US2604832A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reflex camera optical system, including telephoto lens and telescope finder
Assignee: Farrand Optical Co Inc
•
Filing: 1948-06-09
•
Granted: 1952-07-29
•
Expires: 1968-06-09
Abstract
No abstract record available.
Inventors
- 👤 Leonard F Barcus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:54
CPC Classifications
G; G03; G03B; G03B19/00; G03B19/02; G03B19/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1724566A
Cited
DE586031C
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US1958280A
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FR755987A
Cited
FR760954A
Cited
US2100967A
Cited
GB489125A
Cited
US2219314A
Cited
US2182097A
Cited
US2364652A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-07-29 | 1956-01-28 | 1956-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-29 | 1960-01-28 | 1960-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-29 | 1964-01-28 | 1964-07-29 | $7700.00 | Window Closed / Lapsed |