US3499762A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic elements comprising novel u.v.-absorbing optical brightening agents
Assignee: Eastman Kodak Co
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Filing: 1966-11-03
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Granted: 1970-03-10
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Expires: 1986-11-03
Abstract
No abstract record available.
Inventors
- 👤 Homer W J Cressman
- 👤 Robert J Tuite
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:33
CPC Classifications
C; C07; C07D; C07D409/00; C07D409/02; C07D409/04; G; G03; G03C; G03C1/00; G03C1/76; G03C1/815; G03C1/8155; G03F; G03F7/00; G03F7/004; G03F7/027; G03F7/028; G03F7/0285; 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) | 1973-03-09 | 1973-09-08 | 1974-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-09 | 1977-09-08 | 1978-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-09 | 1981-09-08 | 1982-03-10 | $7700.00 | Window Closed / Lapsed |