Patent US2998175A successfully refreshed from Google Patents.
US2998175A
Expired / Lapsed
US
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Automatic developing system
Assignee: Individual
•
Filing: 1956-07-05
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Granted: 1961-08-29
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Expires: 1976-07-05
Abstract
No abstract record available.
Inventors
- 👤 Charles H Topping
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:09
CPC Classifications
G; G03; G03D; G03D3/00; G03D3/08; G03D3/13; G03D3/132; G03D13/00; G03D13/007; G03D3/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1679239A
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US1763629A
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US1686907A
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US1759092A
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US2048182A
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US2202127A
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US2292511A
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US2681802A
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US2568431A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-08-28 | 1965-02-27 | 1965-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-28 | 1969-02-27 | 1969-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-28 | 1973-02-27 | 1973-08-29 | $7700.00 | Window Closed / Lapsed |