US3318700A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Application of dyestuff bleaching catalysts in the silver dyestuff bleaching process
Assignee: BASF Schweiz AG
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Filing: 1963-09-05
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Granted: 1967-05-09
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Expires: 1983-09-05
Abstract
No abstract record available.
Inventors
- 👤 Anderau Walter
- 👤 Mory Rudolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:19
CPC Classifications
C; C07; C07D; C07D241/00; C07D241/36; C07D241/38; C09; C09B; C09B17/00; C09B35/00; C09B35/02; C09B35/021; C09B35/023; C09B39/00; C09B43/00; C09B43/12; C09B62/00; C09B62/02; C09B62/04; C09B62/08; C09B62/09; G; G03; G03C; G03C7/00; G03C7/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
47 words
A PROCESS FOR THE PRODUCTION OF A COLOR PHOTOGRAPHIC IMAGE BY THE SILVER DYESTUFF BLEACHING PROCESS, WHICH COMPRISES CARRYING OUT THE BLEACHING OPERATION IN THE PRESENCE OF AN AZINE CATALYST THAT CONTAINS AT LEAST ONE ACIDIC GROUP IMPARTING SOLUBILITY IN WATER AND THAT CORRESPONDS TO THE FORMULA
Claim 2
Dependent Claim
47 words
A PROCESS FOR THE PRODUCTION OF A COLOR PHOTOGRAPHIC IMAGE BY THE SILVER DYESTUFF BLEACHING PROCESS, WHICH COMPRISES CARRYING OUT THE BLEACHING OPERATION IN THE PRESENCE OF AN AZINE CATALYST THAT CONTAINS AT LEAST ONE ACIDIC GROUP IMPARTING SOLUBILITY IN WATER AND THAT CORRESPONDS TO THE FORMULA
References Cited (Backward Citations)
US2410025A
Cited
US2627461A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-05-08 | 1970-11-07 | 1971-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-08 | 1974-11-07 | 1975-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-08 | 1978-11-07 | 1979-05-09 | $7700.00 | Window Closed / Lapsed |