US2455142A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Condenser type photographic enlarger with exchangeable lenses and adjustable lamp housing
Assignee: Simmon Brothers Inc
•
Filing: 1946-02-26
•
Granted: 1948-11-30
•
Expires: 1966-02-26
Abstract
No abstract record available.
Inventors
- 👤 Simmon Rudolph
- 👤 Simmon Alfred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:56
CPC Classifications
G; G03; G03B; G03B27/00; G03B27/32; G03B27/326
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1932701A
Cited
US2229761A
Cited
US2249228A
Cited
US2233744A
Cited
US2344558A
Cited
US2312562A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-11-30 | 1952-05-31 | 1952-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-11-30 | 1956-05-31 | 1956-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-11-30 | 1960-05-31 | 1960-11-30 | $7700.00 | Window Closed / Lapsed |