Patent US2601619A successfully refreshed from Google Patents.
US2601619A
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Optical viewer for films
Assignee: Individual
•
Filing: 1949-03-31
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Granted: 1952-06-24
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Expires: 1969-03-31
Abstract
No abstract record available.
Inventors
- 👤 Peter B Loomis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:21
CPC Classifications
G; G02; G02B; G02B27/00; G02B27/02; G02B27/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR324455A
Cited
US1752952A
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US1989454A
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US2071121A
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US2071120A
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US2190646A
Cited
US2368480A
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US2543240A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-06-24 | 1955-12-24 | 1956-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-06-24 | 1959-12-24 | 1960-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-06-24 | 1963-12-24 | 1964-06-24 | $7700.00 | Window Closed / Lapsed |