US2979404A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for simultaneous photographic printing and developing
Assignee: Individual
•
Filing: 1957-11-07
•
Granted: 1961-04-11
•
Expires: 1977-11-07
Abstract
No abstract record available.
Inventors
- 👤 Ivan W Ellsworth
- 👤 Kenneth S Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:55
CPC Classifications
G; G03; G03B; G03B27/00; G03B27/02; G03B27/14; G03B27/30; G03B27/303
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1396770A
Cited
US1632278A
Cited
US1811029A
Cited
FR814449A
Cited
US2427443A
Cited
US2537548A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-10 | 1964-10-10 | 1965-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-10 | 1968-10-10 | 1969-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-10 | 1972-10-10 | 1973-04-11 | $7700.00 | Window Closed / Lapsed |