.
US2916487A
Expired / Lapsed
US
⏱️ 0.0 years remaining
New thiazole base and cyanine dyes prepared therefrom
Assignee: Unisys Corp
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Filing: 1955-08-22
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Granted: 1959-12-08
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Expires: 1975-08-22
Abstract
No abstract record available.
Inventors
- 👤 Stevens George De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:46
CPC Classifications
C; C07; C07D; C07D277/00; C07D277/60; C09; C09B; C09B23/00; C09B23/02; C09B23/10; C09B23/14; C09B23/145
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
11 words
A DYE FROM THE GROUP CHARACTERIZED BY THE FOLLOWING GENERAL FORMULA
References Cited (Backward Citations)
US1970656A
Cited
US2020650A
Cited
US2170803A
Cited
US2342546A
Cited
US2170805A
Cited
US2170804A
Cited
US2336843A
Cited
US2336463A
Cited
US2316250A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-12-07 | 1963-06-08 | 1963-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-07 | 1967-06-08 | 1967-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-07 | 1971-06-08 | 1971-12-08 | $7700.00 | Window Closed / Lapsed |