Patent US3564125A successfully refreshed from Google Patents.
Patent US2458648A successfully refreshed from Google Patents.
US2458648A
Expired / Lapsed
US
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Photographic enlarging easel
Assignee: Individual
•
Filing: 1946-04-04
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Granted: 1949-01-11
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Expires: 1966-04-04
Abstract
No abstract record available.
Inventors
- 👤 Robert P Saunders
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:23
CPC Classifications
G; G03; G03B; G03B27/00; G03B27/32; G03B27/52; G03B27/58; G03B27/582
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1447444A
Cited
US1486196A
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US1545390A
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US1745900A
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US2166878A
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US2199304A
Cited
US2256894A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-01-11 | 1952-07-12 | 1953-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-01-11 | 1956-07-12 | 1957-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-01-11 | 1960-07-12 | 1961-01-11 | $7700.00 | Window Closed / Lapsed |