Patent US3148187A successfully refreshed from Google Patents.
US3148187A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sulfonated cyanine and merocyanine dyes
Assignee: Eastman Kodak Co
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Filing: 1962-01-22
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Granted: 1964-09-08
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Expires: 1982-01-22
Abstract
No abstract record available.
Inventors
- 👤 Donald W Heseltine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:09
CPC Classifications
C; C09; C09B; C09B23/00; C09B23/10; C09B23/105; C09B23/02; C09B23/102; C09B23/107
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
15 words
A DYE CONTAINING AT LEAST ONE NUCLEAR SULFO GROUP SELECTED FROM THOSE HAVING THE FORMULA:
Claim 2
Dependent Claim
15 words
A DYE CONTAINING AT LEAST ONE NUCLEAR SULFO GROUP SELECTED FROM THOSE HAVING THE FORMULA:
Claim 3
Dependent Claim
16 words
A PROCESS FOR THE DIRECT NUCLEAR SULFONATION OF A DYE SELECTED FROM THOSE HAVING THE FORMULA:
Claim 4
Dependent Claim
16 words
A PROCESS FOR THE DIRECT NUCLEAR SULFONATION OF A DYE SELECTED FROM THOSE HAVING THE FORMULA:
References Cited (Backward Citations)
BE559840A
Cited
US2463264A
Cited
CH235570A
Cited
US2526632A
Cited
US2646355A
Cited
US2609371A
Cited
GB803361A
Cited
US2905667A
Cited
US2809123A
Cited
US2921067A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-09-08 | 1968-03-09 | 1968-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-08 | 1972-03-09 | 1972-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-08 | 1976-03-09 | 1976-09-08 | $7700.00 | Window Closed / Lapsed |