US3406070A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the manufacture of optically brightened photographic material
Assignee: BASF Schweiz AG
•
Filing: 1965-02-19
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Granted: 1968-10-15
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Expires: 1985-02-19
Abstract
No abstract record available.
Inventors
- 👤 Oetiker Alfred
- 👤 Schaefer Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:39
CPC Classifications
C; C09; C09B; C09B23/00; C09B23/10; C09B23/105; C09B23/14; C09B23/141; C09B23/148; G; G03; G03C; G03C1/00; G03C1/005; G03C1/04; G03C1/053; G03C1/76; G03C1/815; G03C1/8155; Y; Y10; Y10S; Y10S430/00; Y10S430/134
Claims Analysis
Total Claims: 0
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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) | 1971-10-15 | 1972-04-15 | 1972-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-15 | 1976-04-15 | 1976-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-15 | 1980-04-15 | 1980-10-15 | $7700.00 | Window Closed / Lapsed |