Patent US2990128A successfully refreshed from Google Patents.
US2990128A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Developing device for films
Assignee: Individual
•
Filing: 1957-01-25
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Granted: 1961-06-27
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Expires: 1977-01-25
Abstract
No abstract record available.
Inventors
- 👤 Hansen Kaare
- 👤 Knutsen Erling Johannes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:35
CPC Classifications
G; G03; G03D; G03D13/00; G03D13/02; G03D13/08; G03D13/14; G03D13/145
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US957991A
Cited
US1188217A
Cited
US2280113A
Cited
US2315532A
Cited
US2297525A
Cited
FR878501A
Cited
GB555485A
Cited
US2371073A
Cited
US2461039A
Cited
GB652611A
Cited
US2608357A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-26 | 1964-12-26 | 1965-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-26 | 1968-12-26 | 1969-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-26 | 1972-12-26 | 1973-06-27 | $7700.00 | Window Closed / Lapsed |