Patent US3211554A successfully refreshed from Google Patents.
US3211554A
Expired / Lapsed
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Photographic layers for the silver dyestuff bleaching method
Assignee: BASF Corp
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Filing: 1961-07-11
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Granted: 1965-10-12
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Expires: 1981-07-11
Abstract
No abstract record available.
Inventors
- 👤 Dreyfuss Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:32
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/28; G03C7/29; C; C09; C09B; C09B35/00; C09B35/02; C09B35/039; C09B35/26; C09B35/28; C09B39/00; C09B43/00; C09B43/12; C09B43/124; C09B43/136; C09B43/155
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
22 words
A PHOTOGRAPHIC SILVER HALIDE EMULSIN LAYER FOR THE SILVER DYSTUFF BEACHING PROCES, WHICH LAYER IS COLORED WITH AN AZODYESTUFF OF THE FORMULA
Claim 2
Dependent Claim
22 words
A PHOTOGRAPHIC SILVER HALIDE EMULSIN LAYER FOR THE SILVER DYSTUFF BEACHING PROCES, WHICH LAYER IS COLORED WITH AN AZODYESTUFF OF THE FORMULA
References Cited (Backward Citations)
US2294892A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-10-11 | 1969-04-12 | 1969-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-11 | 1973-04-12 | 1973-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-11 | 1977-04-12 | 1977-10-12 | $7700.00 | Window Closed / Lapsed |