Patent US2798090A successfully refreshed from Google Patents.
US2798090A
Expired / Lapsed
US
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Process for preparing benzalaniline-3-sulfonic acid compounds
Assignee: Eastman Kodak Co
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Filing: 1953-03-02
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Granted: 1957-07-02
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Expires: 1973-03-02
Abstract
No abstract record available.
Inventors
- 👤 Max W Krell
- 👤 Flaven E Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 16:22
CPC Classifications
C; C09; C09B; C09B33/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
16 words
THE PROCESS FOR PREPARING BENZALANILINE-3-SULFONIC ACID COMPOUND WHICH IS THEIR FREE ACID FORM HAVE THE FORMULA:
Claim 2
Dependent Claim
16 words
THE PROCESS FOR PREPARING BENZALANILINE-3-SULFONIC ACID COMPOUND WHICH IS THEIR FREE ACID FORM HAVE THE FORMULA:
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-07-01 | 1960-12-31 | 1961-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-01 | 1964-12-31 | 1965-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-01 | 1968-12-31 | 1969-07-02 | $7700.00 | Window Closed / Lapsed |