US2660089A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Film indexing
Assignee: Unisys Corp
•
Filing: 1949-01-21
•
Granted: 1953-11-24
•
Expires: 1969-01-21
Abstract
No abstract record available.
Inventors
- 👤 Harold T Olson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:05
CPC Classifications
G; G03; G03B; G03B27/00; G03B27/32; G03B27/52; G03B27/521
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE269886C
Cited
US1442297A
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USRE22517E
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US1548019A
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US1817728A
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US1889575A
Cited
US1826664A
Cited
US1810002A
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US2440797A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-11-23 | 1957-05-25 | 1957-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-23 | 1961-05-25 | 1961-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-23 | 1965-05-25 | 1965-11-24 | $7700.00 | Window Closed / Lapsed |