US3443953A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic materials for the silver dyestuff bleaching process
Assignee: BASF Schweiz AG
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Filing: 1965-11-30
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Granted: 1969-05-13
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Expires: 1985-11-30
Abstract
No abstract record available.
Inventors
- 👤 Hansrolf Loeffel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:59
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/28; G03C7/29; C; C09; C09B; C09B43/00; C09B43/12; C09B43/136; C09B43/145
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2286714A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-05-12 | 1972-11-11 | 1973-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-12 | 1976-11-11 | 1977-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-12 | 1980-11-11 | 1981-05-13 | $7700.00 | Window Closed / Lapsed |