US2894440A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device to develop photographic layercarriers by the diffusion process
Assignee: Individual
•
Filing: 1954-10-25
•
Granted: 1959-07-14
•
Expires: 1974-10-25
Abstract
No abstract record available.
Inventors
- 👤 Boger Marius Friedrich Wilhelm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:38
CPC Classifications
G; G03; G03D; G03D9/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
BE515587A
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US66994A
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US2732778A
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US2140438A
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US2139224A
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US2657618A
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US2664801A
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DE856845C
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DE853262C
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US2742838A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-07-13 | 1963-01-12 | 1963-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-07-13 | 1967-01-12 | 1967-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-07-13 | 1971-01-12 | 1971-07-14 | $7700.00 | Window Closed / Lapsed |