Patent US2627786A successfully refreshed from Google Patents.
US2627786A
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US
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Adjustable liquid color filter for photographic enlargers
Assignee: Simmon Brothers Inc
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Filing: 1948-07-20
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Granted: 1953-02-10
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Expires: 1968-07-20
Abstract
No abstract record available.
Inventors
- 👤 Simmon Alfred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:43
CPC Classifications
G; G03; G03B; G03B27/00; G03B27/72; G03B27/73; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/265; Y10T74/00; Y10T74/20; Y10T74/20012
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US786613A
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US1646500A
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US1739478A
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US1782328A
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US1902387A
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US1887285A
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US2085190A
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US2300251A
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US2470584A
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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) | 1956-02-10 | 1956-08-11 | 1957-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-02-10 | 1960-08-11 | 1961-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-02-10 | 1964-08-11 | 1965-02-10 | $7700.00 | Window Closed / Lapsed |