US3531290A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Direct positive silver halide emulsions containing excess halide
Assignee: Eastman Kodak Co
•
Filing: 1967-02-24
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Granted: 1970-09-29
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Expires: 1987-02-24
Abstract
No abstract record available.
Inventors
- 👤 Roberta A Litzerman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:09
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/485; G03C1/48515; G03C1/48523; G03C1/4853; C; C09; C09B; C09B23/00; C09B23/02; C09B23/04; C09B23/06; C09B23/10; C09B23/102; C09B23/107; G03C1/035; G03C2001/03517; G03C2001/03541; Y; Y10; Y10S; Y10S430/00; Y10S430/143
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) | 1973-09-28 | 1974-03-30 | 1974-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-28 | 1978-03-30 | 1978-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-28 | 1982-03-30 | 1982-09-29 | $7700.00 | Window Closed / Lapsed |