US2878742A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dry type developing tank apparatus
Assignee: TECHNIFAX Corp
•
Filing: 1956-01-16
•
Granted: 1959-03-24
•
Expires: 1976-01-16
Abstract
No abstract record available.
Inventors
- 👤 Frederick O Trump
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:41
CPC Classifications
G; G03; G03D; G03D7/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1980188A
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GB598921A
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US2515144A
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US2478850A
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US2641980A
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US2589748A
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US2499840A
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GB667376A
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US2563666A
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US2630744A
Cited
GB702792A
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US2649303A
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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) | 1962-03-23 | 1962-09-22 | 1963-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-23 | 1966-09-22 | 1967-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-23 | 1970-09-22 | 1971-03-24 | $7700.00 | Window Closed / Lapsed |