US2605684A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for semiwet development of photoprints
Assignee: Chemische Fabriek L Van der Grinten NV
•
Filing: 1948-10-05
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Granted: 1952-08-05
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Expires: 1968-10-05
Abstract
No abstract record available.
Inventors
- 👤 Nagels Frederik
- 👤 Selen Johannes Hubert Gerardus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:54
CPC Classifications
G; G03; G03D; G03D5/00; G03D5/06; G03D5/067
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US687481A
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DE519243C
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US2241104A
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US2249089A
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US2265856A
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US2524818A
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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) | 1955-08-05 | 1956-02-04 | 1956-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-08-05 | 1960-02-04 | 1960-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-08-05 | 1964-02-04 | 1964-08-05 | $7700.00 | Window Closed / Lapsed |