US2364017A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of blue-black toned silver images
Assignee: EIDP Inc
•
Filing: 1943-03-06
•
Granted: 1944-11-28
•
Expires: 1963-03-06
Abstract
No abstract record available.
Inventors
- 👤 Walter D Baldsiefen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:51
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/35; G03C5/00; G03C5/26; G03C5/29; G03C5/305; Y; Y10; Y10S; Y10S430/00; Y10S430/135; Y10S430/162; Y10S430/166; Y10S430/167
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1947-11-28 | 1948-05-29 | 1948-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1951-11-28 | 1952-05-29 | 1952-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1955-11-28 | 1956-05-29 | 1956-11-28 | $7700.00 | Window Closed / Lapsed |