US2978345A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilization of zinc ferricyanide
Assignee: EIDP Inc
•
Filing: 1958-05-15
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Granted: 1961-04-04
•
Expires: 1978-05-15
Abstract
No abstract record available.
Inventors
- 👤 Clarke Ray Allen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:52
CPC Classifications
C; C01; C01C; C01C3/00; C01C3/08; C01C3/12; B; B41; B41M; B41M5/00; B41M5/025; B41M5/0253
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
79 words
A PROCESS OF STABILIZING ZINC FERRICYANIDE AGAINST DECOMPOSITION UNDER THE ACTION OF LIGHT, WHICH COMPRISES MODIFYING THE SAME BY THE AID OF IONIZABLE, WATER-SOLUBLE GUANIDINE SALTS AND ZINC SALTS IN THE PRESENCE OF CHLORIDE IONS, THE QUANTITIES OF SAID SALTS BEING SUFFICIENT TO SUPPLY FROM 2 TO 12 MOLES OF GUANIDINIUM ION AND FROM 12 TO 2 MOLES OF EXCESS ZINC ION, AND THE QUANTITY OF CHLORIDE IONS PRESENT BEING FROM 40 TO 10 MOLES, PER MOLE OF ZN3(FE(CN)6)2.
Claim 2
Dependent Claim
79 words
A PROCESS OF STABILIZING ZINC FERRICYANIDE AGAINST DECOMPOSITION UNDER THE ACTION OF LIGHT, WHICH COMPRISES MODIFYING THE SAME BY THE AID OF IONIZABLE, WATER-SOLUBLE GUANIDINE SALTS AND ZINC SALTS IN THE PRESENCE OF CHLORIDE IONS, THE QUANTITIES OF SAID SALTS BEING SUFFICIENT TO SUPPLY FROM 2 TO 12 MOLES OF GUANIDINIUM ION AND FROM 12 TO 2 MOLES OF EXCESS ZINC ION, AND THE QUANTITY OF CHLORIDE IONS PRESENT BEING FROM 40 TO 10 MOLES, PER MOLE OF ZN3(FE(CN)6)2.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-03 | 1964-10-03 | 1965-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-03 | 1968-10-03 | 1969-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-03 | 1972-10-03 | 1973-04-04 | $7700.00 | Window Closed / Lapsed |