US3236749A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Single-step direct image-forming electrolytic developer and process for photoconductographic processing
Assignee: Eastman Kodak Co
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Filing: 1962-02-13
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Granted: 1966-02-22
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Expires: 1982-02-13
Abstract
No abstract record available.
Inventors
- 👤 Ralph W Baxendale
- 👤 Raymond F Reithel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:10
CPC Classifications
G; G03; G03G; G03G17/00; G03G17/02
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
73 words
A SINGLE-STEP DIRECT IMAGE-FORMING ELECTROLYTIC DEVELOPER FOR PHOTOCONDUCTOGRAPHIC PROCESSING CONTAINING AN AQUEOUS SOLUTION OF: (1) IRON IONS; (2) A WATER-SOLUBLE MATERIAL SELECTED FROM THE CLASS CONSISTING OF THE WATER-SOLUBLE THIOSULFATES, THE WATER-SOLUBLE ORGANIC SULFIDES, THE WATER-SOLUBLE THIOURONIUM COMPOUNDS, THE WATER-SOLUBLE ISOTHIOURONIUM COMPOUNDS, THE WATER-SOLUBLE THIOSEMICARBAZIDE COMPOUNDS AND THE WATER-SOLUBLE POLYMERIC SULFIDES; (3) A WATER-SOLUBLE IONIZABLE NICKLE SALT; AND ( 4) A COMPOUND SELECTED FROM THE CLASS CONSISTING OF CALCIUM ACETATE AND MAGNESIUM ACETATE.
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) | 1969-02-21 | 1969-08-23 | 1970-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-21 | 1973-08-23 | 1974-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-21 | 1977-08-23 | 1978-02-22 | $7700.00 | Window Closed / Lapsed |