US2645869A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: Individual
•
Filing: 1948-05-29
•
Granted: 1953-07-21
•
Expires: 1968-05-29
Abstract
No abstract record available.
Inventors
- 👤 Eugene B Cook
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:31
CPC Classifications
G; G03; G03B; G03B23/00; G03B23/02; G03B23/04; G03B23/042
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US564466A
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US1002078A
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US1543852A
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US2239032A
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US2349013A
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US2444971A
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US2513102A
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US2516793A
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US2533441A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-07-20 | 1957-01-19 | 1957-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-20 | 1961-01-19 | 1961-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-20 | 1965-01-19 | 1965-07-21 | $7700.00 | Window Closed / Lapsed |